| Game Name | System |
|---|
| Olympic Summer Games (USA, Europe) | Genesis |
| On Dal Jang Goon (Korea) | Genesis |
| Ooze, The (Europe) | Genesis |
| Ooze, The (Japan, USA) | Genesis |
| Operation Europe - Path to Victory 1939-45 (USA) | Genesis |
| Osomatsu-kun - Hachamecha Gekijou (Japan) | Genesis |
| Ottifants, The (Europe) | Genesis |
| Ottifants, The (Germany) (Beta) | Genesis |
| Out of This World (USA) | Genesis |
| OutRun (Japan) | Genesis |
| OutRun (USA, Europe) | Genesis |
| OutRun 2019 (Europe) | Genesis |
| OutRun 2019 (Japan) | Genesis |
| OutRun 2019 (USA) | Genesis |
| OutRun 2019 (USA) (Beta) | Genesis |
| OutRunners (Japan) | Genesis |
| OutRunners (USA) | Genesis |
| Outlander (Europe) | Genesis |
| Outlander (USA) | Genesis |
| PGA European Tour (USA, Europe) | Genesis |
| PGA Tour 96 (USA, Europe) | Genesis |
| PGA Tour Golf (USA, Europe) (v1.1) | Genesis |
| PGA Tour Golf (USA, Europe) (v1.2) | Genesis |
| PGA Tour Golf II (Japan) | Genesis |
| PGA Tour Golf II (USA, Europe) | Genesis |
| PGA Tour Golf II (USA, Europe) (v1.1) | Genesis |
| PGA Tour Golf III (USA, Europe) | Genesis |
| Pac-Attack (USA) | Genesis |
| Pac-Man 2 - The New Adventures (USA) | Genesis |
| Pac-Mania (USA, Europe) | Genesis |
| Pachinko Kuunyan (Japan) | Genesis |
| Pacific Theater of Operations (USA) | Genesis |
| Pagemaster, The (Europe) | Genesis |
| Pagemaster, The (USA) | Genesis |
| Pagemaster, The (USA) (Beta) | Genesis |
| Panorama Cotton (Japan) | Genesis |
| Paperboy (Japan) | Genesis |
| Paperboy (USA, Europe) | Genesis |
| Paperboy 2 (USA, Europe) | Genesis |
| Party Quiz Mega Q (Japan) | Genesis |
| Pat Riley Basketball (USA) | Genesis |
| Pebble Beach Golf Links (Europe) | Genesis |
| Pebble Beach Golf Links (USA) | Genesis |
| Pele II - World Tournament Soccer (USA, Europe) | Genesis |
| Pele! (USA, Europe) | Genesis |
| Pepenga Pengo (Japan) | Genesis |
| Pete Sampras Tennis (Europe) (Beta) | Genesis |
| Pete Sampras Tennis (USA, Europe) (J-Cart) | Genesis |
| Pete Sampras Tennis (USA, Europe) (J-Cart) (MDSTEE 13) | Genesis |
| Phantasy Star - Sennenki no Owari ni (Japan) | Genesis |
| Phantasy Star II (Brazil) | Genesis |
| Phantasy Star II (USA, Europe) (Rev A) [En by Naflign v1.0] | Genesis |
| Phantasy Star II (USA, Europe) (v1.1) | Genesis |
| Phantasy Star II (USA, Europe) (v1.2) | Genesis |
| Phantasy Star II (USA, Europe) [En by Naflign v1.0] | Genesis |
| Phantasy Star II (USA, Europe) [Hack by Komrade v1.02] (~Phantasy Star - Evil Overload) (Numan Revolution Hard Mode) | Genesis |
| Phantasy Star II (USA, Europe) [Hack by Komrade v1.1] (~Phantasy Star - Numan Revolution) | Genesis |
| Phantasy Star II - Anne's Adventure (Japan) (SegaNet) [En by MIJET v20071024] | Genesis |
| Phantasy Star II - Huey's Adventure (Japan) (SegaNet) [En by MIJET v20081106] | Genesis |
| Phantasy Star II - Kaerazaru Toki no Owari ni (Japan) | Genesis |
| Phantasy Star II - Kinds's Adventure (Japan) (SegaNet) [En by MIJET v20081213] | Genesis |
| Phantasy Star II - Shilka's Adventure (Japan) (SegaNet) [En by MIJET v20080628] | Genesis |
| Phantasy Star III - Generations of Doom (Brazil) | Genesis |
| Phantasy Star III - Generations of Doom (USA, Europe) | Genesis |
| Phantasy Star III - Toki no Keishousha (Japan) | Genesis |
| Phantasy Star IV (USA) | Genesis |
| Phantasy Star IV (USA) [Bug Fix by Sixfortyfive v1.0] (Level 99 Fix) | Genesis |
| Phantasy Star IV (USA) [Hack by Komrade v1.4] (Purgatory Mode) | Genesis |
| Phantasy Star IV (USA) [Hack by Komrade v1.4] (Purgatory Mode+Double EXP and Meseta) | Genesis |
| Phantasy Star IV (USA) [Hack by Komrade v2.6] (Hell Mode) | Genesis |
| Phantasy Star IV (USA) [Hack by Komrade v2.6] (Hell Mode+Double EXP and Meseta) | Genesis |
| Phantasy Star IV (USA) [Hack by Sixfortyfive v1.0] (Arranged Version) | Genesis |
| Phantom 2040 (Europe) | Genesis |
| Phantom 2040 (USA) | Genesis |
| Phelios (Europe) | Genesis |
| Phelios (Japan) | Genesis |
| Phelios (USA) | Genesis |
| Pink Goes to Hollywood (USA) | Genesis |
| Pink Goes to Hollywood (USA) (Beta) | Genesis |
| Pinocchio (Europe) | Genesis |
| Pinocchio (USA) | Genesis |
| Pirates of Dark Water, The (USA) (January 1994) | Genesis |
| Pirates of Dark Water, The (USA, Europe) (May 1994) | Genesis |
| Pit-Fighter (World) (July 1991) | Genesis |
| Pit-Fighter (World) (October 1991) | Genesis |
| Pitfall - The Mayan Adventure (Europe) | Genesis |
| Pitfall - The Mayan Adventure (USA) | Genesis |
| Pocahontas (Europe) | Genesis |
| Pocahontas (USA) | Genesis |
| Populous (Europe) | Genesis |
| Populous (Japan) | Genesis |
| Populous (USA) | Genesis |
| Power Athlete (Japan) | Genesis |
| Power Drive (Europe) (En,Fr,De,Es,Pt) | Genesis |
| Power Monger (Japan) | Genesis |
| Power Monger (USA) | Genesis |
| Powerball (USA) | Genesis |
| Predator 2 (USA, Europe) | Genesis |
| Premier Manager (Europe) | Genesis |
| Premier Manager 97 (Europe) | Genesis |
