They found that playing as a cat led to interesting level design opportunities, though they encountered challenges in balancing design and gameplay. The gameplay was inspired by the developers' cats, Murtaugh and Riggs, and the team studied images and videos of cats for research. Stray 's aesthetics were influenced by Kowloon Walled City, which the developers felt could be appropriately explored by a cat. They partnered with Annapurna Interactive to publish the game. The development began in 2015, led by BlueTwelve Studio founders Koola and Viv, who wanted to pursue an independent project after working at Ubisoft Montpellier. Throughout the game, the player must evade the antagonistic Zurks and Sentinels, which attempt to kill them. Using B-12, they can store items found throughout the world and hack into technology to solve puzzles.

The player traverses the game world by leaping across platforms and climbing up obstacles, and can interact with the environment to open new paths. The game is presented through a third-person perspective. The story follows a stray cat who falls into a walled city populated by robots, machines, and mutant bacteria, and sets out to return to the surface with the help of a drone companion, B-12. Stray is a 2022 adventure game developed by BlueTwelve Studio and published by Annapurna Interactive.

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