| Region | Title | System | Version | Edition | Languages | Serial | Status |
|---|
 | Ouran Koukou Host Club
桜蘭高校ホスト部 | PS2 | 1.01 | Original |  | SLPM 66738 |  |
| Ousama Monogatari
王様物語 | WII | | Beta | | | |
| Ousama Monogatari
王様物語 | WII | | Original | | RVL-RO3J-JPN-B0 | |
| Outer World
アウター・ワールド | 3DO | | Original |  | FZ-SJ3451 | |
| Outlaw Golf
アウトローゴルフ | XBOX | | World Collection | | VU-016 | |
| Outlaw Volleyball
アウトローバレーボール | XBOX | | World Collection | | SS-003 | |
| OutRun 2
アウトラン２ | XBOX | | Shokai Genteiban | | SE-054 | |
| 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 | ![2 and more dumps from original media [!]](/images/status/green.png "2 and more dumps from original media [!]") |
| Over Drivin' II
オーバードライビンⅡ | PSX | | Original | | SLPS 00895 | |
| Over Drivin' III: Hot Pursuit
オーバードライビンⅢ | PSX | | Original | | SLPS 01593 | |
| Over G: Energy Airforce | XBOX360 | | Original, Genteiban | | TI-2001 | |
| Over the Monochrome Rainbow featuring Shogo Hamada | PS2 | 1.40 | Original | | SLPM 65271 | |
| OverBlood
オーバーブラッド | PSX | | Major Wave | | SLPM 86641 | |
| Overlord
オーバーロード：魔王サマ復活の時 | XBOX360 | | Original | | CM-2050 | |
| Oyaji no Jikan: Nee-chan Tsuri Iku de!
おやじの時間 ね～ちゃん釣り行くで！ | PSX | | Original | | SLPS 02590 | |
| Oyako de Asobo: Miffy no Omochabako
おやこ で あそぼ ミッフィーの おもちゃばこ | WII | | Original | | RVL-R3UJ-JPN-B0 | |
| Oz
ＯＺ －オズ－ | PS2 | 1.02 | Original, Konami the Best | | SLPM 66033 … | |
| Oz no Mahoutsukai: Another World: Rung Rung
オズの魔法使い ～Ａｎｏｔｈｅｒ Ｗｏｒｌｄ～ ルングルング | PSX | | Original | | SLPS 02335 | |
 | One Piece: Kaizoku Musou
ワンピース 海賊無双 | PS3 | 01.02 | Original, Treasure Box | | BLAS 50450 … | |
 | 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 … | |
| Ookami: Zekkeiban
大神 絶景版 | PS3 | 00.00 | Original, PlayStation 3 the Best, PlayStation 3 the Best (Reprint) |   | BLJM 55061 … | |
 | Obscure II
옵스큐어 II | PS2 | 1.00 | Original | | SCKA 20114 | |
| Odin Sphere
오딘 스피어 | PS2 | 1.00 | Sample | | SCKA 20107 | |
| Oh Seoktae-ui Malhaneun Yeongeo (Disc 1)
오석태의 말하는 영어 | PSP | 1.02 | Original |  | ULKS 46082 | |
| Oh Seoktae-ui Malhaneun Yeongeo (Disc 2)
오석태의 말하는 영어 | PSP | 1.02 | Original | | ULKS 46083 | |
| Ōkami
오오카미 | PS2 | 1.00 | Original | | SCKA 20095 | |
| One Piece: Grand Adventure
원피스: 그랜드 배틀 어드벤처 | PS2 | 1.00 | Original | | SLKA 25388 | |
| One Piece: Grand Battle! Rush
원피스 그랜드배틀! RUSH | PS2 | 1.00 | Original | | SLKA 25299 | |
| One Piece: Pirates Carnival
원피즈 해적카니발 | PS2 | 1.01 | Original | | SLKA 25351 | |
| One Piece: Round the Land!
원피스 라운드 더 랜드! | PS2 | 1.00 | Original | | SLKA 25208 | |
| Onimusha: Warlords | PS2 | 1.00 | Original | | SLPM 67507 | |
| Operation Flashpoint: Dragon Rising
오퍼레이션 플래시포인트: 드래곤 라이징 | PS3 | 01.01 | Original |  | BLKS 20157 | |
| Otogi
오토기 | XBOX | | Original | | YB-002 | |
| Otostaz
오토스타츠 | PS2 | 1.01 | Original | | SCPS 56004 | |
| Outlaw Volleyball
아웃로 발리볼 | XBOX | | Original | | SS-003 | |
| OutRun 2006: Coast 2 Coast | PSP | 1.00 | Original | | ULKS 46087 | |
 | Official PlayStation 2 Magazine Demo 101
ops2m demo 101 eur | PS2 | 1.00 | | | SCED-55120 | |
| Official PlayStation 2 Magazine Demo 73
ops2m demo 73/benelux | PS2 | 1.00 | | | SCED-54176 | |
| De Ontdekker en het Mysterie van de Diamanten Scarabee
The Explorer and the Mystery of the Diamond Scarab | WII | | Original |  | RVL-SODP-EUR-B0 | |
 | Opowieści z Narnii: Książe Kaspian | PC | | Covermount |  | | |
| Opowieści z Narnii: Lew, Czarownica i stara szafa
The The Chronicles of Narnia: The Lion Witch and The Wardrobe | PC | | Dookoła Filmu | | P_17791_03A_PL | |
| Opowieści z Narnii: Lew, Czarownica i Stara Szafa | PS2 | 1.00 | Original | | SLES-53713 | |
| OutRun 2006: Coast 2 Coast | PC | | eXtra Klasyka XK HIT |  | TS OCC PL | |
| Overlord | PC | 1.2 | Original | | MOVL1CDPL00 (DVD), POVL1CDPL03 (Box) | |
| Overlord II | PC | | Original | | MOVL2CDPL00 | |
 | Official PlayStation 2 Magazine Demo 32
PlayStation 2 Revista Oficial: Portugal 9 | PS2 | 1.00 | | | SCED-51657 | |
| Official PlayStation 2 Magazine Demo 40
ops2m demo 40 | PS2 | 1.01 | | | SCED-52053 | |
| Official PlayStation 2 Magazine Demo 41
ops2m demo 41 | PS2 | 1.00 | | | SCED-52177 | |
| Official PlayStation 2 Magazine Demo 42
ops2m demo 42 | PS2 | 1.01 | | | SCED-52271 | |
| OutRun 2006: Coast 2 Coast | PC | | Top Games | | SEGA-PC029 | |
| Overlord
BGamer 153 (Side A) | PC | | Covermount | | | |
 | Obitaemyj ostrov
Обитаемый остров | PC | | Original |  | | |
| Obitaemyj ostrov: Chuzhoj sredi chuzhix
Обитаемый остров: Чужой среди чужих | PC | | Original | | | |
| Obitaemyj ostrov: Zemlyanin
Обитаемый остров: Землянин | PC | | Original | | | |
| Obitel' t'my: Sumerki
Обитель тьмы: Сумерки | PC | 1.1 | Original | | | |
| Oblachno, vozmozhny osadki v vide frikadelek
Облачно, возможны осадки в виде фрикаделек | PSP | 1.00 | Original | | ULES-01361 | |
| Obratnyj otschet
Обратный отсчет | PC | v.1 1.06.10.22 | Original | | | |
| Obscure
ObsCure | PS2 | 1.01 | Original | | SLES-53322 | |
| Obscure II
ObsCure II | PC | 1.0.0.0 | Original | | | |
| Oficery: Special'noe izdanie
Офицеры: Специальное издание | PC | 1.18.2 | Original | | | |
| Onible'jd
Ониблэйд | PC | | Original | | | |
| Onimusha: Put' samuraja
Onimusha: Путь самурая | PC | | Original | | | |
| Operaciya Bagration
Операция Багратион | PC | | Original | | | |
| The Orange Box (Disc 1) | PC | | Rerelease | | | |
| The Orange Box (Disc 1) | PC | | Original |        | | |
| The Orange Box (Disc 1) | PC | 4295 / 4539 | Rerelease |    | | |
| The Orange Box (Disc 2) | PC | | Rerelease | | | |
| The Orange Box (Disc 2) | PC | | Original | | | |
| The Orange Box (Disc 2) | PC | 4295 / 4539 | Rerelease | | | |
| Order of War: Osvobozhdenie
Order of War: Освобождение | PC | | Igromaniya: Vybor redakcii | | | |
| Order of War: Stolknovenie
Order of War: Столкновение | PC | | Igromaniya: Vybor redakcii | | | |
| Osada Avalona (Disc 1)
Осада Авалона | PC | | | | | |
| Osada Avalona (Disc 2)
Осада Авалона | PC | | | | | |
| Ost-Indskaya kompaniya: Zolotoe izdanie
Ост-Индская компания: Золотое издание | PC | | Original | | | |
| Overlord | PC | 1.2 | Original | | | |
| Overlord II | PC | | Original | | | |
| Overlord: Raising Hell | PC | 1.3 | Original | | | |
 | Obscure | PC | | Back 2 Games | | 71902134 | |
| Oddworld: Abe's Exoddus (Disc 1) | PSX | | Original | | SLES-01505 | |
| Oddworld: Abe's Exoddus (Disc 2) | PSX | | Original | | SLES-11505 | |
| Oddworld: Abe's Oddysee | PSX | | Original | | SLES-00841 | |
| Oddworld: Munch's Oddysee | XBOX | | Original | | MS-001 | |
| Official PlayStation 2 Magazine Demo 10 | PS2 | 1.00 | | | SCED-50406 | |
| Official PlayStation 2 Magazine Demo 15 | PS2 | 1.00 | | | SCED-50708 | |
| Official PlayStation 2 Magazine Demo 23 | PS2 | 1.10 | | | SCED-51163 | |
| Official PlayStation 2 Magazine Demo 26 | PS2 | 1.00 | | | SCED-51321 | |
| Official PlayStation 2 Magazine Demo 30 | PS2 | 1.00 | | | SCED-51552 | |
| Official PlayStation 2 Magazine Demo 32 | PS2 | 1.00 | | | SCED-51656 | |
| Official PlayStation 2 Magazine Demo 34 | PS2 | 1.01 | | | SCED-51760 | |
| Official PlayStation 2 Magazine Demo 40 | PS2 | 1.01 | | | SCED-52054 | |
| Official PlayStation 2 Magazine Demo 41 | PS2 | 1.00 | | | SCED-52158 | |
| Official PlayStation 2 Magazine Demo 42 | PS2 | 1.02 | | | SCED-52270 | |
| Official PlayStation 2 Magazine Demo 54 | PS2 | 1.00 | | | SCED-53067 | |
 | Official PlayStation 2 Magazine Demo 45
ops2m demo 45 | PS2 | 1.02 | | | SCED-52452 | |
| Official PlayStation 2 Magazine Demo 58
ops2m demo 58: spa/por | PS2 | 1.00 | | | SCED-53348 | |
| Official PlayStation 2 Magazine Demo 67
ops2m demo 67 | PS2 | 1.00 | | | SCED-53932 | |
| Official PlayStation 2 Magazine Demo 69 & 70
ops2m demo 69 & 70 | PS2 | 1.01 | | | SCED-54036 | |
| Official PlayStation 2 Magazine Demo 71 | PS2 | 1.01 | | | SCED-54070 | |
| Official PlayStation 2 Magazine Demo 80
ops2m demo 80 spa/por | PS2 | 1.00 | | | SCED-54567 | |
| Official PlayStation 2 Magazine Demo 81
ops2m demo 81 spa/por | PS2 | 1.00 | | | SCED-54603 | |
