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Sleeping Dogs is an action-adventure video game developed by United Front Games and published by Square Enix. It was released for PlayStation 3, Xbox 360 and Windows in 2012. Set in contemporary Hong Kong, the story follows martial artist and undercover police officer Wei Shen who infiltrates the Sun On Yee Triad organization. Gameplay focuses on Wei Shen's martial arts moves, fighting, shooting and parkour abilities, and on gadgets that can be used for combat and exploration. Players must complete missions to unlock content and continue the story, but they may instead freely roam the game's open world environment and engage in both legal and criminal activities. The latter may incite a police response, the intensity of which is controlled by a "heat" system. Actions such as fighting, driving and racing grant Shen statistical rewards and earn the player achievements.

Sleeping Dogs' difficult and prolonged development began in 2008. The game was announced in 2009 as part of the True Crime series but was canceled by Activision Blizzard in 2011, as a result of the project's delays and budget issues. Six months later, Square Enix purchased the publishing rights and renamed the game Sleeping Dogs, without the True Crime license, but considered a spiritual successor. During development, United Front staff visited Hong Kong to conduct field research for the visual environments and sound. Square Enix London Studios worked with United Front for the development.