The game casts players as Wei Shen, an undercover cop seeking to take down the Hong Kong Triads from the inside. As well as the gunplay and vehicles normally associated with open-world games, Square Enix also promises "one of the most intuitive and imaginitive combat systems," with hand-to-hand combat and what sound like Yakuza-style environmental takedowns.
United Front Games executive producer Stephen Van Der Mescht said: "Working on Sleeping Dogs has been such a huge passion for the team, and we're really pleased to be working with Square Enix London Studios.
"The extensive experience both our studios have in creating compelling open-world gameplay and rich and rewarding combat makes for a perfect partnership.Working together, we can make sure that Sleeping Dogs is the most intense and immersive experience it can be."
Sleeping Dogs will be released in the second half of this year for PS3, Xbox 360 and PC.