Region | Title | System | Version | Edition | Languages | Serial | Status |
 | Oz OZ -オズ- | PS2 | 1.02 | Original, Konami the Best | | SLPM 66033 … | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | OverBlood 2 オーバーブラッド2 | PSX | | Special Movie-ban | | PAPX 90046 … | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | Over Drivin' DX: Rally Edition オーバードライビンDX ラリーエディション | PSX | | Hibaihin | | SLPM 80032 | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | Otostaz オトスタツ | PS2 | 1.00 | Taikenban | | SCPS 11020 | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | Otostaz オトスタツ | PS2 | 1.00 | Taikenban | | PAPX 90228 | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | Otostaz オトスタツ | PS2 | 1.00 | Original | | SCPS 11024 | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | Otostaz 蓋蓋樂 | PS2 | 1.00 | Original | | SCPS 55023 | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | Otome-teki Koi Kakumei: Love Revo!! 乙女的恋革命★ラブレボ!! | PS2 | 1.03 | Original, Love Revo Box | | SLPM 66238 … | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | Ore! Tomba オレっ!トンバ | PSX | | Taikenban | | SLPM 80165 | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | Operation Flashpoint: Elite | XBOX | | Original | | CM-090 | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | Operation Flashpoint: Dragon Rising | PS3 | 01.01 | Original | | BLJM 60152 | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | Ookami: Fude-hajime no Maki 大神 筆はじめノ巻 | PS2 | 1.01 | Taikenban | | SLPM 61124 | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | Ookami 大神 | PS2 | 1.03 | Original, PlayStation 2 the Best | | SLPM 66375 … | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | Online Pro Wrestling オンラインプロレスリング | PS2 | 1.03 | Original | | SLPM 65586 | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | Onimusha 3 鬼武者3 | PS2 | 1.01 | Original | | SLPM 65413 | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | Onimusha 2 鬼武者2 | PS2 | 1.04 | Shokai Press-ban | | SLPM 65100 | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | Onimusha 鬼武者 | PS2 | 1.03 | Original, Mega Hits! | | SLPM 65010 … | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | Onimusha 鬼武者 | PS2 | 1.01 | Taikenban | | SLPM 61001 | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | One Piece: Kaizoku Musou ワンピース 海賊無双 | PS3 | 01.02 | Original, Treasure Box | | BLAS 50450 … | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | One Piece Mansion ワンピースマンション | PSX | | Taikenban | | SLPM 80617 | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | Omega Boost オメガ・ブースト | PSX | | Taikenban | | PAPX 90080 | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | Ōkami | PS2 | 1.00 | Original | | SLES-54439 … | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | Official Xbox Magazine Game Disc 64 | XBOX | | | | IM-223 | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | Official Xbox Magazine Game Disc 63 | XBOX | | | | IM-222 | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | Official Xbox Magazine Game Disc 55 | XBOX | | | | IM-209 | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | Official Xbox Magazine Game Disc 23 | XBOX | | | | IM-022 | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | Official Xbox Magazine Game Disc 15 | XBOX | | | | IM-014 | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | Official Xbox Magazine Game Disc 07 | XBOX | | | | IM-006 | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | Official U.S. PlayStation Magazine Demo Disc 75 | PS2 | 1.00 | | | SCUS 97250 | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | Official U.S. PlayStation Magazine Demo Disc 65 | PS2 | 1.00 | | | SCUS 97191 | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | Official U.S. PlayStation Magazine Demo Disc 61 | PS2 | 1.00 | | | SCUS 97187 | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | Official U.S. PlayStation Magazine Demo Disc 54 | PSX | | | | SCUS-94664 | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | Official U.S. PlayStation Magazine Demo Disc 20 | PSX | | | | SCUS-94282 | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | Official U.S. PlayStation Magazine Demo Disc 108 | PS2 | 1.00 | | | SCUS 97536 | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | Official Disc 2003 | PS2 | 1.01 | Taikenban | | PAPX 90507 | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | Off Road | PSP | 1.01 | Original | | ULES-00963 | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | Odin Sphere | PS2 | 1.00 | Original, Greatest Hits | | SLUS 21577 … | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | Odin Sphere オーディン・スフィア | PS2 | 1.02 | Original, PlayStation 2 the Best | | SLPM 66474 … | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | Oddworld: Abe's Oddysee | PC | 2.0 | Original | | 04-12608CD | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | Odama 大玉 | GC | Rev 1 | Bundled with Microphone | | DL-DOL-GOOJ-JPN | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | Obscure ObsCure | PS2 | 1.00 | Original | | SLUS 20777 | ![2 and more dumps from original media [!] 2 and more dumps from original media [!]](/images/status/green.png) |
 | OverBlood 2: The "East Edge" File オーバーブラッド2 -The "East Edge" File- | PSX | | Premium Disc | | SLPM 80270 |  |
 | Over Drivin' IV オーバードライビンⅣ | PSX | | Taikenban Disc | | SLPM 80437 |  |
 | Over Drivin' III: Hot Pursuit オーバードライビンⅢ | PSX | | Taikenban Disc | | SLPM 80298 |  |
 | Otostaz オトスタツ | PS2 | 1.00 | Taikenban | | PAPX 90226 |  |
 | Otona no Gal-jong: Kimi ni Haneman! おとなのギャル雀 ~きみにハネ満!~ | PS2 | 1.03 | Jaleco the Best | | SLPM 62549 |  |
 | Otona no Gal-jong 2: Koishite Bai Man! おとなのギャル雀2 恋して倍満! | PS2 | 1.01 | Original | | SLPM 66194 |  |
 | Otome-teki Koi Kakumei: Love Revo!! 乙女的恋革命★ラブレボ!! | PS2 | 1.03 | Love Revo Box | | SLPM 66237 |  |
 | Otome wa Boku ni Koishiteru 乙女はお姉さまに恋してる | PS2 | 1.05 | Original | | SLPM 66165 |  |
 | Osouji Sentai Clean Keeper H お掃除戦隊 くりーんきーぱーはいぱーH | PS2 | 1.01 | Original | | SLPM 55220 |  |
 | Oshiete! Popotan おしえて! ぽぽたん | PS2 | 1.02 | Original | | SLPM 65535 |  |
 | Oscar Wilde's The Selfish Giant | PC | 2.10 | Original | | MQ 13-004-144 |  |
 | Oretachi Geesen Zoku: Trio the Punch オレたちゲーセン族 トリオ・ザ・パンチ | PS2 | 1.02 | Original | | SLPM 62745 |  |
 | Oretachi Geesen Zoku: Rabio Lepus オレたちゲーセン族 ラビオ レプス | PS2 | 1.00 | Original | | SLPM 62707 |  |
 | Oretachi Geesen Zoku: Quarth オレたちゲーセン族 クォース | PS2 | 1.02 | Original | | SLPM 62704 |  |
 | Oretachi Geesen Zoku: Moon Cresta オレたちゲーセン族 ムーンクレスタ | PS2 | 1.01 | Original | | SLPM 62645 |  |
 | Oretachi Geesen Zoku: Contra オレたちゲーセン族 魂斗羅 | PS2 | 1.00 | Original | | SLPM 62730 |  |
 | Ore no Shita de Agake 俺の下で AGAKE | PS2 | 1.01 | Original | | SLPS 25796 |  |
 | Ore no Ryouri 俺の料理 | PSX | | Taikenban | | PAPX 90084 |  |
 | Ore no Ryouri 俺の料理 | PSX | | Taikenban | | PAPX 90089 |  |
 | Option: Tuning Car Battle Option チューニングカーバトル | PSX | | Taikenban | | SLPM 80206 |  |
 | Option: Tuning Car Battle Option チューニングカーバトル | PSX | | Highlight-ban | | SLPM 80203 |  |
 | Operator's Side オペレーターズサイド | PS2 | 1.02 | Original | | SCPS 15039 |  |
 | Oookuki 大奥記 | PS2 | 1.02 | Original | | SLPM 66441 |  |
 | Onmyou Taisenki: Hasha no In 陰陽大戦記 ~覇者の印~ | PS2 | 1.03 | Original | | SLPS 25501 |  |
 | Online Start-Up Disc v3.5: Broadband Only | PS2 | 1.00 | Original | | PBPX-95246 |  |
 | Oni / 4x4 Evo Oni / 4x4 Evolution | PC | | Demo | | 12DC1-09GM03-11 |  |
 | One Piece: Grand Adventure 원피스: 그랜드 배틀 어드벤처 | PS2 | 1.00 | Original | | SLKA 25388 |  |
 | Okigaru Igo Taikyoku お気軽囲碁対局 | PPC | | Original | | |  |
 | Okigaru Igo Taikyoku お気軽囲碁対局 | PALM | | Original | | |  |
 | Ōkami 오오카미 | PS2 | 1.00 | Original | | SCKA 20095 |  |
 | Ojousama Express お嬢様特急 | PSX | | Taikenban | | SLPM 80255 |  |
 | Oh-chan no Oekaki Logic for Palm おーちゃんのお絵かきロジック for Palm | PALM | 1.04 | Original | | |  |
 | Odo Odo Oddity おどおど おっでぃ | PSX | | Hibaihin | | SLPM 80075 |  |
 | ODN Palm Power Pack | PALM | | Original | | |  |
 | Odin Sphere | PS2 | 1.00 | Trade Demo | | SLUS-28065 |  |
 | Odin Sphere 오딘 스피어 | PS2 | 1.00 | Sample | | SCKA 20107 |  |
 | Obsidian | PC | 1.0 | Demo | | |  |
 | Obsidian (Disc 5) オブシディアン | PC | 1.0 | Original | | INR-1003 |  |
 | Obsidian (Disc 4) オブシディアン | PC | 1.0 | Original | | INR-1003 |  |
 | Obsidian (Disc 3) オブシディアン | PC | 1.0 | Original | | INR-1003 |  |
 | Obsidian (Disc 2) オブシディアン | PC | 1.0 | Original | | INR-1003 |  |
 | Obsidian (Disc 1) オブシディアン | PC | 1.0 | Original | | INR-1003 |  |