One Piece – Nanatsu Shima No Daihihou (Cezar) (Japan) Gameboy Advance GAME ROM ISO

Otoboke Ninja Colosseum (Japan) Super Nintendo GAME ROM ISO

Ordyne (Japan) MAME 2003 Plus GAME ROM ISO

Omoide Ni Kawaru Kimi – Memories Off (Japan) Playstation Portable GAME ROM ISO

Official Rangers Football Club Game, The_Disk2 (USA) Amiga 500 GAME ROM ISO

Olympic Gold – Barcelona ’92 (Europe) Game Gear GAME ROM ISO

Ohasuta Yamachan & Raymond (Japan) Gameboy Color GAME ROM ISO

One Piece – Gigant Battle (Japan) Nintendo DS GAME ROM ISO

Ohanaya-san Ni Narou! (kaMX) (Japan) Gameboy Advance GAME ROM ISO

Over The Hedge – Hammy Goes Nuts! (Supremacy) (USA) Nintendo DS GAME ROM ISO

Off the Wall (2-player cocktail) MAME 2003 Plus GAME ROM ISO

Oil_Barons..ACT (USA) Commodore 64 GAME ROM ISO