| Sega Genesis cart. |  Normy's Beach Babe-O-Rama Model 7204 | 1994 | Electronic Arts CA, USA 14633 |
| Sega Genesis cart. |  Nuclear Rush | 199? | FutureScape Productions |
| Sega Genesis cart. | Old Towers Hb | 2019 | RetroSouls |
| Sega Genesis cart. | Olympic Gold Model T-79016 | 1992 | US Gold, Inc. San Francisco, CA, USA 43175 |
| Sega Genesis cart. | Olympic Summer Games Model T-100116 | 1996 | Black Pearl |
| Sega Genesis cart. | Onslaught | 1991 | Ballistic |
| Sega Genesis cart. |  Operation Europe - Path to Victory 1939-45 | 1994 | KOEI Corp. CA, USA |
| Sega Genesis cart. | Out of This World Model T-70106 | 1993 | Virgin Games, Ltd. UK 013715 |
| Sega Genesis cart. | Out Run Model 1125 | 1991 | SEGA of America, Inc. San Francisco, CA, USA |
| Sega Genesis cart. | Outlander Model T-87036 | 1992 | Mindscape, Inc. Northbrook, IL, USA 24294 |
| Sega Genesis cart. | Outlaw Racing | 1994 | Artech Digital Ent. |
| Sega Genesis cart. | OutRun 2019 | 1993 | SEGA of America, Inc. San Francisco, CA, USA |
| Sega Genesis cart. | OutRunners Model T-13096 | 1994 | Data East USA, Inc. |
| Sega Genesis cart. | P.T.O. - Pacific Theater of Operations Model T-76056 | 1993 | KOEI Corp. CA, USA |
| Sega Genesis cart. | Pac-Attack Model T-14116 | 1993 | NAMCO Hometek, Ltd. USA |
| Sega Genesis cart. | Pac-Man 2 - The New Adventures Model T-14126 | 1994 | NAMCO Hometek, Ltd. USA |
| Sega Genesis cart. | Pac-Mania P | 1991 | Tengen, Inc. Milpilas, CA, USA |
| Sega Genesis cart. | Paperboy II | 1992 | Tengen, Inc. Milpilas, CA, USA |
| Sega Genesis cart. | Paperboy Model 301029-0150 | 1992 | Tengen, Inc. Milpilas, CA, USA |
| Sega Genesis cart. | Pat Riley Basketball | 1990 | SEGA of America, Inc. San Francisco, CA, USA |
| Sega Genesis cart. | Payne Stewart Pro Golf | 1994 | Time Warner Interactive |
| Sega Genesis cart. | Pebble Beach Golf Links Model 1231 | 1993 | SEGA of America, Inc. San Francisco, CA, USA |
| Sega Genesis cart. | Pelé! | 1993 | Accolade, Inc. San Jose, CA, USA 15605 |
| Sega Genesis cart. | Pelé's World Tournament Soccer | 1994 | Accolade, Inc. San Jose, CA, USA 15605 |
| Sega Genesis cart. | Pete Sampras Tennis | 1994 | Codemasters Soft. Co., Ltd., The 015026 |
| Sega Genesis cart. | PGA European Tour Model 7353 | 1994 | EA Sports |
| Sega Genesis cart. | PGA Tour 96 Model 7509 | 1995 | EA Sports |
| Sega Genesis cart. | PGA Tour Golf II for use with the Personal Trainer | 1995 | HeartBeat Corp. |
| Sega Genesis cart. | PGA Tour Golf II Model 7155 | 1992 | EA Sports |
| Sega Genesis cart. | PGA Tour Golf III Model 7427 | 1994 | EA Sports |
| Sega Genesis cart. | PGA Tour Golf Model 7002 | 1991 | Electronic Arts CA, USA 14633 |
| Sega Genesis cart. | Phantasy Star II | 1990 | SEGA of America, Inc. San Francisco, CA, USA |
| Sega Genesis cart. | Phantasy Star III - Generations of Doom Model 1303 | 1991 | SEGA of America, Inc. San Francisco, CA, USA |
| Sega Genesis cart. | Phantasy Star IV - The End of the Millennium Model 1307 | 1994 | SEGA of America, Inc. San Francisco, CA, USA |
| Sega Genesis cart. | Phantom 2040 Model T-139036 | 1995 | Viacom New Media Viacom International, Inc. |
| Sega Genesis cart. |  Phantom Gear demo | 2019 | Mega Cat Studios |
| Sega Genesis cart. | Phantom Gear demo | 2021 | Bits Rule Games |
| Sega Genesis cart. | Phelios Model 14016 | 1990 | NAMCO Hometek, Ltd. USA |
| Sega Genesis cart. | Pink Goes to Hollywood Model T-401046 | 1993 | TecMagik Ent., Ltd. |
| Sega Genesis cart. | Pinocchio | 1996 | T-HQ, Inc. Toy HeadQuarters |
