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Lego Hidden Side
SubjectGhost, supernatural, and mystery solving with interactive augmented reality
Licensed fromThe Lego Group
AvailabilityAugust 2019–December 2020
Total sets32[1]
CharactersJack Davids, Parker L. Jackson, Dr. J.B. Watt, El Fluego, Spencer and TeeVee
Official website

Lego Hidden Side (stylized as LEGO Hidden Side) is a discontinued Lego theme that was first introduced in August 2019.[2][3] It took place in the fictional city of "Newbury" and linked Lego playsets to an app of the same name (for iOS and Android), which was used to hunt, capture and collect ghosts via augmented reality.[4][5] The series came on the market in 2019 and, after the discontinued Lego Dimensions and Nexo Knights series, represented another attempt by The Lego Group to link digital and real game worlds. It was accompanied by the Lego Hidden Side webisode series and a television special, which was released on the Lego YouTube channel, and on Cartoon Network. The product line was discontinued by the end of 2020.[6]

Overview

[edit]

Lego Hidden Side was a Lego product line that was designed to provide an experience that combines both physical and digital play. This has been described by The Lego Group as "fluid play".[7] The Hidden Side theme involved traditional brick built playsets, but combined them with augmented reality. This involved the use of a smartphone app that brought the sets to life and revealed a hidden digital world that offers various challenges. The digital world represented the "hidden side", a hidden world that is populated by virtual ghosts. The app provided the interactive aspect of the experience when a smartphone was held up to the physical sets.[8]

The augmented reality play experience focused on the main characters Jack and Parker who begin ghost-catching in Newbury. Players explored the various haunted locations of Newbury through these characters, with clues about the city's history of paranormal activity revealed within the sets.[9]

Development

[edit]

Lego Hidden Side began with a brief given to the company's Creative Play Lab to develop a concept for a "Play-Theme 2.0", a theme that would include augmented reality to enhance physical Lego play. The team at the Creative Play Lab came up with many concepts and tested them with children to assess their reactions. Senior Design Manager Sven Robin Kahl commented, "It was clear they needed to create a ghost theme, as that concept worked so well with the digital layer. Digital ghosts that can only be seen with the phone!"[10]

The theme was also the result of an extensive investigation by The Lego Group into augmented reality gameplay with the use of advanced hardware. To implement the functionality, the theme required ARKit for iOS users and ARCore for Android on mobile devices. This was a capability that could be accessed by most children in the primary market.[11] The theme was developed as a team process between the model designers and the app developers. Senior Product Lead, Murray Andrews commented that the integration of the app functionality offered certain challenges stating, "a simple example is you are holding the phone in one hand and you have to interact with the model, you have only got the other hand to do it. So they had to simplify some of the functions to be able to use one hand rather than two handed functions. That was just an interesting journey that we went on with this project, with the designers having to learn new ways of making things work."[12]

The sets were designed to appear like existing Lego urban buildings but, when used in conjunction with the app, were interactive. The augmented reality placed a graphic overlay on the image of the sets that transformed buildings, vehicles or Lego minifigures into paranormal creations. Roberto Marchesi, lead digital creative explained, "We didn't want to have a really cool game that was working in isolation from the sets. We wanted to create a holistic experience with AR." The process of developing an augmented reality game was particularly challenging for the design team and required an investigation into what good augmented reality really meant. Marchesi explained, "When we started this process, we didn't even know what good AR play was because no one had good AR play where you go back and forth between the digital and physical interaction. There was a lot of exploration and learning based on the simple mechanics involved of looking through your phone, taking stock of what you see, and then acting accordingly."[9]

Launch

[edit]

The Lego Hidden Side theme was launched in August 2019.[9] As part of the marketing campaign, The Lego Group engaged The Mill to create an event that was designed to create awareness of the theme. The event invited five YouTube influencers to take part in an interactive ghost hunting experience, which involved the characters from the storyline. The event was subsequently broadcast on YouTube.[13]

Characters

[edit]
  • Jack Davids: He is a "cool YouTuber" who recently moved to Newbury and used to be the new kid along with his mother, who is the principal of his high school and is unaware of her son's ghost hunting life. He usually wears a hoodie and a baseball cap. Voiced by Corey Krueger.[14][15][16][17]
  • Douglas Elton / El Fuego: He is the school caretaker, sports teacher and stuntman. It is revealed that he wanted to be stuntman but got hurt every time he tried to do a stunt, leading him to be a school caretaker at Newbury High until ghosts arrived in town. Jack, Parker and J.B. recruited him as their own stuntman called "El Fuego". He used to be human in Season 1 but got turned into a skeleton when he sacrificed himself in the episode titled Skeleton in the Closet. Voiced by William Kasten.[18][19][20]
  • Parker L. Jackson: She is Jack's classmate and is described as an outsider in school. Her parents are always busy and they are oblivious about her life as a ghost hunter. She is the great-great-great-great-granddaughter of Vaughn G. Jackson, Newbury's original ghost/monster hunter. Voiced by Amelia Clover.[21][22][16][23]
  • Dr. J.B. Watt: She is Newbury's scientific authority, who discovered how to manipulate and capture the ghosts using the app and mostly operates from her research laboratory. She used to have a bus named "Sweet Sally" and she never gets it dirty despite having a messy lab and having high tech ghost hunting gear on it. She sacrificed her bus to trap Lady E. in the Season 2 finale titled The Lighthouse but replaced it with a fire truck called Sweet Sally Jr. Voiced by L.C. Curci.[24][25]
  • Spencer: He is Jack's "ghost dog" who used to be alive until he died.[26][27][17]
  • TeeVee: J.B.'s robotic assistant.[16]

Construction sets

[edit]

According to BrickLink, The Lego Group released 32 playsets and promotional packs based on the Hidden Side theme.[1]

First wave sets

[edit]
Lego Hidden Side: Newbury Haunted High School

On 14 February 2019, it was officially announced by The Lego Group that the first wave sets[28] of Lego Hidden Side theme was launched at the New York Toy Fair on 1 August 2019.[29][30][31] The eight sets[32][33][34] being released are J.B.'s Ghost Lab (set number: 70418),[35] Wrecked Shipping Boat (set number: 70419),[35][36] Graveyard Mystery (set number: 70420),[35] El Fuego's Stunt Truck (set number: 70421),[35] Shrimp Shack Attack (set number: 70422),[35][26][37] Paranormal Intercept Bus 3000 (set number: 70423),[35][38] Ghost Train Express (set number: 70424)[35][39] and Newbury Haunted High School (set number: 70425).[35][17][40][41] Later, Newbury Juice Bar (set number: 40336)[42][43] is an exclusive set only available on September until October 2019[44] as a promotion.[45][46] Each of the sets that allow the player to download the App in their smartphone and find the hidden ghosts.[47][48][49] The sets were designed primarily for children with an age rating of 7+ or above.

Second wave sets

[edit]

On 27 November 2019, it was announced that the second wave sets[50][51][52] would be released on 1 January 2020.[53][54][55][56] The six sets released were Welcome to the Hidden Side (set number: 70427),[57] Jack's Beach Buggy (set number: 70428),[16][57] El Fuego's Stunt Airplane (set number: 70429),[57] Newbury Subway Station (set number: 70430),[57] The Lighthouse of Darkness (set number: 70431),[57][58] Haunted Fairground (set number: 70432).[16][57][59][60][61] Also included Drag Racer (set number: 40408)[62][63] is an exclusive set only available in January 2020 as a promotion.[64]

Third wave sets

[edit]

Later, the third wave sets[65][66] would be released on 1 June 2020. The five sets being released are J.B's Submarine (set number: 70433),[67] Supernatural Race Car (set number: 704234),[67] Abandoned Newburry Prison (set number: 70435),[67] Ghost Fire Truck 3000 (set number: 70436)[67][68][69] and Mystery Castle (set number: 70437).[16][67] In addition, the two polypag sets have been released as a promotions are Chef Enzo's Haunted Hotdogs (set number: 30463)[37][70][71] and El Fuego's Stunt Cannon (set number: 30464).[70][72]

The product line was discontinued and all sets were retired by the end of 2020.[73]

Web episodes

[edit]

The product line was accompanied by a series of animated short films that was released on YouTube. The series followed the story of Jack, Parker and their friends who aim to clean up the ghosts in Newbury. This series was created by Mikkel Lee and executive produced by Tommy Andreasen, Robert Fewkes, Sanjee Gupta and Joshua Wexler. It was produced by Pure Imagination Studios, written by Lila Scott[74] and directed by Zac Moncrief.[75]

Cast

[edit]
  • Andy Alberto: Bawa Bat, Biker Joey (ep. 8), Lighthouse Keeper (ep. 19)
  • Lindsey Alena: Lady E, Linda (ep. 11)
  • Mike Anthony: Clown Boss Ghost (ep. 12)
  • Bruce Baker: Nibbs
  • Amelia Clover: Parker
  • LC Curci: JB, Nanny Mamali
  • Eric Emery: Dale Trucker Boss Ghost (ep. 14)
  • Paul Edwards: Dr. Drewell
  • Michael Johnson: Spewer (ep. 6), Biker Dwayne (ep. 8), Mr. Clarke (ep. 11)
  • William Kasten: Douglas, Captain Jonas (ep. 3), Chief Silento (ep. 4), Bob (ep. 11), Weather Boss Ghost
  • Corey Krueger: Jack, Archibald, Jonas Jr. (ep. 3)
  • Deborah Marlowe: Rose (ep. 11)
  • Christopher Molinari: Mason
  • Paige Mount: Worker Nana (ep. 6)
  • Ben Rausch: Conductor Boss Ghost (ep. 15)
  • Wally Wingert: Vaughn

Season 1

[edit]

In the first season, 11 web shorts were released on YouTube.[76]

# Title Release date Notes
1 Face Your Fears[77] October 16, 2019 LEGO Hidden Side computer-animated series
2 Vlog Hog[78] October 23, 2019
3 Sink or Swim[79] October 31, 2019
4 Don't Choke Now[80] November 6, 2019
5 Bat Crazy[81] November 15, 2019
6 Potty Mouth[82] November 20, 2019
7 Gloom and Doom[83] November 27, 2019
8 Life in the Ghost Lane[84] December 4, 2019
9 Good Chemistry[85] December 11, 2019
10 Skeleton in the Closet[86] December 18, 2019
11 Parents Just Don't Understand[87] January 30, 2020

Season 2

[edit]

In the second season, nine web shorts were released on YouTube.[88]

# Title Release date Notes
1 Carnival of Doom[89] February 6, 2020 LEGO Hidden Side computer-animated series
2 Flying Lessons[90] February 13, 2020
3 Doom Buggy[91] February 20, 2020
4 Oh, Rats![92] February 27, 2020
5 Grave Situation[93] March 5, 2020
6 Haunting 101[94] April 2, 2020
7 The Great Escape[95] April 9, 2020
8 The Lighthouse, Part 1[96] April 16, 2020
9 The Lighthouse, Part 2[97] April 23, 2020

TV special

[edit]

Lego Hidden Side: Night of the Harbinger Halloween Special is a 44 minutes television special in Lego animation, based on Lego theme of Lego Hidden Side, produced by Pure Imagination Studios. The special premiered on Cartoon Network in the US on 31 October 2020.[98][99][100] Also included the voice cast are Amelia Clover, L.C. Curci, William Kasten, Corey Krueger and Wally Wingert.

Video game and app

[edit]

Lego Brawls

[edit]
Main article: Lego Brawls

A crossover mobile fighting game named Lego Brawls was developed by RED Games. Lego Brawls was released exclusively for Apple Arcade on September 19, 2019, for iOS devices, and made available for PC and Consoles in June 2022.[101][102][103][104] It includes Jack Davids and Parker L. Jackson as playable characters.[105][106]

App

[edit]

The Lego Hidden Side app was released on 29 July 2019, and was the mobile app for the Lego Hidden Side theme, available for the operating systems iOS and Android.[107][108][109][110] The app had since received several updates that increased the game options. Players were able to choose between playing the game in ghost mode or in ghost hunter mode. In ghost mode, the player was haunted by other players in a first-person shooter,[111][112] in a location not unlike Newbury. In ghost hunter mode, the player had the task of catching as many ghosts as possible. To do this, the player scanned a set that was supplemented by additional elements on the screen via augmented reality. Depending on the set, different ghosts would've appeared - including a set-dependent boss spirit - which could then be caught. Captured ghosts were then collected and could have been viewed in the app, including their short biographies.[113][114][115] The Lego Hidden Side app was discontinued in 2023.[116][117]

Awards and nominations

[edit]

The Hidden Side Haunted Fairground (set number: 70432) was the overall winner of the Editor's Choice Awards at Toy Fair 2020 at Olympia, London, which is an annual awards event organised by the British Toy and Hobby Association.[118]

The Hidden Side Paranormal Intercept Bus (set number: 70423) was listed as one of the "10 best Lego sets 2021" by official website Pocket-lint.[119]

See also

[edit]

References

[edit]
[edit]
Revisions and contributorsEdit on WikipediaRead on Wikipedia

Lego Hidden Side

View on Grokipedia
from Grokipedia
Lego Hidden Side is a discontinued augmented reality (AR)-enhanced construction toy theme produced by the Lego Group, introduced on February 14, 2019, and made available globally in late summer of that year.[1] Set in the fictional coastal town of Newbury, the theme revolves around a team of young ghost hunters—primarily the friends Jack and Parker—who investigate supernatural hauntings using specialized equipment.[2] The core concept integrates physical Lego building sets depicting haunted locations and vehicles with a free companion mobile app, enabling interactive gameplay where scanning the models reveals a digital "Hidden Side" world filled with ghosts, puzzles, and mysteries to solve.[1] Targeted at children aged 7 and older, the theme emphasizes hybrid play, where manipulating the physical builds influences the AR experience, and vice versa, fostering creativity, problem-solving, and ghost-capturing missions to restore normalcy to the haunted environment.[1] The initial lineup consisted of eight haunted building sets, each with transforming elements and hidden surprises for standalone role-play, including the Newbury Haunted High School (a multi-story school with interactive ghost-hunting features), the Welcome to the Hidden Side (a gateway tree model), and the Graveyard Mystery (a nighttime cemetery scene).[1] Subsequent waves in 2020 expanded to over a dozen sets, such as the Haunted Fairground (a carnival with ride mechanisms) and the Lighthouse of Darkness (a coastal structure with a jet ski), incorporating minifigures like the ghost-hunting duo, their allies, and various spectral antagonists.[2] The AR app, available on iOS and Android, not only animates the sets with dynamic ghosts and environmental effects but also supports multiplayer modes and ongoing updates that introduced new challenges, ghosts, and story elements post-launch.[1] Complementing the toys, Lego Hidden Side featured a series of 20 animated webisodes titled Face Your Fears, released between October 2019 and June 2020 on the official Lego YouTube channel and platforms like Peacock and Apple TV, which expanded the narrative with episodic adventures involving the characters' investigations.[3] Despite critical acclaim for its innovative blend of physical and digital play, the theme was discontinued by the end of 2020 due to underwhelming sales, with the supporting app fully shutting down in early 2023, rendering the AR features inoperable.[4][5] This short-lived line remains notable for pioneering AR integration in Lego products, influencing later hybrid themes.[1]

Overview

Concept and theme

Lego Hidden Side is a discontinued Lego construction toy line that ran from 2019 to 2020, featuring a series of buildable haunted playsets integrated with augmented reality (AR) technology for interactive ghost-hunting experiences.[6][1] The theme's premise centers on players exploring paranormal mysteries in a haunted environment, where physical Lego models serve as portals to a digital realm teeming with ghosts that must be captured to restore normalcy.[1] The "Hidden Side" refers to a parallel ghostly realm that overlaps with the everyday world, revealed and accessed exclusively through the companion mobile app when scanning the built sets.[1] This spectral dimension is set in the fictional town of Newbury, a once-ordinary community now plagued by supernatural occurrences, where everyday locations like schools and graveyards become hotspots for otherworldly activity.[1] Designed for children aged 7 and older, the theme emphasizes a seamless blend of traditional Lego brick-building creativity with modern digital interactivity, encouraging imaginative play that bridges physical construction and virtual exploration.[1] A key unique selling point of Lego Hidden Side is that the sets function effectively as standalone toys with detailed, functional builds and minifigures, while scanning them with the free app unlocks immersive AR adventures, including cooperative multiplayer modes for ghost-trapping challenges.[1][7]

Setting and gameplay mechanics

The LEGO Hidden Side universe is set in the fictional coastal town of Newbury, a seemingly ordinary American community featuring everyday locations such as schools, diners, fairgrounds, and subways that conceal ghostly portals and supernatural hauntings.[1] Ghosts in Newbury possess buildings and people, creating paranormal disturbances that blend the mundane with the eerie, prompting players to uncover hidden dimensions beneath the surface.[8] Gameplay begins with constructing a physical LEGO set, which players then scan using the companion mobile app to activate augmented reality (AR) elements and reveal virtual ghosts haunting the model. Interacting with specific "points of possession" on the build—such as movable parts or interactive features—releases these ghosts into the AR environment, where players solve puzzles in a first-person perspective to trap them, earning points that unlock upgrades like enhanced ghost-hunting tools.[1] The experience includes a single-player story mode following protagonists Jack, Parker, and their ghost dog Spencer as they investigate mysteries, alongside multiplayer modes for cooperative ghost hunts or competitive battles against friends' ghost teams.[9] Physical manipulation of the set dynamically alters the digital layer, and vice versa, creating a seamless interplay between tangible building and virtual exploration. However, the companion app was discontinued in early 2023, rendering all AR features inoperable as of that date.[1][5] Sets are designed as multi-layered builds with transforming mechanisms, such as day-to-night conversions or modular sections that reveal hidden compartments for storing minifigures, tools, or surprise elements, encouraging physical exploration and role-play even without the app.[1] These features add depth to the construction process, allowing discoveries like secret rooms or pop-out portals that tie into the AR narrative.[8] The progression system escalates through increasingly difficult ghosts, starting with basic apparitions and building to boss-level entities like the harbinger Nehmaar Reem, whose defeat often requires combining multiple sets to access advanced puzzles and unlock overarching story chapters.[4] App updates introduced randomized challenges and new spectral threats to maintain ongoing engagement across play sessions.[1]

Development

Announcement and design process

Lego Hidden Side was announced on February 14, 2019, during a press event ahead of its public showcase at the American International Toy Fair in New York City from February 16 to 19. The theme was introduced as an augmented reality (AR)-enhanced play experience set in the haunted coastal town of Newbury, where players build physical models that interact with a companion app to reveal ghosts and mysteries. This debut marked Lego's push into mixed-reality play, with eight initial sets planned for release in August 2019.[1] The design drew inspiration from ghost-hunting media, evoking the paranormal investigation style of films like Ghostbusters, while building on Lego's prior experiments in digital-physical hybrids such as the Lego Dimensions theme. Creators aimed to create a self-contained story world of hauntings in everyday locations, like schools and graveyards, to foster immersive, evolving narratives through AR. This approach sought to innovate beyond screen-based play, emphasizing "fluid play" where physical builds influence digital elements and vice versa.[10][11] Development involved close collaboration between Lego's model designers, AR team, and game developers to ensure seamless integration between sets and the app. Led by figures like Senior Product Lead Murray Andrews and overseen by Tom Donaldson, Senior Vice President of the Creative Play Lab, the process treated the theme as a unified mixed-reality project rather than separate physical and digital components. Emphasis was placed on modular builds with transforming features, such as haunted structures that shift states, to enhance replayability and encourage creative rebuilding.[11][1] Early prototyping focused on app accessibility across iOS and Android devices, with sets engineered for one-handed manipulation to accommodate holding a smartphone during play. Tests prioritized reciprocal interactions, where physical actions like rearranging bricks alter the AR environment in real-time, while avoiding over-reliance on screens by layering digital elements atop core Lego building experiences. This ensured the theme remained accessible and true to Lego's tactile roots, promoting play that bridges the physical and virtual without requiring constant device use.[11][1]

Production challenges

Integrating augmented reality (AR) with physical Lego bricks presented major technical hurdles for the Hidden Side theme, necessitating advanced scanning technology to enable precise detection and interaction between built models and the companion app. Developers had to define what constituted effective AR play from scratch, as no established precedents existed for such seamless physical-digital fusion, leading to extensive exploration of phone-based viewing mechanics and real-time responses. Ensuring compatibility across diverse smartphone platforms from multiple manufacturers proved especially demanding, requiring robust systems to handle variable hardware while maintaining set durability under repeated play.[12] The AR technology itself was inherently unreliable in suboptimal lighting or movement conditions, prompting the inclusion of user-friendly features like loading screen tips and iterative redesigns to mitigate failures. Balancing ongoing app updates with backward compatibility for existing sets demanded meticulous coordination to preserve the interconnected play experience without rendering older models obsolete. These challenges were compounded by the need for one-handed set manipulation during app use, which influenced the simplification of building functions and interactive elements.[13][11] Manufacturing the theme's components involved producing eight core building sets for the initial 2019 wave, expanded by additional sets across two subsequent waves in 2020, alongside promotional polybags, for a total of over 20 main constructions. Specialized elements, including translucent neon green, blue, and purple pieces to evoke ethereal ghosts, along with select glow-in-the-dark components like minifigure parts and accents, required precise molding techniques to achieve the desired luminous effects without compromising structural integrity.[14][4] The production effort relied on a multidisciplinary team comprising Lego's internal set designers, digital specialists for AR implementation, and external contributors handling app UI/UX design amid evolving project specifications. Early prototypes and playtesting, including sessions with children, informed refinements to enhance fluidity between physical building and digital exploration, while Toy Fair 2019 demonstrations showcased the theme's innovative potential to industry audiences.[15][13][10]

Release and discontinuation

Initial launch

The Lego Hidden Side theme debuted on August 1, 2019, with the release of its first wave of construction sets worldwide, accompanied by the launch of the free companion app on July 29, 2019, for iOS and Android devices.[1][16][17] Lego's marketing efforts emphasized the theme's augmented reality (AR) integration to blend physical building with digital ghost-hunting gameplay, featuring promotional trailers that showcased the AR fun and interactive elements. A key highlight was the unveiling of a dedicated trailer at San Diego Comic-Con in July 2019, where targeted advertising and displays aimed to engage fans of sci-fi and adventure genres. Additionally, partnerships with YouTube creators helped amplify visibility through promotional content, positioning Hidden Side as an innovative entry in Lego's tech-enhanced toy lineup.[18][19][20] The sets became available globally in major markets including the United States, Europe, and Asia, with prices ranging from approximately $20 to $150 depending on the kit's size and complexity. Initial reception praised the theme's novel AR mechanics, with reviewers highlighting its immersive gameplay and seamless app integration as a fresh evolution for Lego products.[1][18][21][22]

Theme conclusion and app shutdown

The Lego Hidden Side theme concluded production at the end of 2020 after releasing three waves of construction sets, marking the end of new physical products for the line.[23] This discontinuation followed the theme's launch in 2019 and was influenced by challenges in integrating the augmented reality app, which required compatible high-end devices and limited accessibility for younger or less tech-savvy players.[24] The heavy emphasis on digital interaction also contributed to underwhelming commercial performance, as the app-dependent gameplay alienated portions of the traditional Lego audience who preferred standalone building experiences.[25] Despite the theme's end, the Hidden Side app remained operational for over two years, receiving its final update in September 2022, at which time users were notified that servers would shut down.[26][27] The app was fully discontinued on January 1, 2023, rendering multiplayer features and new game starts inaccessible, though offline single-player modes could still be accessed on existing devices.[5] This extended support period was mandated by European Union regulations on digital content longevity, similar to other Lego app-based themes like VIDIYO, but ongoing maintenance costs for server infrastructure ultimately proved unsustainable.[26] Following discontinuation, no additional content—such as app updates, web episodes, or new sets—was produced, leaving the theme without official post-2020 expansion.[23] Existing Hidden Side construction sets continue to be available through secondary markets like online retailers and resale platforms, allowing fans to acquire them for display or limited offline play.[25] The shutdown highlighted broader issues in Lego's digital experimentation, including competition from simpler AR toys and the difficulties of sustaining app ecosystems amid evolving technology standards.[24]

Construction sets

First wave (2019)

The first wave of LEGO Hidden Side sets launched on August 1, 2019, introducing the theme's core concept of haunted builds integrated with augmented reality (AR) gameplay through a companion mobile app. These sets, targeted at children aged 7 and older, featured modular constructions of vehicles, buildings, and scenes from the fictional town of Newbury, each designed to "come alive" when scanned by the free Hidden Side app on iOS or Android devices. The app unlocked specific ghost-hunting missions, allowing players to interact with physical models to reveal digital ghosts, solve puzzles, and progress in a narrative-driven adventure. Priced between $19.99 and $129.99 USD, the sets were exclusively available through major retailers including the official LEGO Shop, Amazon, Walmart, and Toys "R" Us, with the polybag offered as a promotional item with qualifying purchases.[1][28] The eight main sets and one polybag emphasized hidden mechanisms like pop-out ghost traps, glow-in-the-dark bricks, and transforming elements to simulate hauntings, encouraging both traditional building play and app-enhanced exploration. Minifigures included protagonists like ghost hunters Jack Davids and Parker L. Jackson, alongside allies, civilians, and translucent ghost figures for role-play. Each set's AR component tied directly to its build, such as scanning a vehicle to initiate a mobile chase mission or a building to access location-specific hauntings, fostering replayability as app updates introduced new ghosts and challenges over time.[29]
Set NumberNamePiecesMinifiguresUS RRPKey Build Features and AR Ties
40336Newbury Juice Bar (polybag)1272 (Parker L. Jackson, Rocky)Free promotional (GWP with $50+ purchase)Compact juice bar stand with stools and signage; scans to unlock introductory AR ghost encounter in a street-level mission.[30]
70418J.B.'s Ghost Lab1743 (J.B., Jack, Spencer the ghost dog)$19.99Mobile lab trailer with equipment racks and a ghost trap; AR activates basic ghost detection tutorials and early app onboarding.[31]
70419Wrecked Shrimp Boat3104 (Jack Davids, Parker L. Jackson, Captain Jones, Jones Jr.)$29.99Splitting boat hull, rocky cliff, and kayak; AR reveals underwater ghosts and a boss-level shrimp-themed haunting mission.[29][32]
70420Graveyard Mystery3354 (Jack, Parker, groundskeeper, ghost)$29.99Mausoleum with opening doors, crooked tree, and graves; AR enables nighttime ghost hunts with emerging spectral figures.
70421El Fuego's Stunt Truck4284 (stunt performers, ghosts)$39.99Armored stunt truck with launching ramp and flames; AR integrates stunt sequences to distract and capture performing ghosts.
70422Shrimp Shack Attack5795 (cook, customers, ghosts)$49.99Waterfront shack with kitchen, dock, and small boat; AR simulates a chaotic attack by seafood-obsessed spirits.
70423Paranormal Intercept Bus 30006895 (team members, ghosts)$59.99Customized bus with deployable lab, haunted restroom, and roof access; AR supports on-the-go hunting with vehicle movement affecting digital pursuits.[33][34]
70424Ghost Train Express6986 (passengers, conductor, ghosts)$79.99Derailment-ready train with three cars and platform; AR triggers high-speed ghost chases along virtual tracks.
70425Newbury Haunted High School1,4748 (students, teachers, ghosts)$129.99Multi-level school with classrooms, gym, and secret rooms; AR unlocks extensive school-wide mysteries, including boss ghosts in assembly areas.[8][35]
These sets prioritized accessibility for beginners while scaling complexity, with smaller builds like the Ghost Lab serving as entry points to the app's mechanics and larger ones like the high school offering detailed modular play. Glow bricks and possession-themed accessories, such as attachable ghost parts for minifigures, added thematic depth without requiring the app. Availability was global through LEGO's direct channels and partners, though stock varied by region during the initial rollout.[36][1]

Second wave (2020)

The second wave of LEGO Hidden Side sets was released on January 1, 2020, expanding the haunted town of Newbury with six new construction kits and additional smaller sets designed to integrate seamlessly with the theme's augmented reality (AR) app. These sets introduced larger-scale builds compared to the initial offerings, emphasizing interconnected play experiences within the ongoing ghost-hunting narrative.[9] Key sets in this wave included the Welcome to the Hidden Side (70427, 189 pieces), featuring a haunted tree portal; Jack's Beach Buggy (70428, 170 pieces), a compact vehicle for coastal investigations; El Fuego's Stunt Plane (70429, 295 pieces), an aerial stunt craft with ghostly pursuits; Newbury Subway (70430, 348 pieces), depicting an underground station with interactive tracks and platforms; The Lighthouse of Darkness (70431, 540 pieces), a coastal structure with a jet ski and cliffside elements; and the Haunted Fairground (70432, 466 pieces), the wave's flagship set with a roller coaster and drop ride. A smaller boxed set, Drag Racer (40408, 134 pieces, 2 minifigures, $12.99), provided a quick-build vehicle for AR ghost chases. Polybags such as the El Fuego's Stunt Cannon (30464, 46 pieces) and Chef Enzo's Haunted Hotdogs (30463, 43 pieces) complemented these, offering quick builds for app integration.[37][38][2][39][40][41] Build innovations focused on enhanced interactivity and scale, with mechanisms like the Haunted Fairground's manually operated drop ride that simulates falling and the roller coaster's spinning track, allowing physical manipulation to trigger AR events in the app. The Lighthouse of Darkness incorporated a detachable jet ski for dynamic water-based play, while the Newbury Subway featured a push-along train that could connect to prior vehicles like the Paranormal Intercept Bus from the first wave. New minifigures expanded the roster, including ghostly variants such as additional skeletons and shadow figures, alongside updated versions of protagonists like Jack and Parker with seasonal attire.[42][2][38] AR enhancements emphasized multi-set connectivity, enabling players to scan multiple builds together for expansive hunts across Newbury's evolving landscape, with the Haunted Fairground serving as a central hub for seasonal ghost outbreaks. A new multiplayer mode in the app update allowed up to four users to collaborate in real-time, fostering team-based strategies against larger spectral threats and deepening the theme's narrative progression. This wave targeted early-year holiday extensions, building on the 2019 foundations to heighten immersion without resolving the overarching storyline.[9]

Third wave (2020)

The third wave of Lego Hidden Side sets, released in June 2020, represented the final expansion of the theme and focused on climactic story elements through larger, more intricate builds that tied together ongoing narratives from the haunted town of Newbury. These sets emphasized advanced augmented reality (AR) interactions, allowing players to engage in endgame scenarios via the companion app, where physical models unlocked digital boss battles against major antagonists like Kreatoru and The Maw.[43][44] Key releases included the J.B.'s Submarine (set 70433, 224 pieces), a compact underwater vehicle with a seabed base that integrated waterfront elements from prior waves for exploratory ghost hunts; the Newbury Abandoned Prison (set 70435, 400 pieces), featuring a modular structure with 'possessed mode' functions like opening cells and hidden escape routes to simulate tense AR pursuits; and the Mystery Castle (set 70437, 1,035 pieces), a sprawling build with an observatory tower, fold-out sections, and concealed chambers that supported role-play leading into digital confrontations. Larger offerings, such as the Phantom Fire Truck 3000 (set 70436, 760 pieces), transformed into a mecha robot for dynamic action, while the Supernatural Race Car (set 70434, 244 pieces) enabled high-speed chases with switchable wheel modes for ground and air travel in the app. All sets included minifigures of protagonists and ghosts, plus collectible ghost cards that unlocked exclusive digital content for capturing and upgrading spectral entities.[45][46][47][48][49] These builds prioritized narrative culmination, with hidden mechanisms—such as rotating prison walls or submarine hatches—triggering app-based events that revealed layered ghost lore and multiplayer co-op modes for collaborative hunts. The AR experiences culminated in finale sequences, where scanning the models initiated epic battles against overarching villains, rewarding players with story resolutions and rare ghost captures to conclude the campaign. Collectible ghost cards, included in each set, served as keys to these modes, encouraging completionists to assemble teams for optimal performance against elite foes.[46][47][50] Launched on June 1, 2020, primarily in Europe and following shortly in other markets, this wave had a notably shorter production run compared to earlier releases, as Lego announced the theme's discontinuation by year's end amid shifting priorities toward other digital-integrated lines. The limited availability contributed to increased rarity for unopened sets in secondary markets post-release.[43][4]

Characters

Protagonists and allies

Jack Davids is the primary protagonist in the Lego Hidden Side theme, portrayed as a tech-savvy teenage blogger and student at Newbury High School who discovers the ability to see ghosts through a specialized app on his smartphone. As the leader of the ghost-hunting team, Jack invents and utilizes ghost-trapping tools, such as modified cameras and detectors, to investigate hauntings and capture spectral entities in the augmented reality (AR) environment. He appears as a minifigure in nearly every major construction set from the theme's waves, often equipped with his signature hooded jacket, backpack, and electronic gadgets that tie into the interactive gameplay.[51][52][53] Parker L. Jackson serves as Jack's key partner and co-protagonist, depicted as a resourceful teenager at Newbury High School with expertise in physical navigation and quick thinking during missions. She handles agility-based challenges, such as climbing structures or evading ghosts in the AR app, complementing Jack's technological focus with her hands-on approach to exploring haunted locations. Parker is included as a minifigure in multiple sets, typically featuring her distinctive colorful hair, athletic attire, and accessories like a laptop or phone for scanning hidden threats.[51][52][53] Spencer, Jack's loyal ghostly dog companion, adds a layer of companionship and humor to the narrative as a spectral pet who assists in detecting and interacting with the Hidden Side. Having become a ghost after an unfortunate incident, Spencer provides comic relief through playful antics while aiding in AR scans to reveal hidden ghosts or clues during investigations. As a non-minifigure ghost piece, Spencer appears in several sets, often positioned near Jack to emphasize their bond and facilitate role-play scenarios.[51][52] Among the supporting allies, Professor J.B. (full name Dr. J.B. Watt) acts as a mentor and expert in paranormal science, operating from her high-tech ghost lab where she analyzes data from Jack and Parker's missions. Her eccentric, mad-scientist persona equips the team with advanced tools for ghost removal, guiding their efforts against supernatural disturbances in Newbury. Professor J.B. is represented as a minifigure in select sets, complete with lab coat, wild hair, and scientific accessories that highlight her role in the theme's inventive ghost-hunting dynamic.[51][52][53]

Ghosts and villains

Nehmaar Reem, known as The Harbinger, serves as the primary antagonist in the Lego Hidden Side theme, portrayed as an ancient spirit originating from a dimension beyond the Hidden Side who orchestrates widespread hauntings in the town of Newbury.[48] As a central figure in the augmented reality (AR) gameplay, he appears as a boss-level threat in multiple app modes, where players engage in digital confrontations to defeat him and mitigate his influence.[47] His design features a tall, imposing minifigure, emphasizing his role as an escalating harbinger-level villain that challenges ghost hunters across various sets.[48] Recurring ghosts in the theme include various spectral types tied to specific haunted locations, such as Shadow-Walkers, which function as lesser entities often serving higher threats like Nehmaar Reem.[47] These include fire-related ghosts like Blaze M. Barr, a boss ghost haunting the Phantom Fire Truck 3000 set, and graveyard spirits such as Scrimper and Waylon from the Welcome to the Hidden Side tree model.[48][54] Other examples encompass Tragico the Clown, a boss ghost at the Haunted Fairground, illustrating how ghosts are location-specific adversaries that players hunt in AR hunts.[2] The ghost hierarchy structures threats from basic lesser spirits, suitable for introductory hunts, to advanced boss-level entities that demand coordinated strategies in the app.[54] Lesser ghosts like Shadow-Walkers and Scrimper provide initial challenges, while harbinger figures such as Nehmaar Reem represent peak escalations, often requiring multiple interactions to subdue.[47] Ghost designs utilize translucent minifigures with unique accessories—such as hooded cloaks for Shadow-Walkers or fiery elements for Blaze M. Barr—to convey ethereal qualities and distinct abilities like possession or gloom attacks in the digital realm.[48] These figures are collectible through physical sets and become interactive captures within the AR app, enhancing the theme's blend of building and digital play.[47]

Media adaptations

Web series

The Lego Hidden Side web series, titled Face Your Fears, comprises 20 short animated episodes released on YouTube from October 16, 2019, to April 23, 2020, each running approximately 3 to 5 minutes and serving as mini-movies that interconnect the narratives of the construction sets with the augmented reality mobile app.[55] Produced by LEGO System A/S in collaboration with Pure Imagination Studios and SN Studios, the series was created by Mikkel Lee and features computer-animated adventures centered on ghost-hunting in the fictional town of Newbury.[55] Episodes were released weekly, often aligning with new set launches to introduce ghosts and story elements that players could then hunt in the app.[3] The voice cast includes Corey Krueger as Jack Davids, Amelia Clover as Parker L. Williamson, William Kasten as Douglas, and Lara Cody (credited as L.C. Curci) as JB, with additional performers such as Jonathan Alberto voicing Bawa Bat and Wally Wingert as Vaughn MacCready.[55] Supporting voices feature Ben Rausch, Bruce Baker, Christopher Molinari, Deborah Marlowe, Eric Emery, and Michael R. Johnson in various ghostly and human roles across the episodes.[56] The series is structured across two seasons. Season 1 consists of 10 episodes aired from October 23, 2019, to January 30, 2020, including "Vlog Hog" on October 23, which introduces the core team on a graveyard hunt, and "Sink or Swim" on October 31, focusing on an underwater ghost encounter.[57] These installments build the protagonists' ghost-hunting routine while teasing app-integrated mysteries tied to early set releases. Season 2 includes 9 episodes from February 6 to April 23, 2020, such as "Oh, Rats!" on February 27, depicting a rodent-infested haunting, and escalating toward a climactic arc involving larger supernatural threats.[58] Throughout both seasons, the episodic format emphasizes quick, action-packed resolutions that encourage viewers to engage with the physical builds and digital hunts for full context.[59]

Television special

LEGO Hidden Side: Night of the Harbinger is a 44-minute animated Halloween television special released on October 31, 2020.[60] Produced by The Lego Group, it serves as a feature-length story in the Hidden Side universe, expanding on the augmented reality theme's narrative.[61] The special was directed by Michael D. Black, with a writing credit to Lila Scott and production oversight from executives including Joshua Wexler, Jill Wilfert, and Tommy Andreasen.[62][63] The plot centers on protagonists Jack and Parker as they attempt to seal a rift to the Hidden Side during Halloween in the haunted town of Newbury. A fire ghost escapes through the portal, coated in a mysterious silvery substance that signals an impending doom for their world, leading the team to confront the harbinger entity known as Nehmaar Reem.[64] The story incorporates expanded depictions of Newbury locations and supernatural elements tied to the theme's third wave of construction sets, emphasizing the growing threat from the Hidden Side dimension.[65] Voice acting features the core cast from the Hidden Side web series, including Corey Krueger as Jack, Amelia Clover as Parker, Lara Cody as JB, and William Kasten as Douglas, with additional roles by Wally Wingert as Vaughn.[63] The animation style aligns with the 3D CGI approach used in prior Hidden Side media, blending Lego brick aesthetics with ghostly effects and AR-inspired visuals.[65] The special premiered on Cartoon Network in the United States and CITV in the United Kingdom on Halloween 2020, with subsequent availability on YouTube and streaming platforms like Peacock.[60][66] It promoted interactive AR events through the Hidden Side mobile app, encouraging viewers to scan sets for enhanced ghost-hunting experiences.[67]

Digital components

Hidden Side mobile app

The LEGO Hidden Side mobile app served as the digital core of the Hidden Side theme, integrating augmented reality (AR) with physical LEGO sets to create interactive ghost-hunting experiences. Released on July 29, 2019, as a free download for iOS and Android devices, the app required a compatible smartphone or tablet with a camera to scan and animate built sets, revealing hidden ghosts and mysteries in the fictional town of Newbury.[10][1] Core features included AR scanning of physical models to trigger in-app events, a ghost database for collecting and viewing captured spirits with detailed profiles, and customization options for player avatars, equipment, and ghost teams to enhance gameplay progression.[22][68] The app received several updates to expand content and functionality, with a notable version 2.0.1 introducing initial multiplayer capabilities on December 26, 2019, allowing up to four players to join lobbies for cooperative or competitive ghost hunts.[9] Subsequent updates included version 3.2.0 (Halloween Update) on October 1, 2020, which added seasonal ghosts, events, and themed capsules for collection; version 3.3.0 (Winter Update) on December 2, 2020, with holiday-themed content; and the final major release, version 3.4.0 (New Ghosts Update), on March 10, 2021, incorporating additional ghosts and refinements to the database.[9][69][70] Later patches, such as 3.5.4 in September 2022, focused on maintenance before full discontinuation. The app was fully discontinued in January 2023, rendering AR features inoperable.[71][5] Technically, the app supported cross-device progress syncing via LEGO accounts, enabling players to continue their ghost collections and upgrades seamlessly between devices. Multiplayer lobbies facilitated real-time interactions, with AR overlays requiring device cameras for set scanning and environmental integration, though compatibility was limited to AR-capable iOS (iPhone 6s or later) and Android devices (with ARCore support).[54][72] The app's user base peaked around its 2019 launch, driven by marketing tie-ins with new sets, but engagement declined after 2020 as support waned and the theme shifted focus.[5]

Video game integrations

Lego Hidden Side was integrated into the team action brawler Lego Brawls, a mobile game developed by RED Games Co. and published by LEGO Games, which launched exclusively on Apple Arcade in September 2019. The integration aligned with the Hidden Side theme's debut that year, extending its ghost-hunting narrative into a multiplayer format where players build and customize minifigures for battles across various Lego universes.[73][74] Within Lego Brawls, Hidden Side characters serve as playable options, including protagonists Jack Davids and Parker L. Jackson, supporting ally Mr. Clarke, and antagonists like the possessed variant of Mr. Clarke, Captain Jonas, Ghost Joey, and Ghost Dwayne. These figures come with theme-specific abilities, such as spectral attacks and ghost-hunting tools, enabling players to form teams of ghost hunters or spectral forces in combat.[75] The theme features a dedicated multiplayer arena in Lego Brawls, designed as a haunted control-point map where teams capture and defend objectives amid eerie environments inspired by Newbury's supernatural outbreaks. Gameplay emphasizes AR-like immersive elements through dynamic powers, like phasing through obstacles or summoning ghostly allies, fostering cooperative or competitive ghost battles. Special in-game events have highlighted Hidden Side content, such as seasonal challenges involving spectral showdowns and exclusive rewards tied to the theme.[76][74] No full standalone video game was produced for Lego Hidden Side; digital extensions remained limited to such crossovers and app-linked mini-games that connect physical sets to interactive challenges. Lego Brawls supported free content updates through 2020, adding new Hidden Side variants, arenas, and event modes to keep the integration fresh alongside other Lego themes.

Reception and legacy

Awards and nominations

The Lego Hidden Side theme garnered acclaim for its pioneering augmented reality (AR) features that bridged physical construction with digital interactivity. The set 70432 Haunted Fairground received the Editor's Choice Award at the 2020 London Toy Fair, voted as the overall top toy by attending media professionals and recognized for its immersive ghost-hunting gameplay.[77][78] This accolade positioned it as a standout "hero toy," emphasizing the theme's innovative AR app integration that transformed static builds into dynamic, app-enhanced adventures.[79] The Haunted Fairground was also named one of the Hero Toys 2020 by the British Toy & Hobby Association, highlighting its appeal in blending traditional Lego play with cutting-edge technology to engage young builders in supernatural storytelling.[78][80] Lego Hidden Side's media components, such as the web series and the 2020 television special Night of the Harbinger, did not secure major industry honors like Emmy or Annie Awards.[81] These recognitions underscored the theme's success in advancing the digital-physical play experience, despite its brief lifespan from 2019 to 2020.[78]

Critical and commercial impact

Lego Hidden Side experienced moderate commercial success upon its 2019 launch but ultimately underperformed relative to expectations, leading to the theme's discontinuation after three waves of sets from 2019 to 2020. The integration of augmented reality (AR) was intended to drive sales by appealing to tech-savvy younger audiences, yet the heavy reliance on a companion app may have limited broader market appeal and contributed to slower-than-anticipated uptake. Production ceased by late 2020, with remaining inventory cleared out over the following years, reflecting Lego's pattern of pivoting away from underperforming digital-hybrid themes.[25] Critically, the theme received praise for its innovative blend of physical building and AR gameplay, with reviewers highlighting the immersive ghost-hunting experience and detailed set designs. The companion app earned positive feedback for its scanning accuracy and engaging multiplayer modes, often described as a "pleasant surprise" that exceeded low initial expectations. Set reviews on retail sites averaged around 4.5 to 4.8 out of 5 stars, commending the fun, thematic builds suitable for ages 7 and up. The associated web series garnered a 7.6/10 rating on IMDb, appreciated for its short, adventurous episodes. However, criticisms focused on technical issues like awkward controls in ghost mode and device compatibility limitations, as well as the app's glitches and the overall dependency on digital elements that sometimes overshadowed traditional play. Builds were noted for fragility, with structures prone to disassembly during interaction.[68][55] In terms of legacy, Hidden Side influenced Lego's subsequent experiments with digital-physical hybrids, providing key lessons on balancing app integration with standalone play value that informed themes like Vidiyo, launched in 2021. The theme's emphasis on AR storytelling helped shape Lego's broader digital strategy, though it also highlighted risks such as short product lifecycles. Fan communities have sustained interest through secondary markets, where sets retain value for their architectural appeal, and informal AR mods using preserved app versions. Following the app's full discontinuation in early 2023, the theme's interactive elements lost functionality, reducing its original appeal but allowing sets to be appreciated primarily as creative building experiences without digital reliance.[82][23][5]

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