Sleeping Dogs is a 2012 action-adventure game developed by United Front Games and published by Square Enix. The game was released for PlayStation 3, Windows, and Xbox 360 in August 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.