Region | Title | System | Version | Edition | Languages | Serial | Status |
| Open Season (Disc 3) | PC | | Original | | 5004905-CD 3 | |
| Open Season (Disc 2) | PC | | Original | | 5004905-CD 2 | |
| Open Season (Disc 1) | PC | | Original | | 5004905-CD 1 | |
| Open Season (Disc 3) | PC | 1.00 | Original | | 5004904-CD 3 | |
| Open Season (Disc 2) | PC | 1.00 | Original | | 5004904-CD 2 | |
| Open Season (Disc 1) | PC | 1.00 | Original | | 5004904-CD 1 | |
| The Open Golf: History of Turnberry ジ・オープンゴルフ History of Turnberry | PSX | | Original | | SLPS 00418 | |
| Opel Vectra '99 | PHOTO-CD | | Original | | | |
| Opel IAA '99 (Disc 2) (Opel Highlights) | PHOTO-CD | | Original | | | |
| Opel IAA '99 (Disc 1) (Model Range) | PHOTO-CD | | Original | | | |
| Opel IAA '97 | PHOTO-CD | | Original | | | |
| Opel Corsa '97 | PHOTO-CD | | Original | | | |
| Ooumi Nobunaga Den: Geten II 大海信長伝・下天II | PSX | | Original | | SLPS 00874 | |
| Ookami-teki Monshou: Crest of Wolf 狼的紋章 クレスト・オブ・ウルフ | PCE | | Original | | HCD3044 | |
| Oogst van de Zon | CDI | | Original | | 814 0004 | |
| Oogami Ichirou Funtou-ki: 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 | | HDR-0057 | |
| Oogami Ichirou Funtou-ki: 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 | | HDR-0057 | |
| Ooga Booga | DC | 1.001 | Original | | 51140 | |
| Ooedo Renaissance 大江戸ルネッサンス | SS | 1.001 | Original | | T-9104G | |
| Ooedo Fuusui Ingaritsu: Hanabi 2 大江戸風水因果律 花火2 | PSX | | Original | | SLPS 02814 | |
| Ontdek het Onbekende Nederland | CDI | 1.06 | Original | | 814 0104 | |
| Ontdek de Interactieve Wereld van Neckermann | CDI | | Original | | | |
| Onside Complete Soccer | PSX | Rev 1 | Original | | SLES-00079 | |
| Onside Complete Soccer | PSX | | Original | | SLES-00079 | |
| Onsen Ryokou Kakumei: Ich liebe dich.! 温泉旅行革命 ~Ich liebe dich.!~ | PC | 1.00 | Original | | RUCCA-003 | |
| Onsen de Takkyuu 温泉de卓球 | PC | | Original | | | |
| Onsalakorv | PC | | Original | | | |
| Onmyou Taisenki: Byakko Enbu 陰陽大戦記 白虎演舞 | PS2 | 1.01 | Original | | SLPS 20417 | |
| Only One 2: Naomi: Ai no Inori ga Todoku Toki オンリーワン2 なおみ 愛の祈りが届く時 | PC | 1.0.0.1 | Original | | ON2-NAO | |
| Only One 2: Bijin Casino Dealer Hitomi: Sei no Roulette オンリーワン2 美人カジノディーラー瞳 性のルーレット | PC | | Original | | ON2-HITO | |
| Online Start-Up Disc v3.5: Broadband Only | PS2 | 1.00 | Original | | PBPX 95247 | |
| Online Start-Up Disc v3.5: Broadband Only | PS2 | 1.00 | Original | | PBPX-95246 | |
| Online Start-Up Disc v3.0 | PS2 | 1.02 | Original | | PBPX-95239 | |
| Online Start-Up Disc v1.0 Disco de Inicio en Línea v1.0 | PS2 | 1.00 | Original | | PBPX 95250 … | |
| Online Games: Dai Guru Guru Onsen オンラインゲームズ 大ぐるぐる温泉 | PS2 | 1.01 | Original | | SLPM 62195 | |
| Onkel Alberts geheimnisvolles Notizbuch | PC | | Original | | | |
| Onimusha: Put' samuraya (Disc 4) Onimusha: Путь самурая | PC | | Original | | | |
| Onimusha: Put' samuraya (Disc 3) Onimusha: Путь самурая | PC | | Original | | | |
| Onimusha: Put' samuraya (Disc 2) Onimusha: Путь самурая | PC | | Original | | | |
| Onimusha: Put' samuraya (Disc 1) (Igrovoj) Onimusha: Путь самурая | PC | | Original | | | |
| Onimusha 3: Demon Siege (Disc 3) | PC | | Original | | 683100-CD3 | |
| Onimusha 3: Demon Siege (Disc 2) | PC | | Original | | 683100-CD2 | |
| Onimusha 3: Demon Siege (Disc 1) | PC | | Original | | 683100-CD1 | |
| Onikiri-den 鬼斬伝 | PC | | Original | | ZEUS-00001 | |
| Onii-chan Jushin-chuu お兄ちゃん受信中 | PC | | Original | | | |
| Onigunsou Kuramochi Yuzo no Yatchimasu: Spartan Manshu 鬼軍曹倉持勇造の殺っちます ~スパルタン満州~ | PC | | Original | | | |
| The Oni Taiji!!: Mezase! Nidaime Momotarou The鬼退治!! 目指せ!二代目桃太郎 | PSX | | Original | | SLPS 00089 | |
| Oni no Kamen 鬼ノ仮面 | PC | 1.00 | Original | | | |
| Oni | PS2 | 1.20 | Original | | SLUS-20064 | |
| Oni | PC | 1.0 | Original | | | |
| Oni | MAC | | Original | | | |
| Oni | PS2 | 1.02 | Original | | SLES-50179 | |
| Oni | PC | 1.00.000 | Original | | MTW-0390 | |
| Oni | PS2 | 1.02 | Original | | SLES-50178 | |
| Oni | PS2 | 1.02 | Original | | SLES-50177 | |
| Oni | PS2 | 1.02 | Original | | SLES-50176 | |
| Oni | PC | 1.0 | Original | | | |
| Oni 奥妮 | PC | 1.7 | Original | | | |
| OnHand Chess / Sega Swirl Lite | PALM | PDA103-01 | Original | | PDA103-01 | |
| Ongaku Tkool: Kanadeeru 2 音楽ツクール かなで~る2 | PSX | | Original | | SLPS 00903 | |
| Ongaku Tkool 3 音楽ツクール3 | PSX | | Original | | SLPS 03161 | |
| OnEscapee | ACD | | Original | | | |
| Onegai Countdown おねがいカウントダウン | PC | | Original | | YMH-0013 | |
| Onee-san to Issho! Kisekae Paradise お姉さんといっしょ! 着せ替え パラダイス | 3DO | | Original | | FZ-SJ5252 | |
| Onee-san to Issho! Janken Paradise お姉さんといっしょ! じゃんけん パラダイス | 3DO | | Original | | FZ-SJ5251 | |
| One Unit Whole Blood | PC | 1.21 | Original | | 04-16459CD1 | |
| One Two Animal: Let's Animal Series 1 ワンツーあにまる レッツあにまるシリーズ1 | PC | | Original | | LAOA-96101 | |
| One Piece Mansion | PSX | | Original | | SLUS-01406 | |
| One Piece Mansion ワンピースマンション | PSX | | Original | | SLPM 86837 | |
| One Piece Mansion | PSX | | Original | | SLES-03723 | |
| One Must Fall: Battlegrounds | PC | 2090 | Original | | | |
| One Must Fall: Battlegrounds | PC | 2090 | Original | | | |
| One Must Fall 2097 | PC | | Original | | EPOMF01 | |
| One Must Fall 2097 | PC | | Original | | EPOMF01 | |
| One Must Fall 2097 | PC | | Original | | | |
| One | PSX | | Original | | SLUS-00469 | |
| One ワン | PSX | | Original | | SLPS 01812 | |
| One | PSX | | Original | | SLES-00944 | |
| Ona: Sbornik e'roticheskix igr Она: Сборник эротических игр | PC | | Original | | 10-20999 | |
| On the Ball: World Cup Edition | PC | 1.00 | Original | | | |
| On the Ball: League Edition | PC | 1.0 | Original | | | |
| On Air | PC | | Original | | BROWNIE 990201 | |
| Omoide ni Kawaru Kimi: Memories Off 想い出にかわる君 ~Memories Off~ | DC | 1.001 | Original | | T-19718M | |
| Omizu no Hanamichi お水の花道 | PSX | | Original | | SLPS 02815 | |
| Omise de Tenshu おみせde店主 | PSX | | Original | | SLPS 01876 | |
| Ominous Horizons Ominous Horizons: A Paladin's Calling | PC | 1.0 | Original | | | |
| Omikron: The Nomad Soul (Disc 3) | PC | 1.0 | Original | | | |
| Omikron: The Nomad Soul (Disc 2) | PC | 1.0 | Original | | | |
| Omikron: The Nomad Soul (Disc 1) | PC | 1.0 | Original | | | |
| Omikron: The Nomad Soul | DC | 1.001 | Original | | T-36807N | |
| Omiai Commando: Ba-Couple ni Tsukkomi o お見合いコマンドー ~バカップルにつっこみを~ | PSX | | Original | | SLPM 86439 | |
| Omgaan met Steriele Medische Hulpmiddelen Omgaan met Steriele Medische Hulp-Middelen | CDI | | Original | | | |
| The Omega Stone: Secrets of the Ancients (Disc 4) | PC | | Original | | OMSTENCD4 | |
| The Omega Stone: Secrets of the Ancients (Disc 3) | PC | | Original | | OMSTENCD3 | |
| The Omega Stone: Secrets of the Ancients (Disc 2) | PC | | Original | | OMSTENCD2 | |
| The Omega Stone: Secrets of the Ancients (Disc 1) | PC | | Original | | OMSTENCD1 | |
| The Omega Stone: Riddle of the Sphinx II (Disc 4) | 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 2) | PC | 1.2.3.2 | Original | | | |
| The Omega Stone: Riddle of the Sphinx II (Disc 1) | PC | 1.2.3.2 | Original | | | |
| Omega Boost | PSX | | Original | | SCUS-94449 | |
| Omega Boost | PSX | | Original | | SCES-02120 | |
| Omega Assault | PSX | | Original | | SLES-04051 | |
| Omar Sharif Bridge | PC | 1.0 | Original | | | |
| Omakase! Savers おまかせ!退魔業 | SS | 1.002 | Original | | GS-9030 | |
| Olympic Summer Games | PSX | | Original | | SLUS-00148 | |
| Olympic Summer Games | 3DO | | Original | | FZ-SW0012 | |
| Olympic Soccer | SS | 2.000 | Original | | T-7904H | |
| Olympic Soccer | 3DO | | Original | | FZ-SW0011 | |
| Olympic Soccer | PSX | | Original | | SLUS-00156 | |
| Olympic Soccer オリンピックサッカー | SS | 1.002 | Original | | T-7304G | |
| Olympic Soccer オリンピックサッカー | PSX | | Original | | SLPS 00523 | |
| Olympic Soccer | SS | 2.000 | Original | | T-07904H-18 | |
| Olympic Soccer | SS | 2.000 | Original | | T-7904H-09, T-7904H-50 | |
| Olympic Soccer | PSX | | Original | | SLES-00113 | |
| Olympic Games: Atlanta 1996 | PC | | Original | | | |
| Olympic Games Olympic Games: Atlanta 1996 | PSX | | Original | | SLES-00110 | |
| Olympiad Qiaosai 2 奧林匹亞橋賽2 | PC | | Original | | | |
| Olympia, Yamasa: Virtua Pachi-Slot II: Jissen! Bishoujo Kouryakuhou オリンピア・山佐 バーチャパチスロⅡ ~実戦!美少女攻略法~ | PSX | | Original | | SLPS 00714 | |
| Olympia, Takasago: Virtua Pachi-Slot III オリンピア・高砂 バーチャ・パチスロⅢ | PSX | | Original | | SLPS 01386 | |
| Ollie King オーリーキング | CHIHIRO | 1.003 | Original | | GDX-0007 | |
| Olivers Äventyr: Drakens Förbannelse | PC | | Original | | 021120110 | |
| Olimpiada Zimowa 2002 Olimpijskie Zmagania 2002 | PC | | Original | | | |
| Oldtimer: Erlebte Geschichte Teil II | PC | | Original | | | |
| Oldtimer | ACD | | Original | | | |
| Oldtimer | PHOTO-CD | | Original | | 813 0067 | |
| Old El Paso Recipes for Family Fun | PC | | Original | | | |
| 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 | |
| Oktoberfest Wiesn-Gaudi | PC | 1.0 | Original | | | |
| Okigaru Igo Taikyoku お気軽囲碁対局 | PALM | | Original | | | |
| Okigaru Igo Taikyoku お気軽囲碁対局 | PPC | | Original | | | |
| Okashina Mother Goose: Mixed-Up Mother Goose おかしなマザー・グース | FMT | | Original | | HMB-235 | |
| Okappari-ou 陸釣王 | PSX | | Original | | SLPS 01524 | |
| Okano Software Classics: Volume 2 | PC | | Original | | | |
| Okage: Shadow King | PS2 | 1.01 | Original | | SCUS 97129 | |
| Ojousama Sousamou お嬢様捜査網 | PC-FX | | Original | | FXNHE616 | |
| Ojousama o Nerae!! お嬢様を狙え!! | SS | 1.003 | Original | | T-38101G | |
| Ojousama o Nerae!! お嬢様を狙え!! | SS | 1.002 | Original | | T-38101G | |
| Ojousama Express (Disc 2) お嬢様特急 | SS | 1.005 | Original | | T-27803G | |
| Ojousama Express (Disc 2) お嬢様特急 | PSX | | Original | | SLPS 01496 | |
| Ojousama Express (Disc 1) お嬢様特急 | SS | 1.005 | Original | | T-27803G | |
| Ojousama Express (Disc 1) お嬢様特急 | PSX | | Original | | SLPS 01495 | |
| Oja Majo DoReMi Dokkan! Nijiiro ParaDice おジャ魔女どれみドッカ~ン! にじいろパラダイス | PSX | | Original | | SLPS 03497 | |
| Oil Tycoon 2 | PC | | Original | | | |
| Oil Tycoon | PC | 1.01 | Original | | | |
| Oil Tycoon | PC | 1.0 | Original | | | |
| Oil Platform Simulator | PC | 1.0 | Original | | | |
| Oil of Ulay: Colour Collection: Colour Consultant | CDI | | Original | | | |
| Öhlins Hyper-Rally ハイパーラリー | PSX | | Original | | SLPS 00462 | |
| Oha Suta Series 02: Oha Ska! おはスタシリーズ02 おは スカ | KSITE | | Original | | 538714 | |
| Oha Suta Series 01: Zonapara おはスタシリーズ01 象南波羅~ゾナパラ~ | KSITE | | Original | | 536956 | |
| Oha Suta Dance Dance Revolution おはスタ ダンス ダンス レボリューション | PSX | | Original | | SLPM 86603 | |
| Oh! Bakyuuun オーバキューン | PSX | | Original | | SLPS 02680 | |
| 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 | | | |
| Oh-chan no Oekaki Logic 2 おーちゃんのお絵かきロジック2 | PSX | | Original | | SLPS 00345 | |
| Oh-chan no Oekaki Logic おーちゃんのお絵かきロジック | SS | 1.005 | Original | | T-1508G | |
| Oh Yes... More Worms! Volume 1 | ACD | | Original | | | |
| Oh No! オーノー! | PSX | | Original | | SLPS 02764 | |
| Ogura Hyakunin Isshu 小倉百人一首 | 3DO | | Original | | SV-0201 | |
| Ogre Battle: Limited Edition | PSX | | Original | | SLUS-00467 | |
| Ogallala: Das Kartenspiel für PC | PC | | Original | | ECD000799D 00031111-001 | |
| Offroad Extreme! Special Edition | PS2 | 1.00 | Original | | SLES-54109 | |
| Offroad Extreme! Special Edition | PC | | Original | | | |
| Offroad Extreme! | PS2 | 1.01 | Original | | SLES-52751 | |
| Offroad Off-Road Redneck Racing | PC | | Original | | ECD 000592K | |
| Offroad Off-Road Redneck Racing | PC | | Original | | OFFPCCDML | |
| Official Yarudora Fan Book: Yukiwari no Hana: CD-ROM Special Data-shuu オフィシャルやるドラファンブック 雪割りの花 | PSX | | Original | | SCZS 94104 | |
| Official Yarudora Fan Book: Sampaguita オフィシャルやるドラファンブック サンパギータ | PSX | | Original | | SCZS 94103 | |
| Official Yarudora Fan Book: Kisetsu o Dakishimete オフィシャルやるドラファンブック 季節を抱きしめて | PSX | | Original | | SCZS 94102 | |
| Official Yarudora Fan Book: Double Cast: CD-ROM Special Data-shuu オフィシャルやるドラファンブック ダブルキャスト | PSX | | Original | | SCZS 94101 | |
| The Official Guide to The Daedalus Encounter: Companion Disc | PC | | Original | | | |
| The Official Guide to Babylon 5 The Official Guide to J. Michael Straczynski's Babylon 5 | PC | | Original | | | |
| Official Formula 1 Racing | PC | | Original | | | |
| Official Fan Book: Circadia: Special CD-ROM オフィシャルファンブック サーカディア | PSX | | Original | | SCZS 94106 | |
| Official Duke Nukem 3D Level Design Handbook | PC | | Original | | 1869-0 | |
| The Office | PC | | Original | | | |
| Offensive | PC | | Original | | | |
| Off-World Interceptor Extreme | SS | 1.000 | Original | | T-15908H | |
| Off-World Interceptor Extreme | PSX | | Original | | SLUS-00020 | |
| Off-World Interceptor Extreme オフワールド・インターセプター エクストリーム | PSX | | Original | | SLPS 00122 | |
| Off-World Interceptor Extreme | SS | 1.000 | Original | | T-15908H-50 | |
| Off-World Interceptor Extreme | PSX | | Original | | SLES-00047 | |
| Off-World Interceptor | 3DO | | Original | | | |
| Off-World Interceptor 혹성질주 | 3DO | | Original | | GDT-GA241 | |
| Off-World Interceptor オフ‐ワールド・インターセプター | 3DO | | Original | | FZ-SJ3151 | |
| Off-Road: Wide Open Test Drive Off-Road: Wide Open | PS2 | 1.00 | Original | | SLES-50232 | |
| Off-Road Redneck Racing | PC | | Original | | CD-C98-1259-0 | |
| Off Road | PS2 | 1.01 | Original | | SLES-55032 | |
| Of Light and Darkness: The Prophecy (Disc 3) | PC | | Original | | CD-C95-166-2 | |
| Of Light and Darkness: The Prophecy (Disc 2) | PC | | Original | | CD-C95-166-1 | |
| Of Light and Darkness: The Prophecy (Disc 1) | PC | | Original | | CD-C95-166-0 | |
| Of Light and Darkness: The Prophecy (Disc 3) | PC | | Original | | | |
| Of Light and Darkness: The Prophecy (Disc 2) | PC | | Original | | | |
| Of Light and Darkness: The Prophecy (Disc 1) | PC | | Original | | | |
| Of Light and Darkness: The Prophecy (Disc 3) | PC | | Original | | CD-W95-166-E | |
| Of Light and Darkness: The Prophecy (Disc 2) | PC | | Original | | CD-W95-166-E | |
| Of Light and Darkness: The Prophecy (Disc 1) | PC | | Original | | CD-W95-166-E | |
| Oesterreichische Nationalbibliothek: Multimediale Enzyklopaedie auf 3 CD-i's (Disc 3) (Apokalypse) | CDI | | Original | | 0103313 | |
| Oesterreichische Nationalbibliothek: Multimediale Enzyklopaedie auf 3 CD-i's (Disc 2) (Sammlungen) | CDI | | Original | | 0103313 | |
| Oesterreichische Nationalbibliothek: Multimediale Enzyklopaedie auf 3 CD-i's (Disc 1) (Prunksaal/Impressionen) | CDI | | Original | | 0103313 | |
| Odyssey: The Search for Ulysses (Disc 2) | PC | | Original | | | |
| Odyssey: The Search for Ulysses (Disc 1) | PC | | Original | | | |
| Odyssey: The Search for Ulysses (Disc 2) | PC | | Original | | ODY-ENCD2 | |
| Odyssey: The Search for Ulysses (Disc 1) | PC | | Original | | ODY-ENCD1 | |
| Odyssey: The Legend of Nemesis | MAC | 1.0 | Original | | | |
| Odyssey (Disc 2) 奧德賽 | PC | | Original | | | |
| Odyssey (Disc 1) 奧德賽 | PC | | Original | | | |
| Odysseia ΟΔΥΣΣΕΙΑ | PC | 1.8 | Original | | | |
| Odyssee: Auf der Suche nach Odysseus (Disc 2) | PC | | Original | | ODY-GERCD2 | |
| Odyssee: Auf der Suche nach Odysseus (Disc 1) | PC | | Original | | ODY-GERCD1 | |
| ODS Robot Challenge | PC | | Original | | | |
| Odo Odo Oddity おどおどおっでぃ | PSX | | Original | | SLPS 00754 | |
| Odnazhdy' v Chikago Однажды в Чикаго | PC | 1.1.0.0 | Original | | | |
| ODN Palm Power Pack | PALM | | Original | | | |
| Odlikas za Prvake Одликаш за Прваке | PC | | Original | | | |
| Odium ōdi·um | PC | | Original | | CD-W58-1104-0 | |
| Odissea: Sulle tracce di Ulisse (Disc 2) | PC | | Original | | ODY-ITA-P02 | |
| Odissea: Sulle tracce di Ulisse (Disc 1) | PC | | Original | | ODY-ITA-P01 | |
| Odin Klik Один Клик | PC | | Original | | 301/2002 | |
| Odens Öga Odens Öga! | PC | 1.0.0 | Original | | | |
| Oddworld: L'Odyssée d'Abe | PC | | Original | | IB2G-ODDF5 | |
| Oddworld: L'Exode d'Abe (Disc 2) | PSX | | Original | | SLES-11502 | |
| Oddworld: L'Exode d'Abe (Disc 1) | PSX | | Original | | SLES-01502 | |
| Oddworld: Abe's Oddysee | PC | 2.0 | Original | | 04-12608CD | |
| Oddworld: Abe's Oddysee | PSX | | Original | | SLUS-00190 | |
| Oddworld: Abe's Oddysee | PSX | | Original | | SLES-00841 | |
| Oddworld: Abe's Oddysee | PSX | | Original | | SLES-00840 | |
| Oddworld: Abe's Oddysee | PC | 2.0 | Original | | IB2G-ODDG5 | |
| Oddworld: Abe's Oddysee | PC | 2.0 | Original | | IB2G-ODD5 | |
| Oddworld: Abe's Exoddus (Disc 2) | PSX | | Original | | SLUS-00731 … | |
| Oddworld: Abe's Exoddus (Disc 1) | PSX | | Original | | SLUS-00710 … | |
| Oddworld: Abe's Exoddus (Install) | PC | 2.0 | Original | | 04-15993CD1 | |
| Oddworld: Abe's Exoddus (Play) | PC | | Original | | 04-15993CD2 | |
| Oddworld: Abe's Exoddus (Disc 2) | PSX | | Original | | SLES-11505 | |
| Oddworld: Abe's Exoddus (Disc 1) | PSX | | Original | | SLES-01505 | |
| Oddworld: Abe's Exoddus (Disc 2) | PSX | | Original | | SLES-11503 | |
| Oddworld: Abe's Exoddus (Disc 1) | PSX | | Original | | SLES-01503 | |
| Oddworld: Abe's Exoddus (CD Installieren) | PC | 2.0 | Original | | | |
| Oddworld: Abe's Exoddus (CD Abspielen) | PC | 2.0 | Original | | | |
| Oddworld: Abe's Exoddus (Install Disc) | PC | 2.0 | Original | | | |
| Oddworld: Abe's Exoddus (Play Disc) | PC | 2.0 | Original | | | |
| Oddballz: Your Wacky Computer Petz | PC | 1.0 | Original | | CS090370 | |
| Oda Nobunaga Den 織田信長伝 | PC | 1.0 | Original | | KN11-93101 | |
| Ochigee Designer Tsukutte Pon! 落ちゲー・デザイナー 作ってポン! | SS | 1.090 | Original | | T-9108G | |
| Ochazukenori: Kaiki!! Mushi Danshaku no Yakata 御茶漬海苔 怪奇!!蟲男爵の館 | PC | | Original | | | |
| Oceans Below | 3DO | | Original | | | |
| Oceans Below The Software Toolworks Presents ... Oceans Below | MAC | | Original | | 2198620-590001 / I 073100, CDRM1103420 | |
| Oceans Below オーシャンズ・ビロウ | 3DO | | Original | | FZ-SJ2752 | |
| Oceans Below オーシャンズ・ビロウ | MAC | | Original | | MSC001 | |
| Ocean Commander | PS2 | 1.01 | Original | | SLES-55047 | |
| Obsidian: Alla Frontiera della Logica (Disc 5) | PC | 1.0.001 | Original | | | |
| Obsidian: Alla Frontiera della Logica (Disc 4) | PC | 1.0.001 | Original | | | |
| Obsidian: Alla Frontiera della Logica (Disc 3) | PC | 1.0.001 | Original | | | |
| Obsidian: Alla Frontiera della Logica (Disc 2) | PC | 1.0.001 | Original | | | |
| Obsidian: Alla Frontiera della Logica (Disc 1) | PC | 1.0.001 | Original | | | |
| Obsidian (Disc 5) | PC | | Original | | 11008 | |
| Obsidian (Disc 1) | PC | | Original | | 11008 | |
| Obsidian (Disc 5) オブシディアン | PC | 1.0 | Original | | INR-1003 | |
| Obsidian (Disc 5) オブシディアン | PC | | Original | | INR-1002 | |
| Obsidian (Disc 4) オブシディアン | PC | 1.0 | Original | | INR-1003 | |
| Obsidian (Disc 4) オブシディアン | PC | | Original | | INR-1002 | |
| Obsidian (Disc 3) オブシディアン | PC | 1.0 | Original | | INR-1003 | |
| Obsidian (Disc 3) オブシディアン | PC | | Original | | INR-1002 | |
| Obsidian (Disc 2) オブシディアン | PC | 1.0 | Original | | INR-1003 | |
| Obsidian (Disc 2) オブシディアン | PC | | Original | | INR-1002 | |
| Obsidian (Disc 1) オブシディアン | PC | 1.0 | Original | | INR-1003 | |
| Obsidian (Disc 1) オブシディアン | PC | | Original | | INR-1003 | |
| Obsidian (Disc 5) | PC | | Original | | | |
| Obsidian (Disc 4) | PC | | Original | | | |
| Obsidian (Disc 3) | PC | | Original | | | |
| Obsidian (Disc 2) | PC | | Original | | | |
| Obsidian (Disc 1) | PC | | Original | | | |
| ObsCure (Disc 5) | PC | 1.0 | Original | | PCO457CD | |
| ObsCure (Disc 4) | PC | 1.0 | Original | | PCO457CD | |
| ObsCure (Disc 3) | PC | 1.0 | Original | | PCO457CD | |
| ObsCure (Disc 2) | PC | 1.0 | Original | | PCO457CD | |
| ObsCure (Disc 1) | PC | 1.0 | Original | | PCO457CD | |
| ObsCure (Disc 4) | PC | | Original | | | |
| ObsCure (Disc 3) | PC | | Original | | | |
| ObsCure (Disc 2) | PC | | Original | | | |
| ObsCure (Disc 1) | PC | | Original | | | |
| ObsCure (Disc 4) 惊悚空间 | PC | 1.0 | Original | | | |
| ObsCure (Disc 3) 惊悚空间 | PC | 1.0 | Original | | | |
| ObsCure (Disc 2) 惊悚空间 | PC | 1.0 | Original | | | |
| ObsCure (Disc 1) 惊悚空间 | PC | 1.0 | Original | | | |
| Obliterate | PS2 | 1.01 | Original | | SLES-53355 … | |
| Objectif Transparence | CDI | | Original | | RP IND 4 94 | |
| Objectif Transparence | CDI | | Original | | RP IND 4 94 | |
| Obitel' T'my Обитель Тьмы | PC | 5.02 04/07/03 | Original | | | |
| Obaachan no Chiebukuro おばあちゃんの知恵袋 | FMT | | Original | | HMC-169 | |
| Ob"ekt 69: Mest' Krassera Объект 69: Месть Крассера | PC | | Original | | | |
| Ob"ekt 69: Kasablanka Объект 69: Касабланка | PC | | Original | | RUSSOBIT-M 2003/408 | |
| OASYS/Win V2.0 | FMT | | Original | | B28C7020 | |
| Oasis Road オアシスロード | PSX | | Original | | SLPS 01899 | |
| O'boy-jakten | PC | | Original | | | |
| O.R.B: Off-World Resource Base | PC | 1.0 | Original | | 22434CD | |
| O.D.T. | PSX | | Original | | SLUS-00698 | |
| O.D.T. | PSX | | Original | | SLES-01412 | |
| O.D.T. | PSX | | Original | | SLES-01411 | |
| O.D.T. | PC | | Original | | | |
| O.D.T. | PSX | | Original | | SLES-01410 | |
| O.D.T. | PSX | | Original | | SLES-01409 | |
| O.D.T. | PSX | | Original | | SLES-01391 | |
| O.D.T. | PC | | Original | | | |
| O-to-i-re: Dreamcast Sequencer お・と・い・れ ドリームキャストシーケンサー | DC | 1.002 | Original | | T-32801M | |
| O Xephteris Taxideuei stin Ellada Ο Ξεφτέρης ταξιδεύει στην Ελλάδα | PC | | Original | | | |
| Overboard! | PSX | | Original, 1998 4 PlayStation Multi Pack | | SLES-00865 | |
| Oddworld: L'Odyssée d'Abe | PSX | | Original, Best of Infogrames | | SLES-00838 … | |
| Obsidian (Disc 5) | PC | | Original, Complimentary Copy | | 11008 | |
| Obsidian (Disc 4) | PC | | Original, Complimentary Copy | | 11008 | |
| Obsidian (Disc 3) | PC | | Original, Complimentary Copy | | 11008 | |
| Obsidian (Disc 2) | PC | | Original, Complimentary Copy | | 11008 | |
| Obsidian (Disc 1) | PC | | Original, Complimentary Copy | | 11008 | |
| L'Open de Palm Springs | CDI | | Original, For Demonstration Only | | 812 0002 | |
| Othello World II: Yume to Michi e no Chousen オセロワールドII 夢と未知への挑戦 | PSX | | Original, Fukkokuban | | SLPS 00136 … | |
| Operation Flashpoint: Gold Upgrade | PC | 1.30 | Original, Gold Edition | | MOFUCDEU00, MOFUCDUS00 | |
| Operation Flashpoint: Cold War Crisis | PC | 1.0 | Original, Gold Edition | | MOPFCDEU00 | |
| Obsidian (Disc 5) | MAC | | Original, Great Series | | INR-001, MKM-001 | |
| Obsidian (Disc 4) | MAC | | Original, Great Series | | INR-001, MKM-001 | |
| Obsidian (Disc 3) | MAC | | Original, Great Series | | INR-001, MKM-001 | |
| Obsidian (Disc 2) | MAC | | Original, Great Series | | INR-001, MKM-001 | |
| Obsidian (Disc 1) | MAC | | Original, Great Series | | INR-001, MKM-001 | |
| Oddworld: Abe's Oddysee | PSX | Rev 1 | Original, Greatest Hits | | SLUS-00190 | |
| Oda Nobunaga Den 織田信長伝 | PSX | | Original, Koei the Best | | SLPM 86337 … | |
| Oni | PS2 | 1.02 | Original, Platinum | | SLES-50134 … | |
| Oddworld: Abe's Exoddus (Disc 2) | PSX | | Original, Platinum | | SLES-11504 … | |
| Oddworld: Abe's Exoddus (Disc 1) | PSX | | Original, Platinum | | SLES-01504 … | |
| Oddworld: Abe's Exoddus (Disc 2) | PSX | | Original, Platinum | | SLES-11480 … | |
| Oddworld: Abe's Exoddus (Disc 1) | PSX | | Original, Platinum | | SLES-01480 … | |
| Oddworld: Abe's Oddysee | PSX | | Original, Platinum, Best of Infogrames: Value Series, Best of Infogrames: Adventure | | SLES-00664 … | |
| OverBlood オーバーブラッド | PSX | | Original, PlayStation the Best | | SLPS 00392 … | |
| Ore no Ryouri 俺の料理 | PSX | | Original, PlayStation the Best | | SCPS 10099 … | |
| Ore no Shikabane o Koete Yuke 俺の屍を越えてゆけ | PSX | | Original, PlayStation the Best, PSone Books, PSone Books (Silver Disc) | | SCPS 10074 … | |
| Omega Boost オメガ・ブースト | PSX | | Original, Preview | | SCPS 10020 | |
| Oumagatoki 逢魔が時 | PSX | | Original, PSone Books | | SLPS 03235 … | |
| 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 | |
| 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 | |
| Oregon Trail II: 25th Anniversary Limited Edition | PC | 1.3 | Original, SoftKey | | #OTR744AE-CD | |
| Odell Down Under | PC | | Original, SoftKey | | POD544AE-CD | |
| Oh-chan no Oekaki Logic おーちゃんのお絵かきロジック | PSX | | Original, SunColle Best, Value 1500 | | SLPS 00093 … | |
| Oshigoto-shiki Jinsei Game: Mezase Shokugyou King お仕事式人生ゲーム めざせ職業王 | PSX | | Original, The Best Takaramono | | SLPM 87316 … | |
| Oukyuu no Hihou Tension 王宮の秘宝 テンション | PSX | | Original, VAP Best Thanks 1800 | | SLPS 00438 … | |
| Oni | PC | 1.0 | PC Best Buy | | 177588 | |
| Oddworld: Abe's Oddysee | PSX | | Platinum | | SLES-00839 | |
| Outcast (Disc 2) | PC | | Play the Games Vol. 3 | | | |
| Outcast (Disc 1) | PC | | Play the Games Vol. 3 | | | |
| 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 | |
| Oumagatoki 逢魔が時 プレミアム"FAN"ディスク | PSX | | Premium Fan Disc | | SLPM 80623 | |
| Official Lara Croft: Real Life '99 Lara: Character Images | PC | | Press Kit | | | |
| Oct 15 2002 | PC | | Press Kit | | | |
| Omikron: The Nomad Soul | PC | | Promo | | | |
| Ocean Jewels | PC | | Red Rocks | | | |
| Oyaji no Jikan: Nee-chan Mahjong de Shoubu ya! おやじの時間 ~ねーちゃん麻雀で勝負や!~ | PSX | | Renkaban | | SLPS 03262 | |
| 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 | |
| Oz: The Magical Adventure | PC | 7.0.0.198 | Rerelease | | 92785 | |
| Outpost | PC | 1.1 | Rerelease | | S725431 | |
| Outlaws (Disc 2) | PC | 2.0 | Rerelease | | 9511831 | |
| Outlaws (Disc 2) | PC | 2.0 | Rerelease | | 9511831 | |
| Outlaws (Disc 2) | PC | 2.0 | Rerelease | | 9511831 | |
| Outlaws (Disc 1) | PC | 2.0 | Rerelease | | 9511830 | |
| Outlaws (Disc 1) | PC | 2.0 | Rerelease | | 9511830 | |
| Outlaws (Disc 1) | PC | 2.0 | Rerelease | | 9511830 | |
| Outlaws (Disc 2) | PC | 1.1 | Rerelease | | | |
| Outlaws (Disc 1) | PC | 1.1 | Rerelease | | | |
| Out of This World | PC | | Rerelease | | CD-MMC-023-0 | |
| Oregon Trail II | PC | 1.32 | Rerelease | | #HCD744CE-CD | |
| Oregon Trail II | PC | 1.31 | Rerelease | | #HCD744AE-CD | |
| Oregon Trail II | PC | 1.31 | Rerelease | | HCD744BE-CD | |
| The Oregon Trail 4th Edition (Disc 3) | PC | 1.1 | Rerelease | | OTF744BE-CD3 | |
| The Oregon Trail 4th Edition (Disc 2) | PC | 1.1 | Rerelease | | OTF744BE-CD2 | |
| The Oregon Trail 4th Edition (Disc 2) | PC | 1 | Rerelease | | OTF744CE-CD2 | |
| The Oregon Trail 4th Edition (Disc 1) | PC | 1.1 | Rerelease | | OTF744BE-CD1 | |
| The Oregon Trail 3rd Edition: Pioneer Adventures (Disc 1) | PC | 1.2 | Rerelease | | OTA744BE-CD1 | |
| Optimum Resource Sampler | PC | | Rerelease | | | |
| One Must Fall 2097 One Must Fall | PC | | Rerelease | | D.L.: M-8684-97 | |
| Outpost | PC | 1.5 | Rerelease, Sierra Originals | | | |
| The Oregon Trail 5th Edition: Adventures Along the Oregon Trail | PC | 1.1 | Rerelease, Southwestern School Set | | 380859B-CD | |
| OverKill | PC | | ROMWARE | | ROM 10 007 | |
| One Must Fall 2097 One Must Fall 2097 CD-ROM | PC | 1.1 | ROMWARE | | ROM 10017 | |
| Off Limits: Mizar | PC | | ROMWARE | | ROM 10120 | |
| Off Limits: Cassiopeia | PC | | ROMWARE | | ROM 10100 | |
| The Oregon Trail 5th Edition: Adventures Along the Oregon Trail | PC | 1.0 | Scholastic | | 380859-CD WP2 | |
| Outpost | PC | 1.51 | Schweinepreise | | S390122CZ12ZZ | |
| Only You: Seikimatsu no Juliet-tachi Only You ~世紀末のジュリエットたち~ | FMT | | Shokai Gentei | | | |
| Outpost 2: Divided Destiny | PC | | SierraOriginals | | | |
| Outpost | PC | | SierraOriginals | | S4941220Z12Z2 | |
| The Oregon Trail | PC | 3.0.1 | Slash | | CDRM1239790 | |
| The Oregon Trail | PC | 1.22 | Smart Saver | | ORT844AE-CD | |
| Oregon Trail II | PC | 1.3 | Smart Saver | | 0TT744AE-CD | |
| Oregon Trail II | PC | 1.3 | Smart Saver | | 381032-CD/i401ha | |
| The Oregon Trail: Classic Edition | PC | 3.0.1 | SoftKey | | POT144CE-CD | |
| The Oregon Trail: Classic Edition | PC | | SoftKey | | POT144BE-CD | |
| The Oregon Trail: Classic Edition | PC | | SoftKey | | POT144EE-CD | |
| Outlaw Racers | PC | | Sold Out Software | | | |
| Operation: Surgery Has Never Been so Silly! | PC | | Sold Out Software | | | |
| Operation Flashpoint: Cold War Crisis | PC | 1.46 | Sold Out Software | | | |
| Operation Flashpoint: Cold War Crisis | PC | 1.46 | 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 … | |
| Oblivious Garden: Carmina Burana (Disc 2) (Music Disc) | PC | | Standard Edition | | | |
| Oh-chan no Oekaki Logic 2 おーちゃんのお絵かきロジック2 | PSX | Rev 1 | SunColle Best, Value 1500 | | SLPS 02145 … | |
| Otostaz オトスタツ | PS2 | 1.00 | Taikenban | | PAPX 90228 | |
| Otostaz オトスタツ | PS2 | 1.00 | Taikenban | | PAPX 90226 | |
| Otostaz オトスタツ | PS2 | 1.00 | Taikenban | | SCPS 11020 | |
| Otome Koigokoro Prister 乙女恋心プリスター体験版 | PC | | Taikenban | | | |
| Osananajimi wa Pet Yakuza! 幼なじみはペットヤクザ!体験版 | PC | | Taikenban | | | |
| Ore! Tomba オレっ!トンバ | PSX | | Taikenban | | SLPM 80165 | |
| 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 | |
| One Piece Mansion ワンピースマンション | PSX | | Taikenban | | SLPM 80617 | |
| Omega Boost オメガ・ブースト | PSX | | Taikenban | | PAPX 90080 | |
| Ojousama Express お嬢様特急 | PSX | | Taikenban | | SLPM 80255 | |
| 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 | |
| Opera Fatal | PC | | Tandem | | 1444 | |
| ODS Robot Challenge | PC | 5.0.1r26 | Teacher's Edition | | | |
| ODS Carnival Math | PC | 5.0r134 | Teacher's Edition | | | |
| ODS Carnival Math | PC | 5.0r134 | Teacher's Edition | | | |
| ODS Amazing Art Corner | PC | 5.0r134 | Teacher's Edition | | | |
| ODS Air Explorer | PC | 5.0r134 | Teacher's Edition | | | |
| ODS Air Explorer | PC | 5.0r134 | 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 3) | PC | 1.3 | The Learning Company | | OAE744BE-CD3 | |
| 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 1) | PC | 1.3 | The Learning Company | | OAE744BE-CD1 | |
| One Must Fall 2097 | PC | 2.1 | The Smile Edition | | CDR3016 | |
| Oddworld: Abe's Oddysee | PSX | | Trade Demo | | | |
| Orion's Puzzle Collection | DC | 1.000 | Unlicensed | | | |
| OnSide Soccer | 3DO | | Unlicensed (oldergames, Good Deal Games Double Header! Two Game Set) | | | |
| Oh-chan no Oekaki Logic 3 おーちゃんのお絵かきロジック3 | PSX | | Value 1500 | | SLPS 03134 | |
| Out of This World | PC | | Valueware | | CD-ICD-142-0 | |
| Omar Sharif on Bridge | PC | | Valueware | | CD-ICD-148-0 | |
| Operation Wolf オペレーション・ウルフ | FMT | 1.00 | Ving Vol. 3 | | HMB-126 | |
| The Operational Art of War II | PC | 1.01.02 | Xplosiv | | EI-1259-3 | |