Region | Title | System | Version | Edition | Languages | Serial | Status |
| Oookuki 大奥記 | PS2 | 1.02 | Original | | SLPM 66441 | |
| Odin Sphere オーディン・スフィア | PS2 | 1.02 | Original, PlayStation 2 the Best | | SLPM 66474 … | |
| Otome no Jijou 乙女の事情 | PS2 | 1.01 | Original | | SLPM 66508 | |
| OutRun 2 SP アウトラン2 スペシャルツアーズ | PS2 | 1.03 | Shokai Genteiban | | SLPM 66628 | |
| Ojousama Kumikyoku: Sweet Concert お嬢様組曲 -Sweet Concert- | PS2 | 1.01 | Special Pack-ban | | SLPM 66726 | |
| Ouran Koukou Host Club 桜蘭高校ホスト部 | PS2 | 1.01 | Genteiban | | SLPM 66737 | |
| Ouran Koukou Host Club 桜蘭高校ホスト部 | PS2 | 1.01 | Original | | SLPM 66738 | |
| Onimusha: Warlords | PS2 | 1.00 | Original | | SLPM 67507 | |
| Only You: Rebel Cross Only You リベルクルス | PS2 | 1.03 | Original, Drama CD Tsuki | | SLPS 25150 … | |
| Omoide ni Kawaru Kimi: Memories Off 想い出にかわる君 -Memories Off- | PS2 | 1.01 | Original | | SLPS 25173 | |
| One Piece: Grand Battle! 3 ONE PIECE グランドバトル!3 | PS2 | 1.02 | Original | | SLPS 25315 | |
| One Piece: Round the Land! ワンピース ランドランド! | PS2 | 1.01 | Original | | SLPS 25382 | |
| One Piece: Grand Battle! Rush ワン・ピース ~グラバト!ラッシュ~ | PS2 | 1.01 | Original | | SLPS 25473 | |
| Onmyou Taisenki: Hasha no In 陰陽大戦記 ~覇者の印~ | PS2 | 1.03 | Original | | SLPS 25501 | |
| One Piece: Pirates Carnival ワンピース パイレーツカーニバル | PS2 | 1.01 | Original | | SLPS 25576 | |
| One Piece: Pirates Carnival ワンピース パイレーツカーニバル | PS2 | 1.01 | Multi Tap (SCPH-10090) Doukonban | | SLPS 25583 | |
| One Piece: Pirates Carnival ワンピース パイレーツカーニバル | PS2 | 1.01 | Multi Tap (SCPH-70120) Doukonban | | SLPS 25584 | |
| Orange Honey: Boku wa Kimi ni Koi shiteru オレンジ♥ハニー 僕はキミに恋してる | PS2 | 1.02 | Shokai Genteiban | | SLPS 25766 | |
| Orange Honey: Boku wa Kimi ni Koi shiteru オレンジ♥ハニー 僕はキミに恋してる | PS2 | 1.02 | Original, Best Collection | | SLPS 25767 … | |
| Ore no Shita de Agake 俺の下で AGAKE | PS2 | 1.01 | Original | | SLPS 25796 | |
| The Operative: No One Lives Forever | PS2 | 1.50 | Original | | SLUS 20028 | |
| ObsCure | PS2 | 1.00 | Original | | SLUS 20777 | |
| Outlaw Golf 2 | PS2 | 1.02 | Original | | SLUS 21030 | |
| Outlaw Volleyball Remixed | PS2 | 1.02 | Original | | SLUS 21049 | |
| Ōkami | PS2 | 1.01 | Original, Greatest Hits | | SLUS 21115 … | |
| Outlaw Tennis | PS2 | 1.01 | Original | | SLUS 21190 | |
| OutRun 2006: Coast 2 Coast | PS2 | 1.01 | Original | | SLUS 21274 | |
| Open Season | PS2 | 1.01 | Original | | SLUS 21467 | |
| Odin Sphere | PS2 | 1.00 | Original, Greatest Hits | | SLUS 21577 … | |
| Orphen: Scion of Sorcery | PS2 | 1.00 | Original | | SLUS-20011 | |
| Onimusha: Warlords | PS2 | 1.00 | Original, Greatest Hits | | SLUS-20018 … | |
| Onimusha 2: Samurai's Destiny | PS2 | 1.03 | Original | | SLUS-20393 | |
| Onimusha 3: Demon Siege | PS2 | 1.01 | Original | | SLUS-20694 | |
| Onimusha: Blade Warriors | PS2 | 1.01 | Original | | SLUS-20710 | |
| Onimusha: Dawn of Dreams (Disc 1) | PS2 | 1.02 | Original | | SLUS-21180 | |
| Onimusha: Dawn of Dreams (Disc 2) | PS2 | 1.02 | Original | | SLUS-21362 | |
| ObsCure: The Aftermath | PS2 | 1.00 | Original | | SLUS-21709 | |
| Odin Sphere | PS2 | 1.00 | Trade Demo | | SLUS-28065 | |
| Official Xbox Magazine Game Disc 54e | XBOX360 | | | | SQ-2002 | |
| Outlaw Volleyball アウトローバレーボール | XBOX | | World Collection | | SS-003 | |
| Outlaw Volleyball 아웃로 발리볼 | XBOX | | Original | | SS-003 | |
| Outlaw Volleyball | XBOX | | Original | | SS-003 | |
| Outlaw Volleyball: Red Hot | XBOX | | Original | | SS-003 | |
| Outlaw Golf: Holiday Golf | XBOX | | Original | | SS-005 | |
| Outlaw Golf: 9 More Holes of X-Mas | XBOX | | Original | | SS-006 | |
| Outlaw Volleyball | XBOX | | Original | | SS-007 | |
| Operation Darkness オペレーション・ダークネス | XBOX360 | | Original | | SU-2001 | |
| OutRun 2006: Coast 2 Coast | PC | | Gamer's Choice | | THQ70690 | |
| Over G Fighters | XBOX360 | | Original | | TI-2001 | |
| Over G: Energy Airforce | XBOX360 | | Original | | TI-2001 | |
| Outlaw Golf | XBOX | | Original | | TM-006 | |
| Outlaw Golf | XBOX | | Original | | TM-006 | |
| The Outfit | XBOX360 | | Original | | TQ-2002 | |
| The Outfit | XBOX360 | | Original | | TQ-2002 | |
| OutRun 2006: Coast 2 Coast | PC | | eXtra Klasyka XK HIT | | TS OCC PL | |
| Outlaw Golf 2 | XBOX | | Original | | TT-023 | |
| Outlaw Golf 2 | XBOX | | Original | | TT-023 | |
| Outlaw Tennis | XBOX | | Original | | TT-118 | |
| Outlaw Tennis | XBOX | | Original | | TT-118 | |
| The Orange Box (Disc 1) 戰慄時空2:二部曲重裝旗艦版 | PC | | Original | | TTE0193 | |
| The Orange Box (Disc 2) 戰慄時空2:二部曲重裝旗艦版 | PC | | Original | | TTE0193 | |
| Ore no Shikabane o Koete Yuke 俺の屍を越えてゆけ | PSP | 1.01 | Original, Fukkatsu Kinen Genteiban | | UCJS 10116 … | |
| OutRun 2006: Coast 2 Coast | PSP | 1.01 | Original, Platinum: The Best of PSP | | ULES-00262 | |
| Open Season | PSP | 1.01 | Original | | ULES-00507 | |
| Open Season | PSP | 1.00 | Original, PSP Essentials | | ULES-00508 … | |
| Online Chess Kingdoms | PSP | 1.02 | Original | | ULES-00570 | |
| Off Road | PSP | 1.01 | Original | | ULES-00963 | |
| ObsCure: The Aftermath | PSP | 1.01 | Original | | ULES-01340 | |
| Oblachno, vozmozhny osadki v vide frikadelek Облачно, возможны осадки в виде фрикаделек | PSP | 1.00 | Original | | ULES-01361 | |
| Ooedo Senryoubako 大江戸千両箱 | PSP | 1.01 | Original | | ULJM 05099 | |
| Ookami Kakushi おおかみかくし | PSP | 1.04 | Original | | ULJM 05413 | |
| Onore no Shinzuru Michi o Yuke 己の信ずる道を征け | PSP | 1.01 | Original | | ULJM 05465 | |
| Otome wa Oanesama Boku ni Koi Shiteru Portable 乙女はお姉さまに恋してる Portable | PSP | 1.02 | Original | | ULJM 05647 | |
| O.G.A Onigokko Royal: Hunter wa Field de Koi o Suru O*G*A 鬼ごっこロワイアル ハンターは孤島(フィールド)で恋をする | PSP | 1.01 | Genteiban | | ULJM 06298 | |
| Omerta: Chinmoku no Okite: The Legacy オメルタ ~沈黙の掟~ THE LEGACY | PSP | 1.01 | Shokai Goukaban | | ULJM 06393 | |
| Oretachi no Sabage Portable 俺たちのサバゲー PORTABLE | PSP | 1.03 | Original | | ULJS 00170 | |
| Ore no Imouto ga Konna ni Kawaii wake ga Nai Portable 俺の妹がこんなに可愛いわけがない ポータブル | PSP | 1.01 | Original, Limited Edition | | ULJS 00356 … | |
| Ore no Imouto Maker EX: Imouto to Koishiyo Portable 俺の妹めいかあEX いもうとと恋しよっ ぽ~たぶる | PSP | 1.01 | Limited Edition | | ULJS 00357 | |
| Ore no Imouto ga Konna ni Kawaii Wake ga Nai Portable ga Tsuzuku Wake ga Nai (Disc 1) 俺の妹がこんなに可愛いわけがない ポータブル が続くわけがない | PSP | 1.00 | Original, PSP the Best, Tokusou-ban | | ULJS 00490 … | |
| Ore no Imouto ga Konna ni Kawaii Wake ga Nai Portable ga Tsuzuku Wake ga Nai (Disc 2) 俺の妹がこんなに可愛いわけがない ポータブル が続くわけがない | PSP | 1.00 | Original, PSP the Best, Tokusou-ban | | ULJS 00491 … | |
| One Piece: Romance Dawn: Bouken no Yoake ワンピース ROMANCE DAWN 冒険の夜明け | PSP | 1.01 | Original | | ULJS 00550 … | |
| Oh's Talk English (Disc 1) 오석태의 말하는 영어 | PSP | 1.02 | Original | | ULKS 46082 | |
| Oh's Talk English (Disc 2) 오석태의 말하는 영어 | PSP | 1.02 | Original | | ULKS 46083 | |
| OutRun 2006: Coast 2 Coast | PSP | 1.00 | Original | | ULKS 46087 | |
| Open Season | PSP | 1.01 | Original | | ULUS 10152 | |
| Online Chess Kingdoms | PSP | 1.02 | Original | | ULUS 10179 | |
| OutRun 2006: Coast 2 Coast | PSP | 1.03 | Original | | ULUS-10064 | |
| ObsCure: The Aftermath | PSP | 1.00 | Original, Test Sample | | ULUS-10484 | |
| Open Season | XBOX | | Original | | US-097 | |
| Open Season | XBOX | | Original | | US-097 | |
| Open Season | XBOX360 | | Original | | US-2024 | |
| Open Season | XBOX360 | | Original, ESA Foundation Holiday Bundle | | US-2024 | |
| The Orange Box (Disc 1) | PC | | Original | | VAD07705811D | |
| The Orange Box (Disc 2) | PC | | Original | | VAD07705811D2 | |
| The Orange Box (Disc 2) | PC | | Original, EA Classics | | VAE07705811D2/ENG, VAE07707118D2/ENG, VAX07705811D2, VAX07705811D2/AUS | |
| The Orange Box (Disc 1) | PC | | Original | | VAI07705811D | |
| The Orange Box (Disc 2) | PC | | Original | | VAI07705811D2 | |
| The Orange Box (Disc 1) | PC | | Original | | VAX07705811D | |
| Outlaw Golf アウトローゴルフ | XBOX | | World Collection | | VU-016 | |
| Outlaw Golf | XBOX | | Original | | VU-016 | |
| Outlaw Golf: 9 Holes of X-Mas | XBOX | | Original | | VU-027 | |
| Obut Pétanque 2 | XBOX360 | | Original | | W6-2008 | |
| Otogi 오토기 | XBOX | | Original | | YB-002 | |