: A developer named xerpi ported the Play! emulator to the Vita. It exists as a VPK, but it is strictly a proof-of-concept that runs simple files (like the "teapot" demo) at roughly 1–5 FPS.
For games that haven't been ported, you can stream them from a more powerful machine: ps vita ps2 emulator vpk
If you want to play PS2-era games on your device, use these much more effective methods: Official Remasters and Ports : A developer named xerpi ported the Play