Hitman Go is a turn-based puzzle video game developed by Square Enix Montréal and published by Square Enix's European subsidiary. Announced in February 2014, the game was released for iOS in April 2014 and for Android in June 2014. Windows and Windows Phone versions were released the following year in April 2015. In February 2016, a "Definitive Edition" version was released on PlayStation 4, PlayStation Vita, and on Linux and Windows via Steam. It is the first game developed by Square Enix Montréal, a studio founded in 2011. Development entered full production in 2013 and was completed by eleven people using the Unity game engine.

The player guides Agent 47, protagonist of the Hitman franchise, through a series of grid-based levels. Levels are composed of nodes and lines, and presented like a board game with characters modelled as miniature figures. Enemy characters can be dispatched by moving onto the node they occupy during a turn, similar to chess. As the player advances through levels, new enemy types and mechanics are introduced to increase the complexity of puzzle solutions.

Following its announcement, Hitman Go was met with some scepticism from critics. However, the game received a positive reception with praise for the art, aesthetics, simple gameplay mechanics, and translation of Hitman to a mobile device. It also received several nominations and awards from gaming publications and award organisations. A successor set within the Tomb Raider franchise, titled Lara Croft Go, was released in August 2015.

Hitman Go is a turn-based puzzle video game part of the Hitman video game series. In the game each level is set on a grid-based board composed of interconnected nodes and lines. Nodes are positions that the player or enemies can occupy and lines are used for moving between nodes during a turn. Players take control of the series' protagonist, Agent 47. Using touchscreen controls, during a turn the player swipes along a line in the direction they want Agent 47 to move. In the "Definitive Edition" on PC, swiping is replaced by a click, hold, and drag interaction with a mouse. Once the player completes a turn, all enemies on the board will simultaneously move. Each level has a main objective for completion, such as guiding Agent 47 to the end node or assassinating a specific target. The player can assassinate enemies by moving onto the target's node, and similarly the player can be killed by enemies that move onto the player's node.

Levels become more complex as the player progresses, introducing different mechanics and new types of enemies. Each enemy type is dressed in a unique colour, allowing the player to recognise their movement patterns. Some enemies remain static or rotate on a single node, while others will patrol the board along a specific route. Later stages may require the player to collect keys located on the board and unlock doors that block access to the level objective. Trapdoors connect one location on the board to another and allow the player to move between them during a turn. Some nodes contain potted plants, the player will not be detected while occupying these nodes. Coloured disguises can be found and equipped to let the player walk past an enemy type of that colour without being detected. There are throwable objects that are used to disrupt and change enemy behaviour patterns. Firearms can also be found on certain levels, they are used to shoot targets or obstacles from a distance.

Most levels have bonus objectives such as collecting a briefcase or finishing the level without killing anyone, completing these will reward the player with stars. Stars are used to unlock the next chapter of levels. The game launched with five different chapters, one of which was inspired by a level from Hitman: Blood Money. Post-launch, two additional chapters were added, one based upon a level from Hitman 2: Silent Assassin. The game features in-app purchases which provide hints to the puzzles or unlock level chapters immediately.

Hitman Go was developed by Canadian video game studio Square Enix Montréal. It is the first game from the developer, which was founded in late 2011 by employees of existing Square Enix Europe studios. Upon establishment, the studio announced that their first project would be a new video game in the Hitman franchise. The studio's original aspiration was creating triple-A console games within the series and expanding to a team size of 150 people. After a year, while the team was still expanding, the console game was cancelled and the studio shifted its focus to mobile games. This transition led to around one third of the staff leaving the development team.

During the concept phase there were four people working on Hitman Go. Initial prototypes were built on paper using printed out characters. The project was pitched and greenlit for production in mid 2013. Daniel Lutz served as creative director, and the team size peaked at eleven people throughout the remainder of the game's development. The studio looked at several different engines for building the game, but opted with Unity early on as it had a low barrier of entry, provided support for the main mobile platforms, and some members of the development team had previous experience creating projects in the game engine. An initial working prototype and a basic level editor were developed in a few days and after two weeks the first version of the game was presented to the remainder of the studio.