'Sleeping Dogs: Definitive Editon' is set for October 14th in North America on the PS4 and Xbox One, but somehow the game has snuck out on PC today. The "The Definitive Edition" PC version has been contested to this point, but as released, it contains 24 previously available DLC components "built into the game" in addition to new texture and UI work, breakable objects, rebalanced missions, and a mess of cosmetic enhancements. This version also includes a downloadable art book. For those who own the original PC release, the new version can be had for $15, and that's regardless of prior DLC purchases.
You can find the latest info on 'Sleeping Dogs: Definitive Edition' linked from our Video Game Release Schedule.