Sleeping Dogs is an open-world action-adventure set in Hong Kong where you play as undercover cop Wei Shen, infiltrating the Sun On Yee Triad organization. You take down rival gangs, complete heists, and rise through the criminal ranks while struggling to maintain your identity as a cop. The game emphasizes brutal hand-to-hand combat with martial arts, environmental takedowns, and a fluid mix of fighting, shooting, driving, and parkour across a dense, living city.