Region | Title | System | Version | Edition | Languages | Serial | Status |
| O Xephteris Taxideuei stin Ellada Ο Ξεφτέρης ταξιδεύει στην Ελλάδα | PC | | Original | | | |
| O.R.B: Off-World Resource Base | PC | | Covermount | | | |
| O.R.B.: Orbital'nye Resursnye Bazy О.Р.Б.: Орбитальные Ресурсные Базы | PC | 1.03 | 1C: Kollekciya igrushek | | | |
| Ob"ekt 69: Mest' Krassera Объект 69: Месть Крассера | PC | | Original | | | |
| Obbligato (Taikenban CD-ROM) オブリガート 体験版CD-ROM | PC | | Demo | | | |
| 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 | | | |
| Oblivious Garden: Carmina Burana (Disc 1) (Game Disk) | PC | 1.0 | Standard Edition | | | |
| Oblivious Garden: Carmina Burana (Disc 2) (Music Disc) | PC | | Standard Edition | | | |
| Obratnyj otschet Обратный отсчет | PC | v.1 1.06.10.22 | Original | | | |
| Obrońca | PC | | FajnaGra.pl | | | |
| ObsCure (Disc 1) 惊悚空间 | PC | 1.0 | Original | | | |
| ObsCure (Disc 2) 惊悚空间 | PC | 1.0 | Original | | | |
| ObsCure (Disc 3) 惊悚空间 | PC | 1.0 | Original | | | |
| ObsCure (Disc 4) 惊悚空间 | PC | 1.0 | Original | | | |
| ObsCure | PC | | Original | | | |
| ObsCure | PC | | Software Pyramide | | | |
| ObsCure | PC | | Best of Atari | | | |
| ObsCure | PC | 1.1 | Covermount | | | |
| ObsCure (Disc 1) | PC | | Original | | | |
| ObsCure (Disc 2) | PC | | Original | | | |
| ObsCure (Disc 3) | PC | | Original | | | |
| ObsCure (Disc 4) | PC | | Original | | | |
| ObsCure II | PC | | Original | | | |
| ObsCure II | PC | 1.0 | Covermount | | | |
| ObsCure II | PC | 1.0.0.0 | Original | | | |
| ObsCure: The Aftermath | WII | | Beta | | | |
| Obsidian: Alla Frontiera della Logica (Disc 1) | PC | 1.0.001 | Original | | | |
| Obsidian: Alla Frontiera della Logica (Disc 2) | PC | 1.0.001 | Original | | | |
| Obsidian: Alla Frontiera della Logica (Disc 3) | PC | 1.0.001 | Original | | | |
| Obsidian: Alla Frontiera della Logica (Disc 4) | PC | 1.0.001 | Original | | | |
| Obsidian: Alla Frontiera della Logica (Disc 5) | PC | 1.0.001 | Original | | | |
| Ocean/Infogrames Show Case December 1997 | PC | | | | | |
| Ochazukenori: Kaiki!! Mushi Danshaku no Yakata 御茶漬海苔 怪奇!!蟲男爵の館 | PC | | Original | | | |
| Oddworld: Abe's Exoddus (Install Disc) | PC | 2.0 | Original | | | |
| Oddworld: Abe's Exoddus (Play Disc) | PC | 2.0 | Original | | | |
| Oddworld: Abe's Exoddus (CD Installieren) | PC | 2.0 | Original | | | |
| Oddworld: Abe's Exoddus (CD Abspielen) | PC | 2.0 | Original | | | |
| Oddworld: Abe's Exoddus (Disc 1) | PC | 1.0 | Covermount | | | |
| Oddworld: Abe's Exoddus (Disc 2) | PC | 1.0 | Covermount | | | |
| Oddworld: Abe's Exoddus: UK Packaging | MAC | | Art Assets | | | |
| Oddworld: Abe's Exoddus: US Manual | MAC | | Art Assets | | | |
| Oddworld: Abe's Oddysee | PSX | | Trade Demo | | | |
| Oddworld: Abe's Origins | PC | | Limited Run Games | | | |
| Odlikas za Prvake Одликаш за Прваке | PC | | Original | | | |
| ODN Palm Power Pack | PALM | | Original | | | |
| 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 | | Original | | | |
| ODS Robot Challenge | PC | 5.0.1r26 | Teacher's Edition | | | |
| Odyssey: The Search for Ulysses (Disc 1) | PC | | Original | | | |
| Odyssey: The Search for Ulysses (Disc 2) | PC | | Original | | | |
| Of Light and Darkness: The Prophecy (Disc 1) | PC | | Original | | | |
| Of Light and Darkness: The Prophecy (Disc 2) | PC | | Original | | | |
| Of Light and Darkness: The Prophecy (Disc 3) | PC | | Original | | | |
| Off-World Interceptor | 3DO | | Original | | | |
| Offensive Offensive War: The Ultimate Strategical Combat Game | PC | | Covermount | | | |
| The Official Browser of Primagames.com | PC | | | | | |
| Official Formula 1 Racing | PC | | Original | | | |
| The Official Guide to Babylon 5 The Official Guide to J. Michael Straczynski's Babylon 5 | PC | | Original | | | |
| The Official Guide to The Daedalus Encounter: Companion Disc | PC | | Original | | | |
| Official Lara Croft: Real Life '99 Lara: Character Images | PC | | Press Kit | | | |
| Official Sega Dreamcast Magazine Vol. 11: February 2001 | DC | 0.500 | | | | |
| Official Sega Dreamcast Magazine Vol. 5: May 2000 | DC | 1.010 | | | | |
| Official Sega Dreamcast Magazine: Special Edition Preview PC CD-ROM | PC | | | | | |
| Offroad Extreme! Special Edition | PC | | Original | | | |
| Oficery: Special'noe izdanie Офицеры: Специальное издание | PC | 1.18.2 | Original | | | |
| Ognisty Podmuch: Fire Captain (Disc 1) (Dysk Instalacyjny) | PC | | Covermount | | | |
| Ognisty Podmuch: Fire Captain (Disc 2) (Dysk z Grą) | PC | | Covermount | | | |
| Oh Yes... More Worms! Volume 1 | ACD | | Original | | | |
| 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!X 1998 Spring Special CD-ROM (Part 1) | X68K | | | | | |
| Oh!X 1998 Spring Special CD-ROM (Part 2) (Sampler Disc) | X68K | | | | | |
| Oh!X 1999 Spring Special CD-ROM (Part 1) | X68K | | | | | |
| Oh!X 1999 Spring Special CD-ROM (Part 2) (Sampler Disc) | X68K | | | | | |
| Oh!X 1999 Summer Special CD-ROM | X68K | | | | | |
| Oh!X 2000 Spring Special CD-ROM (Part 1) | X68K | | | | | |
| Oh!X 2000 Spring Special CD-ROM (Part 2) | X68K | | | | | |
| Oh!X 2001 Spring Special CD-ROM | X68K | | | | | |
| Ohio Distinctive Software Vol. I | PC | | | | | |
| Oil of Ulay: Colour Collection: Colour Consultant | CDI | | Original | | | |
| Oil Platform Simulator | PC | 1.0 | Original | | | |
| Oil Rush | PC | | Original | | | |
| OIO: The Game: Enlarged | PC | | F*ckn' Best of Independent Games: Collection Vol. 1 | | | |
| Okano Software Classics: Volume 2 | PC | | 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 | | | |
| Oktoberfest Wiesn-Gaudi | PC | 1.0 | Original | | | |
| Old El Paso Recipes for Family Fun | PC | | Original | | | |
| Oldtimer | ACD | | Original | | | |
| Oldtimer: Erlebte Geschichte Teil II | PC | | Original | | | |
| Ollo en de Reuzentomaat | PC | | CD-ROM Topper | | | |
| Olympic Soccer | PC | | Kixx | | | |
| Olympic Soccer | PC | | CD-ROM Classic Collection 2 | | | |
| Omar Sharif Bridge | PC | 1.0 | Original | | | |
| 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 | | | |
| Omgaan met Steriele Medische Hulpmiddelen Omgaan met Steriele Medische Hulp-Middelen | CDI | | Original | | | |
| Omgaan met Steriele Medische Hulpmiddelen | CDI | | Demo | | | |
| Omikron: The Nomad Soul | PC | | Promo | | | |
| Omikron: The Nomad Soul (Disc 1) | PC | 1.0 | Original | | | |
| Omikron: The Nomad Soul (Disc 2) | PC | 1.0 | Original | | | |
| Omikron: The Nomad Soul (Disc 3) | PC | 1.0 | Original | | | |
| Ominous Horizons Ominous Horizons: A Paladin's Calling | PC | 1.0 | Original | | | |
| OMSI Add-on: Wien: Der Hochflurbus LU 200 | PC | 1.0 | OMSI Bundle | | | |
| OMSI: Der Omnibussimulator | PC | 1.04 | OMSI Bundle | | | |
| On the Ball: World Cup Edition | PC | 1.00 | Original | | | |
| On-Robot Он-Робот | PC | 1.14SB | 1C: Igrushki | | | |
| One Must Fall: Battlegrounds | PC | 2090 | Original | | | |
| One Must Fall: Battlegrounds | PC | 2090 | Original | | | |
| One-derful Theater ONEだふるシアター | X68K | | | | | |
| 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 | | | |
| Onimusha: Put' samuraja Onimusha: Путь самурая | PC | | Original | | | |
| Onimusha: Put' samuraya (Disc 1) (Igrovoj) Onimusha: Путь самурая | PC | | Original | | | |
| Onimusha: Put' samuraya (Disc 2) Onimusha: Путь самурая | PC | | Original | | | |
| Onimusha: Put' samuraya (Disc 3) Onimusha: Путь самурая | PC | | Original | | | |
| Onimusha: Put' samuraya (Disc 4) Onimusha: Путь самурая | PC | | Original | | | |
| Onkel Alberts geheimnisvolles Notizbuch | PC | | Original | | | |
| Online G@mer n. 5: Juin/Juillet 2001 (Disc 1) | PC | | | | | |
| Only Fun: Entra anche tu nel mondo dei Videogames | PC | | | | | |
| Onsalakorv | PC | | Original | | | |
| OnSide Soccer | 3DO | | Unlicensed (oldergames, Good Deal Games Double Header! Two Game Set) | | | |
| Ontdek de Interactieve Wereld van Neckermann | CDI | | Original | | | |
| Oozora ni Kodawarou! Minna no Kuukou 2 大空にこだわろう! みんなの空港2 | PC | | | | | |
| Op Jacht naar Vernuft | CDI | | | | | |
| Opel Corsa '97 | PHOTO-CD | | Original | | | |
| Opel Vectra '99 | PHOTO-CD | | Original | | | |
| Open Kart | PC | | I Videogiochi del "Giornalino" | | | |
| Opera House Preview Disc オペラハウス プレビューディスク | PC | | Original | | | |
| Opera House Preview Disc #2 オペラハウス プレビューディスク #2 | PC | | Original | | | |
| Opera House Preview Disc #2.3 オペラハウス プレビューディスク #2.3 | PC | | Original | | | |
| Operaciya "Barbarossa" Операция "Барбаросса" | PC | | Original | | | |
| Operaciya "Blau" Операция "Блау" | PC | | Original | | | |
| Operaciya "Plastilin" (Disc 1) Операция "Пластилин" | PC | | Original | | | |
| Operaciya "Plastilin" (Disc 2) Операция "Пластилин" | PC | | Original | | | |
| Operaciya Bagration Операция Багратион | PC | | Original | | | |
| 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 | | | |
| Operaciya Silent Storm: Chasovye (Disc 1) Операция Silent Storm: Часовые | PC | | 1С: Igroteka | | | |
| Operaciya Silent Storm: Chasovye (Disc 2) Операция Silent Storm: Часовые | PC | | 1С: Igroteka | | | |
| Operation | PC | | General Mills | | | |
| Operation Barbarossa: The Struggle for Russia | PC | | Original | | | |
| Operation Body Count | PC | | Original | | | |
| Operation Body Count: One Level Preview | PC | | Original | | | |
| Operation Europe: Path to Victory 1939-45 | PC | | Original | | | |
| Operation Flashpoint: Cold War Crisis | PC | 1.46 | Sold Out Software | | | |
| Operation Flashpoint: Cold War Crisis | PC | 1.46 | Sold Out Software | | | |
| Operation Flashpoint: Cold War Crisis | PC | | The Games Collection | | | |
| Operation Flashpoint: Gold Upgrade Operace Flashpoint: Gold Upgrade | PC | | Original | | | |
| Operation Flashpoint: Holodnaja vojna Операция Flashpoint: Холодная война | PC | 1.46 | Original | | | |
| Operation Flashpoint: Soprotivlenie Operation Flashpoint: Сопротивление | PC | 1.85 | | | | |
| Operation Mittelmeer | PC | | Original | | | |
| Operation Neptune + Reader Rabbit 2 Deluxe! + Ultimate Writing & Creativity Center The Learning Company 3-in-1 | PC | | | | | |
| Operation Thunderstorm | PC | 1.0 | Original | | | |
| Operation: Surgery Has Never Been so Silly! | PC | | Sold Out Software | | | |
| The Operational Art of War II: 1956-2000 The Operational Art of War II: Bewaffnete Konflikten | PC | | Original | | | |
| The Operational Art of War: Century of Warfare | PC | | Original | | | |
| The Operative: No One Lives Forever (Disc 1) | PC | 1.0.0.4 | Game of the Year Edition (Covermount) | | | |
| The Operative: No One Lives Forever (Disc 1) ノーワンリブスフォーエバー | PC | 1.004, 1.004J | Original | | | |
| The Operative: No One Lives Forever (Disc 2) ノーワンリブスフォーエバー | PC | 1.004, 1.004J | Original | | | |
| The Operative: No One Lives Forever (Disc 1) | PC | 1.0 | Original | | | |
| The Operative: No One Lives Forever (Disc 1) (Game Disc) | MAC | 1.004 | MacPlay | | | |
| The Operative: No One Lives Forever (Disc 1) | PC | 1.004 | Game of the Year Edition | | | |
| The Operative: No One Lives Forever (Disc 2) | PC | 1.0 | Original | | | |
| Opowieści z Narnii: Książe Kaspian | PC | | Covermount | | | |
| Opowieści z Narnii: Lew, Czarownica i Stara Szafa (Disc 1) | PC | | Original | | | |
| Opowieści z Narnii: Lew, Czarownica i Stara Szafa (Disc 2) | PC | | Original | | | |
| Opowieści z Narnii: Lew, Czarownica i Stara Szafa (Disc 3) | PC | | Original | | | |
| Opowieści z Narnii: Lew, Czarownica i Stara Szafa (Disc 4) | PC | | Original | | | |
| OptImage CD-I Starter System: Sampler Disc: Version 1.1 | CDI | | | | | |
| Optimum Resource Sampler | PC | | Rerelease | | | |
| Optimum Resource Sampler | PC | | Original | | | |
| The Orange Box (Disc 1) | PC | | Rerelease | | | |
| The Orange Box (Disc 1) | PC | | Rerelease | | | |
| The Orange Box (Disc 1) | PC | | Original | | | |
| The Orange Box (Disc 2) | PC | | Rerelease | | | |
| The Orange Box (Disc 2) | PC | | Rerelease | | | |
| The Orange Box (Disc 2) | PC | | Original | | | |
| Orbatak | 3DO | | Arcade CD-ROM | | | |
| Orda: Severnyj veter Орда: Северный ветер | PC | | Original | | | |
| Order of War: Osvobozhdenie Order of War: Освобождение | PC | | Igromaniya: Vybor redakcii | | | |
| Order of War: Stolknovenie Order of War: Столкновение | PC | | Igromaniya: Vybor redakcii | | | |
| Order Up! | WII | | Beta | | | |
| Oregano Oregano: RISC OS Web Browser | ARCH | | Original | | | |
| The Oregon Trail 3rd Edition: Pioneer Adventures (Disc 1) | PC | 1.2a | Bundle Version Compaq Presario OEM | | | |
| Oregon Trail II | PC | 1.0 | Original | | | |
| Oregon Trail II + Logic Quest | PC | 1.2/1.0 | Original | | | |
| The Oregon Trail | PC | 1.0 | Original | | | |
| The Oregon Trail | PC | 1.21 | | | | |
| Ori and the Blind Forest: Definitive Edition | PC | 5.3.2.9582331 | Limited Edition | | | |
| The Original Links | PC | | Solid Gold Edition | | | |
| Die Original Moorhuhn Jagd | PC | | Best of Moorhuhn | | | |
| The Original Mulan 花木兰 | PC | | Original | | | |
| Original War (Disc 1) | PC | | Original | | | |
| Original War (Disc 2) | PC | | Original | | | |
| Original War (Disc 1) | PC | 1.02 | Covermount | | | |
| Original War (Disc 2) | PC | 1.02 | Covermount | | | |
| Original War (Disc 1) (Install Disc) オリジナル ウォー | PC | 1.02 | Original | | | |
| Original War (Disc 2) (GameDisc) オリジナル ウォー | PC | 1.02 | Original | | | |
| Original Xbox Game Support: August 2006 (1.5) | XBOX360 | | | | | |
| Original Xbox Game Support: December 2005 (1.2) Prise en charge des jeux Xbox d'origine: Décembre 2005 (1.2) | XBOX360 | | Original | | | |
| Orion Burger | PC | | Original | | | |
| The Orion Conspiracy | PC | 1.01 | Original | | | |
| Orion's Puzzle Collection | DC | 1.000 | Unlicensed | | | |
| Orly Pervoj mirovoj Орлы Первой мировой | PC | 02.19.07 | Original | | | |
| Orly's Draw-A-Story | PC | | Original | | | |
| Oro e Gloria: La Strada per El Dorado | PC | | Covermount | | | |
| Oro Negro: Juego de Guerra y Estrategia | PC | | Covermount | | | |
| Ortofrajda | PC | | | | | |
| Oscar | PC | | Golden Zone | | | |
| Oscar | PC | | Original | | | |
| Oscar | PC | | Jackson Libri | | | |
| Oscar der Ballonfahrer und die Geheimnisse des Waldes | PC | | | | | |
| Oscar the Balloonist: Discovers the Farm 小小探險家奧斯卡 農場奇遇記 | PC | | Original | | | |
| OSHA MHE Forklifts OSHA MHE Forklifts: PFS Interactive Training | CDI | | Original | | | |
| Osobennosti nacional'nogo razvoda (Disc 1) Особенности национального развода | PC | | Original | | | |
| Osobennosti nacional'nogo razvoda (Disc 2) Особенности национального развода | PC | | Original | | | |
| Osterreichs Werbepreise: Vier Highlights | CDI | | Original | | | |
| Osterspiele-Box Oster Spielebox | PC | | Original | | | |
| Ostrich Runner | PC | | Microforum | | | |
| Ostrov e'rotiki Остров эротики | PC | | Original | | | |
| Ostrov Nanda Остров Нанда | PC | 1.000 | Original | | | |
| Othelanian Wars オセラニアン・ウォーズ | PC | | Original | | | |
| Othello CD-ROM | PC | | Original | | | |
| Otome Koigokoro Prister 乙女恋心プリスター体験版 | PC | | Taikenban | | | |
| Otorva v shkole Оторва в школе | PC | | Original | | | |
| Otto Bock: Orthopädische Industrie: Neuheiten Vol. 2: Stand Januar 1997 | CDI | | Original | | | |
| Ougon Musou Kyoku Cross 黄金夢想曲 CROSS | PC | 2.00 | Original | | | |
| Our Worst Fears: Die Blumen des Todes | PC | | Original | | | |
| Ousama Monogatari 王様物語 | WII | | Beta | | | |
| Out of This World | 3DO | | Original | | | |
| Out of This World | 3DO | RE | 3DO Maniac Pack | | | |
| Outbreaker | PC | | Original | | | |
| The Outforce | PC | 1.0.0.0 | Original | | | |
| Outlaw Racers | PC | | Sold Out Software | | | |
| Outrage | PC | | Original | | | |
| OutRun 2 | XBOX | | Beta | | | |
| OutRun 2006: Coast 2 Coast (Disc 1) | PC | | Original | | | |
| OutRun 2006: Coast 2 Coast (Disc 2) | PC | | Original | | | |
| Over 1000 Games: The Complete Encyclopedia of Games (Disc 1) | PC | | Original | | | |
| Over 1000 Games: The Complete Encyclopedia of Games (Disc 2) | PC | | Original | | | |
| Over 1000 Games: The Complete Encyclopedia of Games: Volume II (Disc 1) Over 1000 Games Volume 2 | PC | | Original | | | |
| Over 1000 Games: The Complete Encyclopedia of Games: Volume II (Disc 2) Over 1000 Games Volume 2 | PC | | Original | | | |
| Over 200 Programs for Windows STG Computers LTD Windows Extra CD-ROM | PC | | Original | | | |
| Over 350 Solitaire Games | PC | | Original | | | |
| Over Load | PC | | | | | |
| Overboard! | PC | | Original | | | |
| Overclocked: Una Storia di Violenza | PC | 1.1 | Original | | | |
| Overlord BGamer 153 (Side A) | PC | | Covermount | | | |
| Overlord | PC | 1.2 | Original | | | |
| Overlord II | PC | | Original | | | |
| Overlord II | PC | | Preview Code | | | |
| Overlord: Raising Hell | PC | 1.3 | Original | | | |
| Overwatch | PC | | Origins Edition | | | |
| Oxford Handbook of Clinical Medicine for PDAs: Seventh Edition | PALM | 10.0.05/2007.9.7 | | | | |
| Oynayarak Ogreniyorum 1 Oynayarak Öğreniyorum 1 | PC | | Original | | | |
| Oyungezer: Mart 2010 | PC | | | | | |
| Oyunlarla Dil Bilgisi Oyunlarla Matematik | PC | | Original | | | |
| Oz: The Magical Adventure | PC | | Original | | | |
| Ozzie's World | PC | | Original | | | |
| Overkill & Lunar-C | CD32 | | Original | | /DP130002 | |
| The Oregon Trail | PC | 1.1 | Original | | #HCD606 | |
| The Oregon Trail | PC | 1.2 | Original | | #HCD706 | |
| The Oregon Trail | PC | 1.2 | Original | | #HCD706 | |
| Oregon Trail II | PC | 1.31 | Rerelease | | #HCD744AE-CD | |
| Oregon Trail II | PC | 1.32 | Rerelease | | #HCD744CE-CD | |
| Oregon Trail II: 25th Anniversary Limited Edition | PC | 1.3 | Original, SoftKey | | #OTR744AE-CD | |
| Oesterreichische Nationalbibliothek: Multimediale Enzyklopaedie auf 3 CD-i's (Disc 1) (Prunksaal/Impressionen) | 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 3) (Apokalypse) | CDI | | Original | | 0103313 | |
| Over 350 Jigsaw Puzzles | PC | | Original | | 012163 | |
| Olivers Äventyr: Drakens Förbannelse | PC | | Original | | 021120110 | |
| Outwars (Disc 2) | PC | 1.0 | Original | | 0298 Part No. X03-57509 | |
| Outwars (Disc 2) | PC | 1.0 | Original | | 0298 Part No. X03-57509 | |
| Outwars (Disc 1) | PC | 1.0 | Original | | 0298 Part No. X03-63527 | |
| Outwars (Disc 1) | PC | 1.0 | Original | | 0298 Part No. X03-63527 | |
| Outwars (Disc 1) | PC | 1.0 | Original | | 0398 Artikelnr. X00-14039 DE | |
| Outwars (Disc 2) | PC | 1.0 | Original | | 0398 Artikelnr. X00-14040 DE | |
| Oddworld: Abe's Oddysee | PC | 2.0 | Original | | 04-12608CD | |
| Oddworld: Abe's Oddysee | PC | 2.0 | Channelware | | 04-15303 | |
| Oddworld: Abe's Exoddus (Install) | PC | 2.0 | Original | | 04-15993CD1 | |
| Oddworld: Abe's Exoddus (Play) | PC | | Original | | 04-15993CD2 | |
| Overwatch | PC | | Origins Edition | | 052429 | |
| Oregon Trail II | PC | 1.3 | Smart Saver | | 0TT744AE-CD | |
| Ona: Sbornik e'roticheskix igr Она: Сборник эротических игр | PC | | Original | | 10-20999 | |
| Outward | PC | | Day One Edition | | 1024669LAINT, 103699 | |
| Opera Fatal | PC | | Tandem | | 1444 | |
| OutRun 2006: Coast 2 Coast | PC | | GSP White Label: Reload | | 1673A | |
| OutRun 2006: Coast 2 Coast | PC | | White Label | | 1673A | |
| Oceans Below The Software Toolworks Presents ... Oceans Below | MAC | | Original | | 2198620-590001 / I 073100, CDRM1103420 | |
| O.R.B: Off-World Resource Base | PC | 1.0 | Original | | 22434CD | |
| Our House featuring The Family Circus | VIS | | Original | | 25-6146 | |
| The Oregon Trail 5th Edition: Adventures Along the Oregon Trail | PC | 1.0 | Original | | 380859-CD | |
| The Oregon Trail 5th Edition: Adventures Along the Oregon Trail | PC | 1.0 | Scholastic | | 380859-CD WP2 | |
| The Oregon Trail 5th Edition: Adventures Along the Oregon Trail | PC | 1.0 | Original | | 380859A-CD | |
| The Oregon Trail 5th Edition: Adventures Along the Oregon Trail | PC | 1.1 | Rerelease, Southwestern School Set | | 380859B-CD | |
| Oregon Trail II | PC | 1.3 | Smart Saver | | 381032-CD/i401ha | |
| Open Universiteit: Practicum Toxicologische Histopathologie Open University: Practical Toxicological Histopathology | CDI | | Original | | 4589 | |
| The Oregon Trail 5th Edition: Adventures Along the Oregon Trail | PC | 1.01E | Enhanced Education Version | | 480599-CD | |
| Outtrigger | DC | 1.003 | Original | | 51102 | |
| 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 Series 02: Oha Ska! おはスタシリーズ02 おは スカ | KSITE | | Original | | 538714 | |
| Operation Omega | PC | | Original | | 7-20286-92175-1 | |
| ObsCure | PC | 1.0 | Original | | 719 02 102 | |
| ObsCure | PC | | Original | | 71902134 | |
| Overwatch | PC | | Game of the Year Edition, Legendary Edition | | 73052010US, S7302210 | |
| Origami | CDI | | Original | | 810 0041 | |
| L'Open de Palm Springs | CDI | | Original, For Demonstration Only | | 812 0002 | |
| Les Ours Berenstain: Comme des Grands | CDI | 1.05 | | | 812 0063 | |
| Oldtimer | PHOTO-CD | | Original | | 813 0067 | |
| Ontdek het Onbekende Nederland | CDI | 1.06 | Original | | 814 0104 | |
| Ouro e Glória: O Caminho para El Dorado | PC | | Original | | 906.02.0 | |
| Oz: The Magical Adventure | PC | 7.0.0.198 | Rerelease | | 92785 | |
| The Orange Box (Disc 1) | PC | | Original, EA Classics | | 985207, VAE07705811D, VAE07705811D/ENG, VAE07707118D/ENG, VAX07705811D/AUS | |
| The Orange Box (Disc 2) | PC | | Original | | 985217 | |
| Oddworld: Abe's Exoddus (Installazione) | PC | 1.0 | Replay | | ABEXPCREI/A1 | |
| Oddworld: Abe's Exoddus (Gioco) | PC | 1.0 | Replay | | ABEXPCREI/A2 | |
| OverTop オーバートップ | NGCD | | Original | | ADCD-011 | |
| Oshidashi Zintrick ~ ZinTricK 押し出しジントリック | NGCD | | Original | | ADCD-104 | |
| Ore no Shita de Agake 俺の下であがけ | PC | System3.9 Ver.5.43 | Original | | ALB-005 | |
| Operation | PC | | General Mills | | AM0703R71 | |
| Operation | PC | | General Mills | | AM801R5 | |
| Ozzie's World オジィーズワールド | PC | | Original | | ASOW-71110 | |
| Operation Darkness | XBOX360 | | Original | | AT-2002 | |
| Official PlayStation Magazine Issue 09: September 2007 | PS3 | 01.00 | | | BCED - 000 … | |
| Official PlayStation Magazine Issue 10: October 2007 | PS3 | 01.00 | | | BCED-00086 | |
| Official PlayStation Magazine Issue 11: November 2007 | PS3 | 01.02 | | | BCED-00087 | |
| Official PlayStation Magazine Issue 12: December 2007 | PS3 | 01.00 | | | BCED-00088 | |
| Official PlayStation Magazine Issue 13: Christmas 2007 | PS3 | 01.00 | | | BCED-00181 | |
| Official PlayStation Magazine Issue 14: January 2008 | PS3 | 01.00 | | | BCED-00202 | |
| Official PlayStation Magazine Issue 15: February 2008 | PS3 | 01.01 | | | BCED-00203 | |
| Official PlayStation Magazine Issue 16: March 2008 | PS3 | 01.01 | | | BCED-00204 | |
| Official PlayStation Magazine Issue 17: April 2008 | PS3 | 01.00 | | | BCED-00205 | |
| Official PlayStation Magazine Issue 22: September 2008 | PS3 | 01.01 | | | BCED-00210 | |
| Official PlayStation Magazine Issue 23: October 2008 | PS3 | 01.00 | | | BCED-00211 | |
| Official PlayStation Magazine Issue 24: November 2008 | PS3 | 01.01 | | | BCED-00212 | |
| Official PlayStation Magazine Issue 25: December 2008 | PS3 | 01.00 | | | BCED-00213 | |
| Official PlayStation Magazine Issue 26: Christmas 2008 | PS3 | 01.00 | | | BCED-00214 | |
| Official PlayStation Magazine Issue 27: January 2009 | PS3 | 01.00 | | | BCED-00426 | |
| Official PlayStation Magazine Issue 28: February 2009 | PS3 | 01.00 | | | BCED-00427 | |
| Official PlayStation Magazine Issue 29: March 2009 | PS3 | 01.01 | | | BCED-00428 | |
| Official PlayStation Magazine Issue 30: April 2009 | PS3 | 01.00 | | | BCED-00429 | |
| Official PlayStation Magazine Issue 35: September 2009 | PS3 | 01.00 | | | BCED-00434 | |
| Official PlayStation Magazine Issue 36: October 2009 | PS3 | 01.01 | | | BCED-00435 | |
| Official PlayStation Magazine Issue 37: November 2009 | PS3 | 01.00 | | | BCED-00436 | |
| Official PlayStation Magazine Issue 38: December 2009 | PS3 | 01.00 | | | BCED-00437 | |
| Official PlayStation Magazine Issue 39: Christmas 2009 | PS3 | 01.01 | | | BCED-00438 | |
| Official PlayStation Magazine Issue 40: January 2010 | PS3 | 01.00 | | | BCED-00439 | |
| Official PlayStation Magazine Issue 41: February 2010 | PS3 | 01.02 | | | BCED-00803 | |
| Official PlayStation Magazine Issue 42: March 2010 | PS3 | 01.01 | | | BCED-00804 | |
| Official PlayStation Magazine Issue 43: April 2010 | PS3 | 01.00 | | | BCED-00805 | |
| Official PlayStation Magazine Issue 48: September 2010 | PS3 | 01.00 | | | BCED-00810 | |
| Official PlayStation Magazine Issue 49: October 2010 | PS3 | 01.00 | | | BCED-00811 | |
| Official PlayStation Magazine Issue 50: November 2010 | PS3 | 01.01 | | | BCED-00812 | |
| Official PlayStation Magazine Issue 51: December 2010 | PS3 | 01.00 | | | BCED-00813 | |
| Official PlayStation Magazine Issue 52: Christmas 2010 | PS3 | 01.01 | | | BCED-00814 | |
| Official PlayStation Magazine Issue 53: January 2011 | PS3 | 01.01 | | | BCED-00815 | |
| Official PlayStation Magazine Issue 54: February 2011 | PS3 | 01.00 | | | BCED-01196 | |
| Official PlayStation Magazine Issue 55: March 2011 | PS3 | 01.00 | | | BCED-01197 | |
| Official PlayStation Magazine Issue 56: April 2011 | PS3 | 02.00 | | | BCED-01198 | |
| Official PlayStation Magazine Issue 61: September 2011 | PS3 | 01.00 | | | BCED-01203 | |
| Official PlayStation Magazine Issue 62: October 2011 | PS3 | 01.00 | | | BCED-01204 | |
| Official PlayStation Magazine Issue 63: November 2011 | PS3 | 01.00 | | | BCED-01205 | |
| Official PlayStation Magazine Issue 64: December 2011 | PS3 | 01.01 | | | BCED-01206 | |
| Official PlayStation Magazine Issue 65: Christmas 2011 | PS3 | 01.00 | | | BCED-01207 | |
| Official PlayStation Magazine Issue 66: January 2012 | PS3 | 01.02 | | | BCED-01208 | |
| Official PlayStation Magazine Issue 67: February 2012 | PS3 | 02.01 | | | BCED-01209 | |
| Official PlayStation Magazine Issue 69: April 2012 | PS3 | 01.00 | | | BCED-01564 | |
| Official PlayStation Magazine Issue 74: September 2012 | PS3 | 01.00 | | | BCED-01569 | |
| Official PlayStation Magazine Issue 75: October 2012 | PS3 | 01.00 | | | BCED-01570 | |
| Official PlayStation Magazine Issue 76: November 2012 | PS3 | 01.00 | | | BCED-01571 | |
| Official PlayStation Magazine Issue 77: December 2012 | PS3 | 01.00 | | | BCED-01572 | |
| Official PlayStation Magazine Issue 78: Christmas 2012 | PS3 | 01.00 | | | BCED-01573 | |
| Official PlayStation Magazine Issue 79: January 2013 | PS3 | 01.03 | | | BCED-01574 | |
| Official PlayStation Magazine Issue 80: February 2013 | PS3 | 01.00 | | | BCED-01575 | |
| Official PlayStation Magazine Issue 81: March 2013 | PS3 | 01.00 | | | BCED-01576 | |
| Official PlayStation Magazine Issue 68: March 2012 | PS3 | 01.02 | | | BCED-01577 | |
| Official PlayStation Magazine Issue 82: April 2013 | PS3 | 01.00 | | | BCED-01817 | |
| One Piece: Unlimited World R | PS3 | 01.01 | Original | | BLAS 50699 | |
| The Orange Box | PS3 | 01.00 | Original | | BLES-00153 | |
| The Orange Box | PS3 | 01.00 | Original | | BLES-00171 | |
| The Orange Box | PS3 | 01.00 | Original | | BLES-00172 | |
| Overlord: Raising Hell | PS3 | 01.00 | Original | | BLES-00257 | |
| Overlord II | PS3 | 01.02 | Original | | BLES-00580 | |
| Operation Flashpoint: Dragon Rising | PS3 | 01.01 | Original, Promo | | BLES-00597 | |
| Operation Flashpoint: Red River | PS3 | 01.01 | Original | | BLES-01171 | |
| Order Up!! | PS3 | 01.04 | Original | | BLES-01470 | |
| Of Orcs and Men | PS3 | 01.01 | Original | | BLES-01586 | |
| One Piece: Pirate Warriors | PS3 | 01.01 | Original | | BLES-01672 … | |
| One Piece: Pirate Warriors | PS3 | 02.00 | Original, Essentials | | BLES-01672 … | |
| One Piece: Pirate Warriors 2 | PS3 | 01.00 | Original | | BLES-01913 | |
| One Piece: Unlimited World Red | PS3 | 01.00 | Original | | BLES-02020 | |
| One Piece: Pirate Warriors + One Piece: Pirate Warriors 2 | PS3 | 01.00 | Original | | BLES-02131 | |
| One Piece: Pirate Warriors 3 | PS3 | 01.00 | Original | | BLES-02140 | |
| Odin Sphere: Leifthrasir | PS3 | 01.00 | Original | | BLES-02241 | |
| Operation Flashpoint: Dragon Rising | PS3 | 01.01 | Original | | BLJM 60152 | |
| Operation Flashpoint: Red River | PS3 | 01.02 | Original, Codemasters the Best | | BLJM 60361 … | |
| Oretachi ni Tsubasa wa Nai 俺たちに翼はない | PS3 | 01.01 | Original | | BLJM 61018 | |
| Odin Sphere: Leifthrasir オーディンスフィア レイヴスラシル | PS3 | 01.00 | Original | | BLJM 61239 | |
| Oneechanbara Z: Kagura with NoNoNo! お姉チャンバラZ~カグラ~ With NoNoNo! | PS3 | 01.03 | Original | | BLJS 10221 | |
| Ore no Imouto ga Konnani Kawaii Wake ga Nai. Happy End 俺の妹がこんなに可愛いわけがない。 ハッピーエンド | PS3 | 01.01 | Original | | BLJS 10238 | |
| One Piece: Unlimited World R ワンピース アンリミテッドワールド R | PS3 | 01.01 | Original | | BLJS 10272 | |
| Operation Flashpoint: Dragon Rising 오퍼레이션 플래시포인트: 드래곤 라이징 | PS3 | 01.01 | Original | | BLKS 20157 | |
| The Orange Box | PS3 | 01.00 | Original | | BLUS-30055 | |
| Overlord: Raising Hell | PS3 | 01.00 | Original | | BLUS-30143 | |
| Operation Flashpoint: Dragon Rising | PS3 | 01.01 | Original | | BLUS-30316 | |
| Overlord II | PS3 | 01.01 | Original | | BLUS-30317 | |
| Operation Flashpoint: Red River | PS3 | 01.01 | Original | | BLUS-30704 | |
| Order Up!! | PS3 | 01.02 | Original | | BLUS-30904 | |
| One Piece: Unlimited World Red | PS3 | 01.00 | Day One Edition | | BLUS-31427 … | |
| Odin Sphere: Leifthrasir | PS3 | 01.01 | Original | | BLUS-31601 | |
| Oddworld: Stranger's Wrath HD | PS3 | 01.00 | Original | | BLUS-31620 | |
| Oddworld: Abe's Oddysee: New 'n' Tasty! | PS3 | 01.00 | Limited Edition | | BLUS-31621 | |
| On Air | PC | | Original | | BROWNIE 990201 | |
| Ozaki Yutaka Eyes "Hakushi no Sanran" Yori 尾崎豊 eyes「白紙の散乱」より | PHOTO-CD | | | | CAT.908753-7 | |
| Of Light and Darkness: The Prophecy (Disc 1) | PC | | Original | | CD-C95-166-0 | |
| Of Light and Darkness: The Prophecy (Disc 2) | PC | | Original | | CD-C95-166-1 | |
| Of Light and Darkness: The Prophecy (Disc 3) | PC | | Original | | CD-C95-166-2 | |
| Off-Road Redneck Racing | PC | | Original | | CD-C98-1259-0 | |
| Out of This World | PC | | Valueware | | CD-ICD-142-0 | |
| Omar Sharif on Bridge | PC | | Valueware | | CD-ICD-148-0 | |
| Out of This World | PC | | Rerelease | | CD-MMC-023-0 | |
| The Operative: No One Lives Forever (Disc 1) | PC | | Bundle Version Micro-Star International OEM | | CD-W581995-MSYZ1, FXX08903223D1 | |
| The Operative: No One Lives Forever (Disc 2) (In the Lounge with No One Lives Forever) | PC | | Bundle Version Micro-Star International OEM | | CD-W581995-MSYZ2 | |
| Of Light and Darkness: The Prophecy (Disc 1) | 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 3) | PC | | Original | | CD-W95-166-E | |
| Original War (Disc 1) | PC | 1.02 | Original | | CD-W95-V006-IT1 | |
| Original War (Disc 2) | PC | 1.02 | Original | | CD-W95-V006-IT2 | |
| One Must Fall 2097 | PC | 2.1 | The Smile Edition | | CDR3016 | |
| The Oregon Trail | PC | 3.0.1 | Slash | | CDRM1239790 | |
| Operation Flashpoint: Elite | XBOX | | Original | | CM-090 | |
| Overlord | XBOX360 | | Original | | CM-2005 | |
| Overlord | XBOX360 | | Beta | | CM-2005 | |
| Overlord | XBOX360 | | Beta | | CM-2005 | |
| Overlord II | XBOX360 | | Original | | CM-2057 | |
| Overlord II | XBOX360 | | Beta | | CM-2058 | |
| Operation Flashpoint: Dragon Rising | XBOX360 | | Original | | CM-2065 | |
| Operation Flashpoint: Dragon Rising | XBOX360 | | Original | | CM-2065 | |
| Operation Flashpoint: Red River | XBOX360 | | Original | | CM-2104 | |
| Operation Flashpoint: Red River | XBOX360 | | Original | | CM-2104 | |
| Oddballz: Your Wacky Computer Petz | PC | 1.0 | Original | | CS090370 | |
| Overboard! | PC | | Dice | | DCG 005752, DMM 005776 | |
| Overboard! | PC | | Dice | | DCG 005752, DMM 005776 | |
| One Piece: Pirates Carnival ワンピース パイレーツカーニバル | GC | | Original | | DL-DOL-GIPJ-JPN | |
| Ohenro-San: Hosshin no Dojo (Awa Kuni) Hen お遍路さん 発心の道場 (阿波国) 編 | GC | | Original | | DL-DOL-GODJ-JPN | |
| Outlaw Golf | GC | | Original | | DL-DOL-GOFP-EUR-01 | |
| One Piece: Grand Battle! 3 ONE PIECE ~グランド・バトル!3~ | GC | | Original | | DL-DOL-GOGJ-JPN | |
| Odama | GC | | Original | | DL-DOL-GOOP-EUR | |
| One Piece: Grand Battle! Rush ワンピース グラバト! ラッシュ | GC | | Original | | DL-DOL-GOPJ-JPN | |
| Open Season | GC | | Original | | DL-DOL-GOSP-EUR | |
| Oneechanbara VorteX: Imichi o Tsugu Mono-tachi お姉チャンバラ vorteX ~忌血を継ぐ者たち~ | XBOX360 | | Original | | DP-2002 | |
| Onechanbara: Bikini Samurai Squad | XBOX360 | | Original | | DP-2026 | |
| Oneechanbara Z: Kagura お姉チャンバラZ~カグラ~ | XBOX360 | | Original | | DP-2036 | |
| Oddworld: La Fureur de l'Etranger Oddworld: Stranger's Wrath | XBOX | | Original | | EA-109 | |
| Oddworld: Stranger's Wrath | XBOX | | Original | | EA-109 | |
| Oddworld: Stranger's Wrath | XBOX | | Original | | EA-109 | |
| Oddworld: Strangers Vergeltung | XBOX | | Original | | EA-109 | |
| The Orange Box | XBOX360 | | Original | | EA-2063 | |
| The Orange Box | XBOX360 | | Original | | EA-2063 | |
| The Orange Box 오렌지 박스 | XBOX360 | | Original | | EA-2063 | |
| The Oxfordshire Golf Club | PC | | Original | | EAE05101006D | |
| Offroad Off-Road Redneck Racing | PC | | Original | | ECD 000592K | |
| Ogallala: Das Kartenspiel für PC | PC | | Original | | ECD000799D 00031111-001 | |
| The Operational Art of War II | PC | 1.01.02 | Xplosiv | | EI-1259-3 | |
| The Operative: No One Lives Forever (Disc 1) | PC | 1.004 | Game of the Year Edition (Xplosiv) | | EI-1685-1 | |
| The Operative: No One Lives Forever (Disc 2) | PC | 1.004 | Game of the Year Edition (Xplosiv) | | EI-1685-2 | |
| Oil Tycoon 2 Oil Tycoon 2: Il Ritorno di una Leggenda | PC | | EXA Games | | EXAG020 | |
| Operation Flashpoint: Red River | PC | | Kakaku Kaiteihan | | FBG028W000A10 | |
| Orgazumi (Disc 1) オーガズミー | PC | | Original | | FCG013 | |
| Orgazumi (Disc 2) オーガズミー | PC | | Original | | FCG014 | |
| Of Orcs and Men | XBOX360 | | Original | | FE-2009 | |
| Otogi 2: Immortal Warriors | XBOX | | Original | | FS-004 | |
| Otogi 2: Immortal Warriors | XBOX | | Original | | FS-004 | |
| The Operative: No One Lives Forever (Disc 1) | PC | 1.0 | Original | | FXX08903223D1 | |
| The Operative: No One Lives Forever (Disc 2) | PC | 1.0 | Original | | FXX08903223D2 | |
| The Operative: No One Lives Forever (Disc 2) | PC | 1.0 | Original | | FXX08903223D2 | |
| Off-World Interceptor オフ‐ワールド・インターセプター | 3DO | | Original | | FZ-SJ3151 | |
| Outer World アウター・ワールド | 3DO | | Original | | FZ-SJ3451 | |
| Oukoku no Grand Chef 王国のグランシェフ | 3DO | | Original | | FZ-SJ4252 | |
| 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 | |
| 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 | |
| Olympic Soccer | 3DO | | Original | | FZ-SW0011 | |
| Olympic Summer Games | 3DO | | Original | | FZ-SW0012 | |
| Omerta: City of Gangsters | PC | | Covermount | | G1DVD0215 | |
| Off-World Interceptor 혹성질주 | 3DO | | Original | | GDT-GA241 | |
| OutRun 2 | CHIHIRO | 2.000 | Original | | GDX-0004A | |
| Omakase! Savers おまかせ!退魔業 | SS | 1.002 | Original | | GS-9030 | |
| Orgaslave (Side-1) オルガスレイブ | PC | | Original | | H PT 003-1 | |
| Orgaslave (Side-2) オルガスレイブ | PC | | Original | | H PT 003-2 | |
| Ookami-teki Monshou: Crest of Wolf 狼的紋章 クレスト・オブ・ウルフ | PCE | | Original | | HCD3044 | |
| Oregon Trail II | PC | 1.31 | Rerelease | | HCD744BE-CD | |
| 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 | |