Othello Derby (Japan) MAME 2003 Plus GAME ROM ISO

Oni 4 – Kishin No Ketsuzoku (Japan) Gameboy GAME ROM ISO

Oriental Legend Super (V101, Korea) [Imperfect Protection Emulation] Arcade GAME ROM ISO

Over Horizon (Europe) Nintendo GAME ROM ISO

Oshaberi Inco Club (Chakky) (Japan) Gameboy Advance GAME ROM ISO

Oigas (bootleg) MAME 2003 Plus GAME ROM ISO

One On One By Angelino (Basketball Hack) (USA) Atari 2600 GAME ROM ISO

Owarai Yowiko No Game-dou – Oyaji Sagashite Sanchoume (Japan) Gameboy Color GAME ROM ISO

Omidar.Profiteam (USA) Commodore 64 GAME ROM ISO

Ookami To Koushinryou – Umi Wo Wataru Kaze (JP)(Tashiro) (USA) Nintendo DS GAME ROM ISO

Opa Opa (MC-8123, 317-0042) Arcade GAME ROM ISO

Outzone (USA) Amiga 500 GAME ROM ISO