Outrun_europa (USA) Commodore 64 GAME ROM ISO

Operation Wolf 3 (Japan) Arcade GAME ROM ISO

Out Of This World (USA) Sega Genesis GAME ROM ISO

Operation_Neptun.Markt_und_Technik (USA) Commodore 64 GAME ROM ISO

Oils Well (1983)(Sierra On-Line)[t] (USA) Atari 800 GAME ROM ISO

Ochaken No Daibouken 2 – Yume Ippai No Omochabako (Japan) Nintendo DS GAME ROM ISO

Oriental Legend Special – Xi You Shi E Zhuan Super (ver. 103, China, Tencent) (unprotected) MAME 2003 Plus GAME ROM ISO

Omega MAME 2003 Plus GAME ROM ISO

Obscure- The Aftermath (USA) Nintendo Wii GAME ROM ISO

Olimpiada ’96_Disk1 (USA) Amiga 500 GAME ROM ISO

Olivia Pin Up SlideShow! (PD) (USA) Super Nintendo GAME ROM ISO

Ookami To Koushinryou – Boku To Holo No Ichinen (Navarac) (Japan) Nintendo DS GAME ROM ISO