However, the premise of Red Dead Redemption running on PPSSPP is technically impossible. The PPSSPP emulator is designed exclusively to emulate the PlayStation Portable hardware. While the PSP was powerful for its time, its architecture is fundamentally different from the PlayStation 3. Red Dead Redemption was built on the RAGE engine, utilizing the complex Cell processor of the PS3 and the Xbox 360’s Xenon processor. These systems possessed vastly more RAM and processing power than the PSP.
If you want to play Red Dead Redemption on a handheld or mobile device, consider these official or working methods: red dead redemption ppsspp highly compressed