| Operation Darkness
| 4944076004226 | X4X-00002 | 2007-10-11
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| OutRun2
| 4974365880163 | V3N-00001 | 2004-10-1
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| Over the Hedge: Hammy Goes Nuts
| 047875816435 | ULUS-10187 | 2006-11-17
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| Online Chess Kingdoms
| 083717260202 | ULUS-10179 | 2006-11-28
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| Open Season
| 008888333135 | ULUS-10152 | 2006-9-19
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| OutRun 2006: Coast 2 Coast
| 010086660036 | ULUS-10064 | 2006-4-25
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| Ore no Dungeon
| 4974365900236 | ULJM-05167 | 2006-11-30
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| Ooedo Senryoubako
| 4988611206089 | ULJM-05099 | 2006-2-23
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| Ordyne
| 092218000583 | TGX040022 | 1990-0-0
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| Olympic IQ
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| Olympic Gold: Barcelona '92
| 743175790160 | T-79016 | 1992-0-0
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| Out of this World
| 052145820036 | T-70106 | 1991-0-0
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| Onsei Ninshiki Mahjong: Jarman
| 4939915000453 | T-43401M | 2000-8-31
|
| Ouka Houshin
| 4520923010031 | T-38704M | 1999-12-16
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| O-to-i-re: Dreamcast Sequencer
| 4516259000204 | T-32801M | 1999-12-9
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| Omoide ni Kawaru-Kun: Memories Off
| 4933516206214 | T-19718M | 2002-11-28
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| Orange Pocket
| 4988658031101 | T-18708M | 2004-4-28
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| Orange Pocket (Limited Edition)
| 4988658031095 | T-18707M | 2004-4-28
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| Ogre Battle: The March of the Black Queen
| 719631000142 | SNS-OB-USA | 1995-5-0
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| Obscure: The Aftermath
| 893384000403 | SLUS-21709 | 2008-3-25
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| Odin Sphere
| 730865530236 | SLUS-21577 | 2007-5-22
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| Open Season
| 008888323136 | SLUS-21467 | 2006-9-19
|
| Onimusha: Dawn of Dreams
| 013388260607 | SLUS-21362 | 2006-3-7
|
| Over the Hedge
| 047875814516 | SLUS-21300 | 2006-5-9
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| OutRun 2006: Coast 2 Coast
| 010086630909 | SLUS-21274 | 2006-4-25
|
| Outlaw Tennis
| 710425275807 | SLUS-21190 | 2005-7-26
|
| Okami
| 013388260591 | SLUS-21115 | 2006-9-19
|
| Outlaw Volleyball Remixed
| 780332061749 | SLUS-21049 | 2005-5-17
|
| Outlaw Golf 2
| 710425274466 | SLUS-21030 | 2004-11-9
|
| Obscure
| 625904457622 | SLUS-20777 | 2005-4-4
|
| Onimusha: Blade Warriors
| 013388260287 | SLUS-20710 | 2004-3-23
|
| Onimusha 3: Demon Siege
| 013388260249 | SLUS-20694 | 2004-4-27
|
| Onimusha 2: Samurai's Destiny
| 013388260096 | SLUS-20393 | 2002-8-27
|
| Oni
| 710425270536 | SLUS-20064 | 2001-1-30
|
| Onimusha: Warlords
| 013388260010 | SLUS-20018 | 2001-3-14
|
| Orphen: Scion of Sorcery
| 047875800212 | SLUS-20011 | 2000-10-26
|
| Ogre Battle
| 730865510054 | SLUS-00467 | 1997-11-17
|
| Oumagatoki 2 (PSOne Books)
| 4988110021480 | SLPS-91522 | 2003-12-11
|
| Oumagatoki (PSOne Books)
| 4988110021473 | SLPS-91521 | 2003-12-11
|
| OverBlood 2 (PlayStation the Best)
| 4967652101492 | SLPS-91140-1 | 1999-6-3
|
| Option Tuning Car Battle (PlayStation the Best)
| 4536478000021 | SLPS-91037 | 1998-10-8
|
| OverBlood: 3D Active Adventure (PlayStation the Best)
| 4967652101386 | SLPS-91032 | 1997-6-27
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| Orange Honey: Boku wa Kimi ni Koishiteru (Best Collection)
| 4535506300898 | SLPS-25859 | 2008-4-24
|
| Ore no Shite Agake
| 4527823994386 | SLPS-25796 | 2007-6-21
|
| Orange Honey: Boku wa Kimi ni Koishiteru
| 4988110022562 | SLPS-25767 | 2007-4-26
|
| Orange Honey: Boku wa Kimi ni Koishiteru (Limited Edition)
| 4988110022708 | SLPS-25766 | 2007-4-26
|
| One Piece: Pirates Carnival
| 4543112378910 | SLPS-25576 | 2005-11-23
|
| Onmyou Taisenki: Hasha no In
| 4543112341570 | SLPS-25501 | 2005-6-23
|
| One Piece Grand Battle! Rush
| 4543112328366 | SLPS-25473 | 2005-3-17
|
| Ougon Kishi Garo
| 4582224491056 | SLPS-20463 | 2006-4-20
|