| Operation Europe: Path to Victory 1939-45
| 040198000727 | | 1994-0-0
|
| Operation Flashpoint (Game of the Year Edition)
| 767649400522 | | 2003-3-21
|
| Operation Flashpoint: Cold War Crisis
| 767649400218 | | 2001-8-30
|
| Operation Flashpoint: Gold Upgrade
| 767649400294 | | 2001-11-28
|
| Operation Flashpoint: Resistance
| 767649400416 | | 2002-7-10
|
| Operation Logic Bomb: The Ultimate Search & Destroy
| 032264700129 | | 1993-8-0
|
| Operation Secret Storm
| 096962810238 | OM-81023 | 1991-0-0
|
| Operation Shadow
| 758478516881 | | 2004-10-19
|
| Operation Thunderbolt
| 020588010215 | | 1994-6-0
|
| Operation Wolf
| 020588010086 | | 1989-0-0
|
| Operation: Desert Storm
| | | 1991-0-0
|
| Operation: Vietnam
| 096427014966 | | 2007-8-17
|
| The Operative: No One Lives Forever
| 024543009535 | | 2000-11-9
|
| The Operative: No One Lives Forever (Game of the Year Edition)
| 020626714037 | | 2001-10-5
|
| Operator's Side (Microphone Set)
| 4948872150385 | SCPS-15038 | 2003-1-30
|
| Opoona
| 040198001878 | | 2008-3-25
|
| Opoona
| 4988615026195 | RVL-P-RPOJ | 2007-11-1
|
| Option Tuning Car Battle
| 4536478000014 | SLPS-01207 | 1998-1-15
|
| Option Tuning Car Battle (PlayStation the Best)
| 4536478000021 | SLPS-91037 | 1998-10-8
|
| Option Tuning Car Battle 2
| 4907859108191 | SLPS-01857 | 1999-2-18
|
| Option Tuning Car Battle 2 (Race the Best Vol. 2)
| 4907859108221 | SLPS-02573 | 2000-2-3
|
| Option Tuning Car Battle Spec-R
| 4536478000083 | SLPS-02587 | 2000-5-11
|
| Option Tuning Car Battle Spec-R (Race the Best Vol. 2)
| 4536478000151 | SLPS-02951 | 2000-12-7
|
| Option Tuning Car Battle Spec-R (SuperLite 1500)
| 4944076002642 | SLPM-87164 | 2002-11-7
|
| Oracle no Houseki
| 4907940211441 | SLPS-00240 | 1996-12-6
|
| The Orange Box
| 014633098525 | | 2007-10-10
|
| The Orange Box
| 014633098518 | BLUS-30055 | 2007-12-11
|
| The Orange Box
| 014633098495 | | 2007-10-10
|
| Orange Honey: Boku wa Kimi ni Koishiteru
| 4988110022562 | SLPS-25767 | 2007-4-26
|
| Orange Honey: Boku wa Kimi ni Koishiteru (Best Collection)
| 4535506300898 | SLPS-25859 | 2008-4-24
|
| Orange Honey: Boku wa Kimi ni Koishiteru (Limited Edition)
| 4988110022708 | SLPS-25766 | 2007-4-26
|
| Orange Pocket
| 4988658031101 | T-18708M | 2004-4-28
|
| Orange Pocket (Limited Edition)
| 4988658031095 | T-18707M | 2004-4-28
|
| Orb-3D
| 087855000522 | | 1990-0-0
|
| Orcs & Elves
| 014633159189 | | 2007-11-13
|
| Ordyne
| 092218000583 | TGX040022 | 1990-0-0
|
| Ore no Dungeon
| 4974365900236 | ULJM-05167 | 2006-11-30
|
| Ore no Ryouri
| 4948872100991 | SCPS-10099 | 1999-9-9
|
| Ore no Ryouri (PlayStation the Best)
| 4948872912075 | SCPS-91207 | 2000-8-24
|
| Ore no Ryouri (PSOne Books)
| 4948872913232 | SCPS-91323 | 2002-3-28
|
| Ore no Sentouki
| 4988611206065 | NTR-P-AGWJ | 2006-4-27
|
| Ore no Shikabane o Koete Yuke
| 4948872100748 | SCPS-10074 | 1999-6-17
|
| Ore no Shikabane o Koete Yuke (Playstation the Best)
| 4948872911986 | SCPS-91198 | 2000-7-6
|
| Ore no Shikabane o Koete Yuke (PSOne Books)
| 4948872913300 | SCPS-91330 | 2004-10-28
|
| Ore no Shite Agake
| 4527823994386 | SLPS-25796 | 2007-6-21
|
| Ore no Yacht: Ganbare! Nippon Challenge
| 4904810560456 | SLPS-02132 | 1999-10-7
|
| Ore! Tomba
| 4535070000002 | SLPS-01144 | 1997-12-25
|
| Orega Kantoku Da! Gekitou Pennant Race
| 4988601003384 | SLPM-65005 | 2000-11-22
|
| The Oregon Trail
| | | 1997-0-0
|
| The Oregon Trail
| | | 1985-0-0
|