| Region | Title | System | Version | Edition | Languages | Serial | Status |
|---|
 | Oto to E no Deru Eigo Jisho No. 1: Start with Words
音と絵の出る英語辞書 Ｎｏ．１ 「Ｓｔａｒｔ ｗｉｔｈ Ｗｏｒｄｓ」 | FMT | | Original, Rerelease |  | HMA-217 |  |
| Oogami Ichirou Funtouki: Sakura Taisen Kayou Show "Beni Tokage" yori (Disc 1)
大神一郎奮闘記 ～サクラ大戦歌謡ショウ「紅蜥蜴」より～ | DC | 1.000 | Original, Sample | | HDR-0057 | ![2 and more dumps from original media [!]](/images/status/green.png "2 and more dumps from original media [!]") |
| Oogami Ichirou Funtouki: Sakura Taisen Kayou Show "Beni Tokage" yori (Disc 2)
大神一郎奮闘記 ～サクラ大戦歌謡ショウ「紅蜥蜴」より～ | DC | 1.000 | Original, Sample | | HDR-0057 | |
| Oyaji Hunter Mahjong
おやじハンター・マージャン | 3DO | | Original, Sample | | IMP-SF0703 | |
| Orange Pocket: Cornet
オレンジポケット －コルネット－ | DC | 1.004 | Original, Shokai Genteiban | | T-18707M, T-18708M | |
 | Odell Down Under | PC | | Original, SoftKey |  | POD544AE-CD | |
| Oregon Trail II: 25th Anniversary Limited Edition | PC | 1.3 | Original, SoftKey | | #OTR744AE-CD | |
| Obscure: The Aftermath
ObsCure: The Aftermath | PSP | 1.00 | Original, Test Sample |   | ULUS-10484 | |
 | Overwatch | PC | | Origins Edition | | 052429 | |
 | Overwatch | PC | | Origins Edition |        | | |
| Oddworld: Abe's Oddysee | PSX | | Platinum | | SLES-00839 | |
| Oddworld: Munch's Oddysee | XBOX | | Platinum Hits | | MS-001 | |
| Operation Flashpoint: Cold War Crisis | PC | | Playable Demo | | POPFCDUS40 | |
 | O! Rety! Psoty Dudusia Wesołka | PC | | Playada Gier | | P_20265_03A_PL | |
| Option: Tuning Car Battle
オプション チューニングカーバトル | PSX | Rev 1 | PlayStation the Best | | SLPS 91037 | |
| OverBlood 2: The "East Edge" File
オーバーブラッド２ －Ｔｈｅ ＂Ｅａｓｔ Ｅｄｇｅ＂ Ｆｉｌｅ－ | PSX | | Premium Disc | | SLPM 80270 | |
| Official Lara Croft: Real Life '99 Lara: Character Images | PC | | Press Kit | | | |
| Overlord II | PC | | Preview Code |   | | |
 | Omikron: The Nomad Soul | PC | | Promo | | | |
 | Oddworld: Abe's Exoddus (Installazione) | PC | 1.0 | Replay | | ABEXPCREI/A1 | |
| Oddworld: Abe's Exoddus (Gioco) | PC | 1.0 | Replay | | ABEXPCREI/A2 | |
| Operation: Surgery Has Never Been so Silly! | PC | | Replay Kids | | OPERPCREGB/A | |
| Optimum Resource Sampler | PC | | Rerelease | | | |
 | The Orange Box (Disc 1) | PC | | Rerelease | | | |
| The Orange Box (Disc 1) | PC | 4295 / 4539 | Rerelease |         | | |
| The Orange Box (Disc 2) | PC | | Rerelease | | | |
| The Orange Box (Disc 2) | PC | 4295 / 4539 | Rerelease | | | |
| The Oregon Trail 3rd Edition: Pioneer Adventures (Disc 1) | PC | 1.2 | Rerelease | | OTA744BE-CD1 | |
| The Oregon Trail 4th Edition (Disc 1) | PC | 1.1 | Rerelease | | OTF744BE-CD1 | |
| The Oregon Trail 4th Edition (Disc 2) | PC | 1 | Rerelease | | OTF744CE-CD2 | |
| The Oregon Trail 4th Edition (Disc 2) | PC | 1.1 | Rerelease | | OTF744BE-CD2 | |
| The Oregon Trail 4th Edition (Disc 3) | PC | 1.1 | Rerelease | | OTF744BE-CD3 | |
| Oregon Trail II | PC | 1.31 | Rerelease | | HCD744BE-CD | |
| Oregon Trail II | PC | 1.31 | Rerelease | | #HCD744AE-CD | |
| Oregon Trail II | PC | 1.32 | Rerelease | | #HCD744CE-CD | |
| Out of This World | PC | | Rerelease | | CD-MMC-023-0 | |
| Oz: The Magical Adventure | PC | 7.0.0.198 | Rerelease | | 92785 | |
| The Oregon Trail 5th Edition: Adventures Along the Oregon Trail | PC | 1.1 | Rerelease, Southwestern School Set | | 380859B-CD | |
| OutRun 2006: Coast 2 Coast | PS2 | 1.01 | Review | | SLES-53998 | |
| Off Limits: Cassiopeia | PC | | ROMWARE | | ROM 10100 | |
| Off Limits: Mizar | PC | | ROMWARE | | ROM 10120 | |
| One Must Fall 2097
One Must Fall 2097 CD-ROM | PC | 1.1 | ROMWARE | | ROM 10017 | |
| OverKill | PC | | ROMWARE | | ROM 10 007 | |
 | Odin Sphere
오딘 스피어 | PS2 | 1.00 | Sample | | SCKA 20107 | |
| The Oregon Trail 5th Edition: Adventures Along the Oregon Trail | PC | 1.0 | Scholastic | | 380859-CD WP2 | |
| OutRun 2006: Coast 2 Coast | PC | 1.00.0000 | Serie Maxima II | | SEGA-PC029 | |
| Omatase! Janbaraya
おまたせ！ 雀バラや♪ | PC | | Shokai Genteiban | | | |
| 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 Pocket: Root
オレンジポケット ～リュート～ | PS2 | 1.02 | Shokai Genteiban | | SLPM 65524 | |
| 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 | |
| Omerta: Chinmoku no Okite: The Legacy
オメルタ ～沈黙の掟～ ＴＨＥ ＬＥＧＡＣＹ | PSP | 1.01 | Shokai Goukaban | | ULJM 06393 | |
| The Oregon Trail | PC | 3.0.1 | Slash | | CDRM1239790 | |
| Oregon Trail II | PC | 1.3 | Smart Saver | | 0TT744AE-CD | |
| Oregon Trail II | PC | 1.3 | Smart Saver | | 381032-CD/i401ha | |
| The Oregon Trail | PC | 1.22 | Smart Saver | | ORT844AE-CD | |
| The Oregon Trail: Classic Edition | PC | | SoftKey | | POT144EE-CD | |
| The Oregon Trail: Classic Edition | PC | | SoftKey | | POT144BE-CD | |
| The Oregon Trail: Classic Edition | PC | 3.0.1 | SoftKey | | POT144CE-CD | |
| Obscure
ObsCure | PC | | Software Pyramide | | | |
| Operation Flashpoint: Cold War Crisis | PC | 1.46 | Sold Out Software | | | |
| Operation Flashpoint: Cold War Crisis | PC | 1.46 | Sold Out Software | | | |
| Operation: Surgery Has Never Been so Silly! | PC | | Sold Out Software | | | |
| Outlaw Racers | PC | | Sold Out Software | | | |
| The Original Links | PC | | Solid Gold Edition | | | |
| OverBlood 2
オーバーブラッド２ | PSX | | Special Movie-ban | | PAPX 90046 … | |
| Ojousama Kumikyoku: Sweet Concert
お嬢様組曲 －Ｓｗｅｅｔ Ｃｏｎｃｅｒｔ－ | PS2 | 1.01 | Special Pack-ban | | SLPM 66726 | |
 | Oblivious Garden: Carmina Burana (Disc 1) (Game Disk) | PC | 1.0 | Standard Edition | | | |
| Oblivious Garden: Carmina Burana (Disc 2) (Music Disc) | PC | | Standard Edition | | | |
| Ojousama Express
お嬢様特急 | PSX | | Taikenban | | SLPM 80255 | |
| Option: Tuning Car Battle
Ｏｐｔｉｏｎ チューニングカーバトル | PSX | | Taikenban | | SLPM 80206 | |
| Ore no Ryouri
俺の料理 | PSX | | Taikenban | | PAPX 90084 | |
| Ore no Ryouri
俺の料理 | PSX | | Taikenban | | PAPX 90089 | |
| Ore! Tomba
オレっ！トンバ | PSX | | Taikenban | | SLPM 80165 | |
| Otome Koigokoro Prister
乙女恋心プリスター体験版 | PC | | Taikenban | | | |
| Over Drivin' III: Hot Pursuit
オーバードライビンⅢ | PSX | | Taikenban Disc | | SLPM 80298 | |
| Over Drivin' IV
オーバードライビンⅣ | PSX | | Taikenban Disc | | SLPM 80437 | |
| Opera Fatal | PC | | Tandem | | 1444 | |
| ODS Air Explorer | PC | 5.0r134 | Teacher's Edition | | | |
| ODS Air Explorer | PC | 5.0r134 | Teacher's Edition | | | |
| ODS Amazing Art Corner | PC | 5.0r134 | Teacher's Edition | | | |
| ODS Carnival Math | PC | 5.0r134 | Teacher's Edition | | | |
| ODS Carnival Math | PC | 5.0r134 | Teacher's Edition | | | |
| ODS Robot Challenge | PC | 5.0.1r26 | Teacher's Edition | | | |
| Ore no Shikabane o Koete Yuke
俺の屍を越えてゆけ | PSX | | Tentou-you Movie Disc | | PCPX 96160 | |
| Operation Neptune | PC | 1.23 | The ClueFinders: Math Ages 9-12 | | ONT744EE-CD | |
 | Operation Flashpoint: Cold War Crisis | PC | | The Games Collection | | | |
| The Oregon Trail 3rd Edition: Pioneer Adventures (Disc 1) | PC | 1.3 | The Learning Company | | OAE744BE-CD1 | |
| The Oregon Trail 3rd Edition: Pioneer Adventures (Disc 2) | PC | 1.3 | The Learning Company | | OAE744BE-CD2 | |
| The Oregon Trail 3rd Edition: Pioneer Adventures (Disc 3) | PC | 1.3 | The Learning Company | | OAE744BE-CD3 | |
| One Must Fall 2097 | PC | 2.1 | The Smile Edition | | CDR3016 | |
 | OutRun 2006: Coast 2 Coast | PC | | Top Games | | SEGA-PC029 | |
| Oddworld: Abe's Oddysee | PSX | | Trade Demo | | | |
| Odin Sphere | PS2 | 1.00 | Trade Demo | | SLUS-28065 | |
| Only You: Sekai no Namida to Shoujo no Hanashi: Prelude
Ｏｎｌｙ Ｙｏｕ －世界の涙と少女のハナシ－ Ｐｒｅｌｕｄｅ | PC | 1.00 | Trial Edition version:share II | | | |
| Orion's Puzzle Collection | DC | 1.000 | Unlicensed | | | |
| OnSide Soccer | 3DO | | Unlicensed (oldergames, Good Deal Games Double Header! Two Game Set) | | | |
| Omar Sharif on Bridge | PC | | Valueware | | CD-ICD-148-0 | |
| Out of This World | PC | | Valueware | | CD-ICD-142-0 | |
| Operation Wolf
オペレーション・ウルフ | FMT | 1.00 | Ving Vol. 3 | | HMB-126 | |
| OutRun 2006: Coast 2 Coast | PC | | White Label | | 1673A | |
 | The Operational Art of War II | PC | 1.01.02 | Xplosiv | | EI-1259-3 | |
