Emulated on MAME video games list, 'o'
| title | developer | year | platform | pop. | |||
|---|---|---|---|---|---|---|---|
| Off Road Challenge | Bally Midway | 1997 | Arcade | image | label | ||
| Off the Wall | Atari | 1991 | Arcade | label | |||
| Off the Wall | Sente | 1984 | Arcade | image | subject | label | |
| Oh My God! | Atlus | 1993 | Arcade | image | label | ||
| Oishii Puzzle Ha Irimasenka | Sunsoft;Atlus | 1993 | Arcade | image | label | ||
| Ojanko Club | Video System | 1986 | Arcade | image | label | ||
| Ojanko High School | Video System | 1988 | Arcade | label | |||
| Ojanko Yakata | Video System | 1986 | Arcade | image | label | ||
| Ojanko Yakata 2bankan | Video System | 1987 | Arcade | image | label | ||
| Ojousan | Nichibutsu | 1987 | Arcade | image | label | ||
| Omega Fighter | UPL | 1989 | Arcade | image | label | ||
| Omega Race | Bally Midway | 1981 | Arcade | image | subject | label | |
| One + Two | Barko | 1997 | Arcade | label | |||
| Onna Sanshirou: Typhoon Gal | Taito | 1985 | Arcade | image | label | ||
| Open Ice | Williams | 1995 | Arcade | image | label | ||
| Operation Ragnarok | NMK | 1995 | Neo-Geo | image | label | ||
| Operation Thunderbolt | Taito | 1988 | Arcade | image | subject | label | |
| Operation Wolf | Taito | 1987 | Arcade | image | label | ||
| Orange Club - Maruhi Kagai Jugyou | Daiichi Denshi | 1987 | Arcade | image | label | ||
| Orange Club - Maruhi Kagai Jugyou | Daiichi Denshi | 1987 | Arcade | label | |||
| Orbit | Atari | 1978 | Arcade | image | label | ||
| Orbitron | Signatron USA | 1982 | Arcade | image | label | ||
| Orbs | Sammy | 1994 | Arcade | image | label | ||
| Ordyne | Namco | 1988 | Arcade | image | label | ||
| Oriental Legend 2 | I.G.S. | 2008 | Arcade | image | label | ||
| Osman | Mitchell | 1996 | Arcade | image | label | ||
| Otenami Haiken | Success | 1999 | Arcade | image | label | ||
| Otenami Haiken Final | Success | 2005 | Arcade | image | label | ||
| Othello | Success;Tsukuda Original | 1984 | Arcade | image | label | ||
| Othello Derby | Sunwise | 1995 | Arcade | image | label | ||
| Othello Shiyouyo | Success | 1998 | Arcade | image | label | ||
| Out Run | AM2 | 1986 | Arcade | image | subject | label | |
| Outlaws of the Lost Dynasty | Data East | 1995 | Arcade | image | label | ||
| OutRunners | Sega | 1993 | Arcade | image | label | ||
| Outzone | Toaplan | 1990 | Arcade | image | subject | label | |
| Ozma Wars | SNK | 1979 | Arcade | image | label | ||
| Ozon I | Proma | 1983 | Arcade | image | label | ||