Region | Title | System | Version | Edition | Languages | Serial | Status |
| Ookami: Fude-hajime no Maki 大神 筆はじめノ巻 | PS2 | 1.01 | Taikenban | | SLPM 61124 | |
| 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 | |
| Oretachi Geesen Zoku: Akumajou Dracula オレたちゲーセン族 悪魔城ドラキュラ | PS2 | 1.01 | Original | | SLPM 62729 | |
| Oretachi Geesen Zoku: Crazy Climber オレたちゲーセン族 クレイジー・クライマー | PS2 | 1.01 | Original | | SLPM 62627 | |
| Oretachi Geesen Zoku: Karate-dou オレたちゲーセン族 空手道 | PS2 | 1.01 | Original | | SLPM 62628 | |
| 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: Nekketsu Kouha Kunio-kun オレたちゲーセン族 熱血硬派くにおくん | PS2 | 1.01 | Original | | SLPM 62706 | |
| Oretachi Geesen Zoku: Pooyan オレたちゲーセン族 プーヤン | PS2 | 1.01 | Original | | SLPM 62731 | |
| Oretachi Geesen Zoku: Scramble オレたちゲーセン族 スクランブル | PS2 | 1.01 | Original | | SLPM 62626 | |
| Oretachi Geesen Zoku: Sonic Wings オレたちゲーセン族 ~ソニックウィングス~ | PS2 | 1.01 | Original | | SLPM 62646 | |
| Oretachi Geesen Zoku: Time Pilot オレたちゲーセン族 タイムパイロット | PS2 | 1.01 | Original | | SLPM 62644 | |
| Oretachi Geesen Zoku: Yie Ar Kung Fu オレたちゲーセン族 イー・アル・カンフー | PS2 | 1.01 | Original | | SLPM 62696 | |
| 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 | |
| Otome no Jijou 乙女の事情 | PS2 | 1.01 | Original | | SLPM 66508 | |
| 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 | |
| Outlaw Volleyball Remixed | PS2 | 1.01 | Original | | SLES-53138 … | |
| Official Sega Dreamcast Magazine Vol. 3: January 2000 | DC | 1.010 | | | IGN2 | |
| Official Sega Dreamcast Magazine Vol. 5: May 2000 | DC | 1.010 | | | | |
| Odin Sphere オーディン・スフィア | PS2 | 1.02 | Original, PlayStation 2 the Best | | SLPM 66474 … | |
| Official Demo Disc Retail Edition February 02 official demo disc retail edition february 02 | PS2 | 1.02 | | | SCED-50732 | |
| Official PlayStation 2 Magazine Demo 26 | PS2 | 1.02 | | | SCED-50748 … | |
| Official PlayStation 2 Magazine Demo 27 | PS2 | 1.02 | | | SCED-50749 | |
| Official PlayStation 2 Magazine Demo 31 | PS2 | 1.02 | | | SCED-51556 | |
| Official PlayStation 2 Magazine Demo 31 | PS2 | 1.02 | | | SCED-51529 | |
| Official PlayStation 2 Magazine Demo 32 | PS2 | 1.02 | | | SCED-51567 | |
| Official PlayStation 2 Magazine Demo 35 | PS2 | 1.02 | | | SCED-51570 | |
| Official PlayStation 2 Magazine Demo 37 | PS2 | 1.02 | | | SCED-51572 | |
| Official PlayStation 2 Magazine Demo 39 | PS2 | 1.02 | | | SCED-51540 … | |
| Official PlayStation 2 Magazine Demo 40 | PS2 | 1.02 | | | SCED-51535 … | |
| Official PlayStation 2 Magazine Demo 42 | PS2 | 1.02 | | | SCED-52270 | |
| Official PlayStation 2 Magazine Demo 45 | PS2 | 1.02 | | | SCED-52160 | |
| Official PlayStation 2 Magazine Demo 45 | PS2 | 1.02 | | | SCED-52442 | |
| Official PlayStation 2 Magazine Demo 45 ops2m demo 45 | PS2 | 1.02 | | | SCED-52452 | |
| Official PlayStation 2 Magazine Demo 50 ops2m demo 50 | PS2 | 1.02 | | | SCED-52785 … | |
| Official PlayStation 2 Magazine Demo 50 | PS2 | 1.02 | | | SCED-52090 | |
| Official PlayStation 2 Magazine Demo 57 | PS2 | 1.02 | | | SCED-53159 | |
| Official PlayStation 2 Magazine Demo 57 | PS2 | 1.02 | | | SCED-53160 | |
| Official PlayStation 2 Magazine Demo 58 | PS2 | 1.02 | | | SCED-53206 | |
| Official PlayStation 2 Magazine Demo 71 | PS2 | 1.02 | | | SCED-54043 | |
| Official PlayStation 2 Magazine Demo 71 | PS2 | 1.02 | | | SCED-54079 | |
| Official PlayStation 2 Magazine Demo 86 | PS2 | 1.02 | | | SCED-54411 | |
| Official PlayStation 2 Magazine Demo 88 | PS2 | 1.02 | | | SCED-54413 … | |
| Official PlayStation 2 Magazine Germany Special Edition 2005/01 ops2m ger special 01/2005 | PS2 | 1.02 | | | SCED-53298 | |
| Official PlayStation 2 Magazine Germany Special Edition 2007-1 | PS2 | 1.02 | | | SCED-54693 | |
| Official PlayStation 2 Magazine-UK Special Edition 11: The World's Best PS2 Games Ever ops2m special edition 11 | PS2 | 1.02 | | | SCED-51505 | |
| Official U.S. PlayStation Magazine Demo Disc 107 | PS2 | 1.02 | | | SCUS 97535 | |
| Das Offizielle PlayStation 2 Magazin 09/2004 OPS2M Uncut Edition 09/04 | PS2 | 1.02 | | | SCED-52089 … | |
| Omoi no Kakera: Close to 想いのかけら ‐Close to‐ | PS2 | 1.02 | 2800 Collection | | SLPM 66385 | |
| Onimusha Buraiden 鬼武者 無頼伝 | PS2 | 1.02 | Original | | SLPM 65411 | |
| Onimusha: Dawn of Dreams (Disc 1) | PS2 | 1.02 | Original | | SLUS-21180 | |
| Onimusha: Dawn of Dreams (Disc 2) | PS2 | 1.02 | Original | | SLUS-21362 | |
| Onimusha: Warlords | PS2 | 1.02 | Original, Platinum | | SLES-50247 … | |
| Online Chess Kingdoms | PSP | 1.02 | Original | | ULES-00570 | |
| Online Chess Kingdoms | PSP | 1.02 | Original | | ULUS 10179 | |
| Oookuki 大奥記 | PS2 | 1.02 | Original | | SLPM 66441 | |
| 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 … | |
| 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 | |
| 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: Thunder Cross オレたちゲーセン族 サンダークロス | PS2 | 1.02 | Original | | SLPM 62744 | |
| 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 | |
| Oshiete! Popotan おしえて! ぽぽたん | PS2 | 1.02 | Original | | SLPM 65535 | |
| 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 | |
| Outlaw Volleyball Remixed | PS2 | 1.02 | Original | | SLUS 21049 | |
| Official Sega Dreamcast Magazine Vol. 2: November 1999 | DC | 1.020 | | | IGN1 | |
| Official Sega Dreamcast Magazine Vol. 4: March 2000 | DC | 1.020 | | | IGN3 | |
| Official Sega Dreamcast Magazine Vol. 7: September 2000 | DC | 1.020 | | | IGN7 | |
| Official Sega Dreamcast Magazine Vol. 8: November 2000 | DC | 1.020 | | | IGN8 | |
| Official PlayStation 2 Magazine Demo 31 | PS2 | 1.03 | | | SCED-51566 | |
| Official PlayStation 2 Magazine Demo 33 ops2m demo 33 | PS2 | 1.03 | | | SCED-51559 | |
| Official PlayStation 2 Magazine Demo 34 | PS2 | 1.03 | | | SCED-51560 | |
| Official PlayStation 2 Magazine Demo 49 | PS2 | 1.03 | | | SCED-52164 | |
| Official PlayStation 2 Magazine Demo 50 | PS2 | 1.03 | | | SCED-52165 | |
| Official PlayStation 2 Magazine Demo 56 ops2m demo 56 | PS2 | 1.03 | | | SCED-53176 | |
| Onimusha 鬼武者 | PS2 | 1.03 | Original, Mega Hits! | | SLPM 65010 … | |
| Onimusha 2: Samurai's Destiny | PS2 | 1.03 | Original | | SLUS-20393 | |
| Online Pro Wrestling オンラインプロレスリング | PS2 | 1.03 | Original | | SLPM 65586 | |
| Onmyou Taisenki: Hasha no In 陰陽大戦記 ~覇者の印~ | PS2 | 1.03 | Original | | SLPS 25501 | |
| Ookami 大神 | PS2 | 1.03 | Original, PlayStation 2 the Best | | SLPM 66375 … | |
| Ore ga Kantoku da! Gekitou Pennant Race オレが監督だ! ~激闘ペナントレース~ | PS2 | 1.03 | Original | | SLPM 65005 | |
| 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 … | |
| Otome-teki Koi Kakumei: Love Revo!! 乙女的恋革命★ラブレボ!! | PS2 | 1.03 | Love Revo Box | | SLPM 66237 | |
| 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 | |
| Official Demo Disc 1: Retail Edition November 01 | PS2 | 1.04 | Kiosk Demo | | SCED-50615 | |
| Official PlayStation 2 Magazine Demo 42 | PS2 | 1.04 | | | SCED-51539 … | |
| OMSI: Der Omnibussimulator | PC | 1.04 | OMSI Bundle | | | |
| Onimusha 2 鬼武者2 | PS2 | 1.04 | Shokai Press-ban | | SLPM 65100 | |
| Onimusha 2 鬼武者2 | PS2 | 1.04 | Original, Mega Hits! | | SLPM 65101 … | |
| Ookami Kakushi おおかみかくし | PSP | 1.04 | Original | | ULJM 05413 | |
| Ore ga Kantoku da! Volume 2: Gekitou Pennant Race オレが監督だ!Volume.2 ~激闘ペナントレース~ | PS2 | 1.04 | Original | | SLPM 65056 | |
| Oretachi Geesen Zoku: Super Volleyball オレたちゲーセン族 スーパーバレーボール | PS2 | 1.04 | Original | | SLPM 62660 | |
| Oretachi Geesen Zoku: Terra Cresta オレたちゲーセン族 テラクレスタ | PS2 | 1.04 | Original | | SLPM 62661 | |
| Otome wa Boku ni Koishiteru 乙女はお姉さまに恋してる | PS2 | 1.05 | Original | | SLPM 66165 | |
| Les Ours Berenstain: Comme des Grands | CDI | 1.05 | | | 812 0063 | |
| Official Sega Dreamcast Magazine Vol. 6: July 2000 | DC | 1.050 | | | IGN6 | |
| Obitel' t'my: Sumerki Обитель тьмы: Сумерки | PC | 1.1 | Original | | | |
| Official PlayStation 2 Magazine Demo 10 | PS2 | 1.10 | | | SCED-50145 | |
| Official PlayStation 2 Magazine Demo 11 | PS2 | 1.10 | | | SCED-50146 | |
| Official PlayStation 2 Magazine Demo 20 | PS2 | 1.10 | | | SCED-50743 | |
| Official PlayStation 2 Magazine Demo 20 | PS2 | 1.10 | | | SCED-50945 | |
| Official PlayStation 2 Magazine Demo 22 | PS2 | 1.10 | | | SCED-50701 | |
| Official PlayStation 2 Magazine Demo 23 | PS2 | 1.10 | | | SCED-51163 | |
| Official PlayStation 2 Magazine Demo 24 | PS2 | 1.10 | | | SCED-50746 | |
| Official PlayStation 2 Magazine Demo 24 | PS2 | 1.10 | | | SCED-51185 | |
| Official PlayStation 2 Magazine Demo 9 | PS2 | 1.10 | | | SCED-50144 | |
| Official PlayStation 2 Magazine Germany Special Edition 1 ops2m germany special edition 1 | PS2 | 1.10 | | | SCED-50780 | |
| Official PlayStation 2 Magazine-UK Greatest Hits Volume 8: Special Edition: Racing Games playstation 2 greatest hits volume 8 | PS2 | 1.10 | | | SCED-50786 | |
| The Omega Stone: Riddle of the Sphinx II (Disc 1) | PC | 1.2.3.2 | Original | | | |
| The Omega Stone: Riddle of the Sphinx II (Disc 2) | PC | 1.2.3.2 | Original | | | |
| The Omega Stone: Riddle of the Sphinx II (Disc 3) | PC | 1.2.3.2 | Original | | | |
| The Omega Stone: Riddle of the Sphinx II (Disc 4) | PC | 1.2.3.2 | Original | | | |
| Official PlayStation 2 Magazine Demo 8 | PS2 | 1.20 | | | SCED-50381 | |
| Official Sega Dreamcast Magazine Vol. 10: January 2001 | DC | 1.200 | | | IGN10 | |
| Oregon Trail II: 25th Anniversary Limited Edition | PC | 1.3 | Original, SoftKey | | #OTR744AE-CD | |
| Overlord: Raising Hell | PC | 1.3 | Original | | MOVLRCDEU00 | |
| Operation Flashpoint: Gold Upgrade | PC | 1.30 | Original | | MOFUCDUS00 | |
| Operation Flashpoint: Gold Upgrade | PC | 1.30 | Original, Gold Edition | | MOFUCDEU00, MOFUCDUS00 | |
| Okudera Yasuhiko no Sekai o Mezase! Soccer Kids: Nyuumon-hen 奥寺康彦の世界をめざせ! サッカー・キッズ 入門編 | SS | 1.310 | Original | | T-26001G | |
| Over the Monochrome Rainbow featuring Shogo Hamada | PS2 | 1.40 | Original | | SLPM 65271 | |
| Operation Flashpoint: Resistance | PC | 1.75 | Original | | MOFRCDEU00 | |
| Operation Flashpoint: Resistance | PC | 1.75 | Original | | MOFRCDUS00 | |
| Oxford Handbook of Clinical Medicine for PDAs: Seventh Edition | PALM | 10.0.05/2007.9.7 | | | | |
| Oddworld: Abe's Exoddus (Play Disc) | PC | 2.0 | Budget, Covermount | | MMICDR 5280 | |
| Oddworld: Abe's Exoddus (Installatie Disk) | PC | 2.0 | Budget | | MMICDR 5280 | |
| Outlaws: Cidade Sem Lei (Disc 1) | PC | 2.0 | Original | | 0806.05.0 | |
| Outlaws: Cidade Sem Lei (Disc 2) | PC | 2.0 | Original | | 0806.06.0 | |
| Official PlayStation 2 Magazine Demo 70 | PS2 | 2.00 | | | SCED-54024 | |
| Olympic Soccer | SS | 2.000 | Original | | T-7904H-09, T-7904H-50 | |
| Olympic Soccer | SS | 2.000 | Original | | T-07904H-18 | |
| Olympic Soccer | SS | 2.000 | Original | | T-7904H | |
| Official PlayStation 2 Magazine Demo 98 | PS2 | 2.01 | | | SCED-55117 … | |
| Official U.S. PlayStation Magazine Demo Disc 76 | PS2 | 2.01 | | | SCUS 97251 | |
| Oscar Wilde's The Selfish Giant | PC | 2.10 | Original | | MQ 13-004-144 | |
| 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 | | | |
| Operaciya Silent Storm (Disc 1) Операция Silent Storm | PC | Aug 11 2003 | 1C: Igroteka | | | |
| Operaciya Silent Storm (Disc 2) Операция Silent Storm | PC | Aug 11 2003 | 1C: Igroteka | | | |
| Official U.S. PlayStation Magazine Demo Disc 43 | PSX | EDC | | | SCUS-94634 | |
| Otomedius (System Disc) オトメディウス | KEA | JAA | Original | | GGGJAA01 | |
| Otomedius (Application Disc 1) オトメディウス | KEA | JAA | Original | | GGGJAA02 | |
| Otomedius (Application Disc 2) オトメディウス | KEA | JAA | Original | | GGGJAA03 | |
| OnHand Sports Games / Sega Swirl Lite | PALM | PDA105-01 | OnHand Double Pack (Sports Games/Astrologer) | | PDA105-01 | |
| Once Upon a Time | WII | Rev 1 | Original | | RVL-SUTE-USA-B0 | |
| One Piece: Unlimited Cruise: Episode 1: Nami ni Yureru Hihou ワンピース アンリミテッドクルーズ エピソード1 波に揺れる秘宝 | WII | Rev 1 | Minna no Osusume Selection | | RVL-ROUJ-JPN-B0 | |
| One Piece: Unlimited Cruise: Episode 2: Mezameru Yuusha ワンピース アンリミテッドクルーズ エピソード2 目覚める勇者 | WII | Rev 1 | Original | | RVL-RIUJ-JPN-B0 | |
| Onechanbara: Bikini Zombie Slayers | WII | Rev 1 | Original | | RVL-RONP-EUR | |
| Onside Complete Soccer | PSX | Rev 1 | Original | | SLES-00079 | |
| Oshare Cooking おしゃれクッキング | FMT | Rev A | Original | | HMA-267A | |
| Oshare Cooking II おしゃれクッキングⅡ | FMT | Rev B | Original | | HMA-267B | |