The original Red Dead Redemption (the prequel to RDR2, but the first game in the series) is not on PSP, but you can play it on mobile via cloud streaming services like:
If you search for this term, you will likely find YouTube videos or websites claiming to have a download link. In almost every case, these links fall into three categories: Red Dead Redemption 2 Ppsspp Zip File Download
A few files are actually mods for Grand Theft Auto: San Andreas on PPSSPP. Some modders imported RDR2 character models (Arthur or John Marston) into GTA: Liberty City Stories. You will see Arthur Morgan, but the game is still GTA. It is not RDR2. The original Red Dead Redemption (the prequel to
While not a PSP option, if you are tech-savvy, you can run Grand Theft Auto V on high-end Android devices via Winlator (a Windows emulator for Android). There are popular mods that convert the entire map of Los Santos into a Western setting, allowing for a makeshift Red Dead experience. While not a PSP option, if you are