There is of Sleeping Dogs. Any website claiming to offer a "Sleeping Dogs PPSSPP zip file" is either:
Sleeping Dogs is an action-adventure game developed by United Artists and released in 2012 for PlayStation 3, Xbox 360, and Microsoft Windows. The game received positive reviews for its engaging storyline, improved gameplay mechanics, and immersive open-world experience. Sleeping Dogs Ppsspp Zip File Download
If you specifically want to use the PPSSPP emulator, consider these legitimate PSP titles with similar open-world or martial arts gameplay: Grand Theft Auto: Liberty City Stories Vice City Stories : The gold standard for open-world crime on PSP. Kurohyō: Ryū ga Gotoku Shinshō (Yakuza: Black Panther) There is of Sleeping Dogs
If you want to play Sleeping Dogs or something similar on the go: Play the Definitive Edition on Steam Deck or via cloud gaming (Xbox Game Pass). Legit PSP Titles: Try GTA: Chinatown Wars or The Warriors for great open-world/brawler action. Mobile Ports: Look for Jade Empire for deep martial arts combat on mobile devices. If you specifically want to use the PPSSPP
If you want to play the real game, it is officially available on these platforms: