RetroArch has been released for PS2
The current stable is v1.7.6
The following systems are emulated via RetroArch 'cores'
- Nintendo NES
- SEGA Genesis
- SEGA GameGear
Around 2002 a port of the popular Snes9x was released by Hiryu for PS2 called SNESStation
This was more recently updated (2016) by SP193 at PSX-Place