Sleeping Dogs (2012) is widely regarded as one of the most underrated open-world action games of the seventh generation. With its intense martial arts combat, gripping undercover cop storyline set in Hong Kong, and excellent driving mechanics, it carved out a unique space, often compared to the Grand Theft Auto series but with a stronger focus on hand-to-hand combat.
Sleeping Dogs (PC/PS3 version) requires:
It sounds like you’re looking for the , specifically for the PPSSPP emulator (the PSP version), and possibly with the word "new" meaning either a new playthrough, a new discovery, or a new port/mod.
The game does not exist on PSP, and no legitimate emulator will run it. Any download promising it is likely a virus or a bait-and-switch.