Action
Genre · 5,123 games · all platforms
| Game | Platform | Year |
|---|---|---|
| Operation Spacehog | MS-DOS | 2000 |
| Operation Starfi5h | Super Nintendo | 1994 |
| Operation Stealth | MS-DOS | 1990 |
| Operation Thunderbolt | Super Nintendo | 1994 |
| Operation Vulture | MS-DOS | 1992 |
| Operation Vulture III : Cyber Chopper | MS-DOS | 1995 |
| Operation Vulture IV : Escape From Station 7 | MS-DOS | 1996 |
| Operation Wolf | MS-DOS | 1989 |
| Operation Wolf | Master System | 1990 |
| Oraga Land Shusai - Best Farmer Shuukakusai | Super Nintendo | 1995 |
| Ordyne | PC Engine / TurboGrafx-16 | 1989 |
| Orion Odyssey : The Search For The Magic Ankh | MS-DOS | 1991 |
| Orion Project, The | MS-DOS | 1994 |
| Ortotris | MS-DOS | 1992 |
| Osarium | MS-DOS | 1998 |
| Osawagase! Penguin Boy | Game Boy | 1990 |
| Osbit | MS-DOS | 1988 |
| Oscar | Super Nintendo | 1996 |
| Oscar | MS-DOS | 1994 |
| Oshare Princess | Game Boy Advance | 2002 |
| Otoboke Ninja Colosseum | Super Nintendo | 1995 |
| Ouke no Tani - El Giza no Fuuin - Edit Contest Yuushuu Sakuhinshuu | MSX2 | 1988 |
| Outback Joey | Mega Drive | 1993 |
| Outer Ridge | MS-DOS | 1995 |
| Outer World | Super Nintendo | 1992 |
| Outlander | Super Nintendo | 1993 |
| Outlaw 1997 | MS-DOS | 1994 |
| Outlaw ~ Gunslinger | Atari 2600 | 1978 |
| Out 'm' Up | MS-DOS | 2000 |
| Out of Gas | Game Boy | 1992 |
| Out of This World | Windows 3.x | 1995 |
| Out Of This World | MS-DOS | 1991 |
| Out of This World + Helicopter Rescue | Magnavox Odyssey² | 1980 |
| Out on a LEM | MS-DOS | 1984 |
| Overdrive | MS-DOS | 1995 |
| Overkill | MS-DOS | 1996 |
| Overlord Maniac Car | MS-DOS | 1997 |
| Over The Net | MS-DOS | 1991 |
| Ovni | MS-DOS | 1991 |
| Owarai Yoiko no Geemumichi - Oyaji Sagashite 3 Choume | Game Boy Color | 1999 |
| Oxide | MS-DOS | 1998 |
| Oystron | Atari 2600 | 1998 |
| P | MS-DOS | 2013 |
| P-47 Freedom Fighter | MS-DOS | 1993 |
| P-47 Thunderbolt | ZX Spectrum | 1990 |
| P47 Thunderbolt | MS-DOS | 1990 |
| Pac | MS-DOS | 1992 |
| Pac 2000 | MS-DOS | 1996 |
| Pacamaze | MS-DOS | 1995 |
| Pacar | SG-1000 | 1984 |
| Pac-Gal | MS-DOS | 1982 |
| Pachinko | Magnavox Odyssey² | 1981 |
| Pacific Islands | MS-DOS | 1992 |
| Pac-In-Time | Super Nintendo | 1994 |
| Packman | MS-DOS | 1983 |
| Pack Rat, The | MS-DOS | 1992 |
| Pac-Land | ZX Spectrum | 1989 |
| Pac-Maine | MS-DOS | 1988 |
| Pac-Man | ColecoVision | 1984 |
| Pac-Man | Nintendo Entertainment System | 1993 |