| Sega ST-V cart. |  Othello Shiyouyo | 1998 | Success Japan |
| Nintendo Game Boy Cart. | Ottos Ottifanten - Baby Brunos Alptraum Model DMG-AQBP-NOE | 1998 | Infogrames Distribution 014762 |
| Sega Saturn CD | Ousama Game | 1998 | Societa Daikanyama |
| PC/MS-Windows CD | Outwars | 1998 | Microsoft |
| Sony PlayStation CD |  Over Drivin' III - Hot Pursuit taikenban Model SLPM-80298 | 1998 | Electronic Arts Victor, Inc. Japan |
| Sony PlayStation CD |  Over Drivin' III - Hot Pursuit Model SLPS-01593 | 1998 | Electronic Arts Victor, Inc. Japan |
| Sony PlayStation CD | OverBlood 2 - Special Movie-ban Model SLPM-80258 | 1998 | Riverhill Soft. Japan |
| Sony PlayStation CD | OverBlood 2 Model SLPS-01261~2 | 1998 | Riverhill Soft. Japan |
| Amstrad CPC 464 disk | OVL '96 Hb | 1998 | Unknown |
| NEC PC-9801 Series 5.25in. disk | P-Fight! 18 | 1998 | T&H Project |
| Phillips CD-i disc | P.A.W.S. - Personal Automated Wagging System | 1998 | Philips Interactive Media, Inc. |
| Thomson MO5 cass. | Pac-man | 1998 | Coulom, Remi |
| Amstrad CPC 464 disk | Pac-Man Alpha Hb | 1998 | Unknown Spain |
| Sony PlayStation CD | Pachi-Slot Kanzen Kaiseki - Wai Wai Pulsar + 77 Model SLPS-01308 | 1998 | Human Ent. Japan |
| Sony PlayStation CD | Pachi-Slot Kanzen Kouryaku - Universal Koshiki Guide Volume 3 Model SLPS-01550 | 1998 | Syscom Ent. Japan |
| Nintendo 64 cart. | Pachinko 365 Nichi Model NUS-NPCJ | 1998 | Seta Co., Ltd. Japan |
| Nintendo Game Boy Cart. | Pachinko CR Daiku no Gen-san GB Model DMG-AKZJ-JPN | 1998 | Telenet Japan |
| Sony PlayStation CD | Pachinko Hall - Shinsou Daikaiten Model SLPS-01089 | 1998 | Nexton Co., Ltd. Japan |
| Sega Saturn CD | Pachinko Hall Shinsou Dai Kaiten | 1998 | Electronic Arts Victor, Inc. Japan |
| Arcade Video game | Pachinko Sexy Reaction 18 | 1998 | Sammy Corp. Japan |
| Arcade Video game | Packy | 1998 | Taito Corp. Japan |
| PC/MS-Windows CD | Pajama Sam 2 - Thunder and Lightning aren't so Frightening | 1998 | Humongous Ent., Inc. |
| Arcade Video game | Panic Park | 1998 | NAMCO, Ltd. Japan |
| PC/MS-Windows CD | Panzer Commander | 1998 | SSI Strategic Simulations, Inc. 16685 |
| Sega Saturn CD | Panzer Dragoon Saga Model 81307 | 1998 | SEGA Enterprises, Ltd. Tokyo, Japan |
| Sega Saturn CD | Panzer Dragoon Saga Model MK-81307-50 | 1998 | SEGA Enterprises, Ltd. Tokyo, Japan |
| Pachinko | Pao Pao Circus | 1998 | Daiichi Denshi |
| Redemption mechanical game | Pao Pao Shower | 1998 | Sigma Enterprises, Inc. Tokyo, Japan |
| PC/MS-Windows CD | Paradise Heights 2 | 1998 | Foster Japan |
| Sony PlayStation CD | Paranoia Scape Model SLPS-01375 | 1998 | Mathilda |
| Sony PlayStation CD | Parasite Eve Model SLPS-01230~1 | 1998 | Square Co., Ltd. Japan |
| Sony PlayStation CD | Parasite Eve Model SLUS-00662/00668 | 1998 | Square Electronic Arts L.L.C. |
| Sony PlayStation CD | Parlor Station Model SLPS-01539 | 1998 | GMF |
| Sony PlayStation CD | Parlor! Pro 3 Model SLPS-01453 | 1998 | Telenet Japan |
| Sony PlayStation CD | Parlor! Pro 4 Model SLPS-01646 | 1998 | Telenet Japan |
| Slot Machine | Pasa | 1998 | Bally Wulff |
| Arcade Video game | Pasha Pasha 2 | 1998 | Dongsung Wonder Park |
| PC/MS-Windows CD | Pastel Chime | 1998 | Alicesoft Japan |
| Sony PlayStation CD | Patlabor - The Game Taikenban Ver. 1.0 Model SLPS-01804 | 1998 | Bandai Visual Co., Ltd. |
| Fruit Machine | Pay Roll Casino Model 7015 | 1998 | Mazooma Games |
