Project Zero 2: Wii Edition, known in Japan as Zero: Shinku no Chō, is a 2012 survival horror video game developed by Tecmo Koei Games and published by Nintendo for the Wii. The game is a remake of Fatal Frame II: Crimson Butterfly (2003), and follows sisters Mio and Mayu Amakura as they are trapped in a ghost-filled village cursed by a failed ritual. Gameplay follows Mio as she explores the village searching for Mayu, fighting hostile ghosts using the Fatal Frame series' recurring Camera Obscura. The game includes new endings, and an on-rails first-person minigame.

Original director Makoto Shibata and producer Keisuke Kikuchi reprised their roles, incorporating unused concepts from Fatal Frame: Mask of the Lunar Eclipse (2008). The gameplay was reworked based on Mask of the Lunar Eclipse, and the characters and environments redesigned. Singer-songwriter Tsuki Amano returned to provide a new theme song. While released in Japan and PAL regions. Journalists generally praised the gameplay alterations compared to the original, but faulted its control scheme and English dub.

Project Zero 2: Wii Edition is a survival horror in which the player controls Mio Amakura as she searches for her twin sister Mayu in the haunted Minakami Village. The game is a remake of Fatal Frame II: Crimson Butterfly (2003). Basic gameplay is carried over from the original. Mio explores Minakami Village, solving puzzles and fighting hostile ghosts to progress through the game. She can pick up progression items and resources including health restoratives and film types, with the latter of which serving as ammunition for the Fatal Frame series' recurring weapon the Camera Obscura. Using the Camera Obscura when ghosts appear, the game switches to a first-person perspective where Mio must take photos of ghosts to damage them. Greater damage is dealt when a ghost is photographed at chose range, in mid-attack, or when multiple ghosts are caught in the same shot. The Camera Obscura can be upgraded using lenses found during the game, and points earned by both defeating hostile ghosts and taking photographs of non-hostile ghosts which briefly appear.

Unlike the overhead fixed-perspective camera of the original, Project Zero 2: Wii Edition uses an over-the-shoulder camera similar to Resident Evil 4. The controls are adjusted for the Wii Remote and Nunchuck, incorporating motion control elements for controlling the Camera Obscura and aiming a torch in earlier parts of the game. An element carried over from the fourth series entry Mask of the Lunar Eclipse is the need to hold the action button to interact with objects or pick up items. A ghost hand may randomly appear and attack while the button is held, requiring Mio to break free if caught. A new game mode is "Haunted House", a first-person on-rails experience with stages unlocked by progressing through the story and accessed through the friendly ghost Kureha. During these stages, players may be required to either take pictures of ghosts, collect dolls while pursued by a spirit that is frozen when looked at, or keep the Nunchuck still when a ghost suddenly appears.

Siblings Mio and Mayu Amakura visit a woodland soon to be flooded by a dam project; while playing there as children, Mayu fell and permanently injured her leg trying to keep up with a running Mio, leaving their relationship strained. A crimson butterfly leads the twins to Minakami Village, a place said to trap visitors. The two are assaulted by ghosts, including the spirit of Sae Kurosawa who begins influencing Mayu. Years before, Sae and her twin sister Yae were to be sacrifices to pacify a power beneath the village dubbed the "Hellish Abyss"; the ritual involved one twin strangling the other, merging their souls into a crimson butterfly. Yae fled the village, and when Sae was sacrificed alone the Hellish Abyss consumed the village and Sae returned as a powerful vengeful spirit. Sae now seeks to reenact the ritual through Mio and Mayu.

The game has six endings, four of them carried over from the original game and its Xbox port, and two new endings triggered by viewing cutscenes relating to the twins' past. Other unlock conditions include playing the game on different difficulty levels, or completing the final battle within a given time limit. In the original four, Mio can abandon Mayu and escape alone, kill Mayu while in a trance-like state, complete the ritual, banish Sae from Mayu at the cost of being blinded by the Hellish Abyss, or carry Yae's ghost to Sae so they complete the ritual while sparing Mayu. In the two new endings, Mio either accepts dying in the village with Mayu so they can be together forever, or is killed by an insane Mayu after banishing Sae and refusing to complete the ritual.

The original Crimson Butterfly, the second entry in the Fatal Frame series, was released for PlayStation 2 in 2003, and ported the following year to Xbox with added story and gameplay content. Following completion of Fatal Frame: Mask of the Lunar Eclipse (2008) for the Wii, which saw extensive gameplay and design changes compared to earlier Fatal Frame titles, series creators Makoto Shibata and Keisuke Kikuchi decided to remake one of the earlier games in the style of Mask of the Lunar Eclipse. The team also had several leftover ideas that were not implemented into Mask of the Lunar Eclipse, allowing the team to also expand upon and improve their new systems using the remake. Production began in 2010 after the team at Tecmo Koei Games had settled on their production goals. Shibata and Kikuchi returned respectively as lead director and producer. Nintendo's Toru Osawa and Toshiharu Izuno were respective co-director and co-producer, and co-programmers. Shibata had previously worked with Osawa and Izuno on Mask of the Lunar Eclipse. The team polished and expanded the "Touch System", where players hold a button to pick up items, to make the experience more unsettling. Due to the change in camera angle, the environment needed to be fully redesigned. The Haunted House mini-game−a series first−was included at Shibata's suggestion, going from a mode with ties to the story to a self-contained bonus mode. Early plans for player-created maps with set scares options was scrapped in favor of random events taking place within preset areas.

The art design was reworked for the remake, with lead characters Mio and Mayu being redesigned as older and less "cute" under Kikuchi's guidance. The redesigns needed to take the camera angle into account, as Mio would not be seen much from the front outside cutscenes. The team also included a new ghost character called Kureha, originally intended as playing a role in mini-games. New music was composed by Riichiro Kuwabara. Tsuki Amano, who created the original Crimson Butterfly ending theme "Chou", returned to create a new ending theme "Kurenai". Amano was not surprised when approached by Shibata, as she both knew of the remake's development well in advance and enjoyed working on the series. She had some trouble creating a new theme, reusing the strong motif from "Chou". She described the song as a "little sister" to the original version's theme.