| Region | Title | System | Version | Edition | Languages | Serial | Status |
|---|
 | Oto to E no Deru Eigo Jisho No. 1: Start with Words
音と絵の出る英語辞書 Ｎｏ．１ 「Ｓｔａｒｔ ｗｉｔｈ Ｗｏｒｄｓ」 | FMT | | Original, Rerelease |  | HMA-217 |  |
 | Outlast: A Reading for Information Game | PC | | Original |  | HH824 | |
| 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 | |
| Ookami-teki Monshou: Crest of Wolf
狼的紋章 クレスト・オブ・ウルフ | PCE | | Original | | HCD3044 | ![2 and more dumps from original media [!]](/images/status/green.png "2 and more dumps from original media [!]") |
| Omakase! Savers
おまかせ！退魔業 | SS | 1.002 | Original | | GS-9030 | |
| Otomedius (Application Disc 2)
オトメディウス | KEA | JAA | Original | | GGGJAA03 | |
| Otomedius (Application Disc 1)
オトメディウス | KEA | JAA | Original | | GGGJAA02 | |
| Otomedius (System Disc)
オトメディウス | KEA | JAA | Original | | GGGJAA01 | |
 | Omerta: City of Gangsters | PC | | Covermount | | G1DVD0215 | |
| Olympic Summer Games | 3DO | | Original | | FZ-SW0012 | |
| Olympic Soccer | 3DO | | Original |     | FZ-SW0011 | |
| Ojousama Sousamou
お嬢様捜査網 | PC-FX | | Original | | FXNHE616 | |
| Otogi: Hyakki Toubatsu Emaki
Ｏ・ＴＯ・ＧＩ ～百鬼討伐絵巻～ | XBOX | | Special Pack | | FS-004 | |
| Otogi 2: Immortal Warriors | XBOX | | Original | | FS-004 | |
 | Otogi 2: Immortal Warriors | XBOX | | Original | | FS-004 | |
| Otogi: Myth of Demons | XBOX | | Original | | FS-002 | |
| Otogi: Myth of Demons | XBOX | | Special Pack | | FS-002 | |
| Otogi: Myth of Demons | XBOX | | Original | | FS-002 | |
| Of Orcs and Men | XBOX360 | | Original | | FE-2009 | |
| Orgazumi (Disc 2)
オーガズミー | PC | | Original | | FCG014 | |
| Orgazumi (Disc 1)
オーガズミー | PC | | Original | | FCG013 | |
| One Must Fall 2097 | PC | | Original | | EPOMF01 | |
| One Must Fall 2097 | PC | | Original | | EPOMF01 | |
 | Onechanbara: Bikini Samurai Squad | XBOX360 | | Original | | DP-2026 | |
| 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 | |
| Odama | GC | | Original | | DL-DOL-GOOP-EUR | |
| Odama
大玉 | GC | Rev 1 | Bundled with Microphone | | DL-DOL-GOOJ-JPN | |
| Odama | GC | Rev 1 | Original | | DL-DOL-GOOE-USA | |
| One Step Ahead | CDI | | | | Demo 10.05.94 | |
| Overboard! | PC | | Dice | | DCG 005752, DMM 005776 | |
| Overboard! | PC | | Dice | | DCG 005752, DMM 005776 | |
 | One Must Fall 2097
One Must Fall | PC | | Rerelease | | D.L.: M-8684-97 | |
| Oddballz: Your Wacky Computer Petz | PC | 1.0 | Original | | CS090370 | |
| Operation Flashpoint: Red River | XBOX360 | | Original | | CM-2104 | |
| Operation Flashpoint: Red River | XBOX360 | | Original | | CM-2104 | |
| Operation Flashpoint: Dragon Rising | XBOX360 | | Original | | CM-2065 | |
| Operation Flashpoint: Dragon Rising | XBOX360 | | Original | | CM-2065 | |
 | Overlord II | XBOX360 | | Beta | | CM-2058 | |
| Overlord II | XBOX360 | | Original | | CM-2057 | |
| Overlord | XBOX360 | | Beta | | CM-2005 | |
| Overlord | XBOX360 | | Beta | | CM-2005 | |
| Overlord | XBOX360 | | Original | | CM-2005 | |
| Operation Flashpoint: Elite | XBOX | | Original | | CM-090 | |
| The Oregon Trail | PC | 3.0.1 | Slash | | CDRM1239790 | |
| One Must Fall 2097 | PC | 2.1 | The Smile Edition | | CDR3016 | |
| 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 | |
| The Operative: No One Lives Forever (Disc 1) | PC | | Bundle Version Micro-Star International OEM | | CD-W581995-MSYZ1, FXX08903223D1 | |
| Odium
ōdi·um | PC | | Original | | CD-W58-1104-0 | |
| Out of This World | PC | | Rerelease | | CD-MMC-023-0 | |
| Omar Sharif on Bridge | PC | | Valueware | | CD-ICD-148-0 | |
| One Piece: Unlimited World Red | PS3 | 01.00 | Day One Edition | | BLUS-31427 … | |
| 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 | |
| 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: Kaizoku Musou 3
ワンピース 海賊無双3 | PS3 | 01.01 | Original | | BLJM 61261 | |
| 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 | |
| Oretachi ni Tsubasa wa Nai
俺たちに翼はない | PS3 | 01.01 | Original | | BLJM 61018 | |
| One Piece: Kaizoku Musou 2
ワン・ピース ～海賊無双２～ | PS3 | 01.02 | Treasure Box | | BLJM 60572 | |
| Operation Flashpoint: Red River | PS3 | 01.02 | Original, Codemasters the Best | | BLJM 60361 … | |
| Operation Flashpoint: Dragon Rising | PS3 | 01.01 | Original | | BLJM 60152 | |
 | Ookami: Zekkeiban
大神 絶景版 | PS3 | 00.00 | Original, PlayStation 3 the Best, PlayStation 3 the Best (Reprint) | | BLJM 55061 … | |
| One Piece: Unlimited World Red | PS3 | 01.00 | Original | | BLES-02020 | |
| Of Orcs and Men | PS3 | 01.01 | Original | | BLES-01586 | |
 | One Piece: Unlimited World R | PS3 | 01.01 | Original |  | BLAS 50699 | |
| One Piece: Kaizoku Musou 2
One Piece 海賊無雙 2 | PS3 | 01.00 | Original | | BLAS 50597 | |
 | One Piece: Kaizoku Musou
ワンピース 海賊無双 | PS3 | 01.02 | Original, Treasure Box | | BLAS 50450 … | |
| Official PlayStation Magazine Issue 84: June 2013 | PS3 | 01.00 | | | BCED-01819 | |
| Official PlayStation Magazine Issue 83: May 2013 | PS3 | 01.00 | | | BCED-01818 | |
| Official PlayStation Magazine Issue 82: April 2013 | PS3 | 01.00 | | | BCED-01817 | |
| Official PlayStation Magazine Issue 68: March 2012 | PS3 | 01.02 | | | BCED-01577 | |
| Official PlayStation Magazine Issue 81: March 2013 | PS3 | 01.00 | | | BCED-01576 | |
| Official PlayStation Magazine Issue 80: February 2013 | PS3 | 01.00 | | | BCED-01575 | |
| Official PlayStation Magazine Issue 79: January 2013 | PS3 | 01.03 | | | BCED-01574 | |
| Official PlayStation Magazine Issue 78: Christmas 2012 | PS3 | 01.00 | | | BCED-01573 | |
| Official PlayStation Magazine Issue 77: December 2012 | PS3 | 01.00 | | | BCED-01572 | |
| Official PlayStation Magazine Issue 76: November 2012 | PS3 | 01.00 | | | BCED-01571 | |
| Official PlayStation Magazine Issue 75: October 2012 | PS3 | 01.00 | | | BCED-01570 | |
| Official PlayStation Magazine Issue 74: September 2012 | PS3 | 01.00 | | | BCED-01569 | |
| Official PlayStation Magazine Issue 73: August 2012 | PS3 | 01.01 | | | BCED-01568 | |
| Official PlayStation Magazine Issue 72: July 2012 | PS3 | 01.01 | | | BCED-01567 | |
| Official PlayStation Magazine Issue 71: June 2012 | PS3 | 01.00 | | | BCED-01566 | |
| Official PlayStation Magazine Issue 70: May 2012 | PS3 | 01.01 | | | BCED-01565 | |
| Official PlayStation Magazine Issue 69: April 2012 | PS3 | 01.00 | | | BCED-01564 | |
| Official PlayStation Magazine Issue 67: February 2012 | PS3 | 02.01 | | | BCED-01209 | |
| Official PlayStation Magazine Issue 66: January 2012 | PS3 | 01.02 | | | BCED-01208 | |
| Official PlayStation Magazine Issue 65: Christmas 2011 | PS3 | 01.00 | | | BCED-01207 | |
| Official PlayStation Magazine Issue 64: December 2011 | PS3 | 01.01 | | | BCED-01206 | |
| Official PlayStation Magazine Issue 63: November 2011 | PS3 | 01.00 | | | BCED-01205 | |
| Official PlayStation Magazine Issue 62: October 2011 | PS3 | 01.00 | | | BCED-01204 | |
| Official PlayStation Magazine Issue 61: September 2011 | PS3 | 01.00 | | | BCED-01203 | |
| Official PlayStation Magazine Issue 60: August 2011 | PS3 | 01.00 | | | BCED-01202 | |
| Official PlayStation Magazine Issue 58: June 2011
Official PlayStation Magazine Issue 59: July 2011 | PS3 | 02.00 | | | BCED-01200 … | |
| Official PlayStation Magazine Issue 57: May 2011 | PS3 | 01.00 | | | BCED-01199 | |
| Official PlayStation Magazine Issue 56: April 2011 | PS3 | 02.00 | | | BCED-01198 | |
| Official PlayStation Magazine Issue 55: March 2011 | PS3 | 01.00 | | | BCED-01197 | |
| Official PlayStation Magazine Issue 54: February 2011 | PS3 | 01.00 | | | BCED-01196 | |
| Official PlayStation Magazine Issue 53: January 2011 | PS3 | 01.01 | | | BCED-00815 | |
| Official PlayStation Magazine Issue 52: Christmas 2010 | PS3 | 01.01 | | | BCED-00814 | |
| Official PlayStation Magazine Issue 51: December 2010 | PS3 | 01.00 | | | BCED-00813 | |
| Official PlayStation Magazine Issue 50: November 2010 | PS3 | 01.01 | | | BCED-00812 | |
| Official PlayStation Magazine Issue 49: October 2010 | PS3 | 01.00 | | | BCED-00811 | |
| Official PlayStation Magazine Issue 48: September 2010 | PS3 | 01.00 | | | BCED-00810 | |
| Official PlayStation Magazine Issue 47: August 2010 | PS3 | 01.00 | | | BCED-00809 | |
| Official PlayStation Magazine Issue 46: July 2010 | PS3 | 01.01 | | | BCED-00808 | |
| Official PlayStation Magazine Issue 45: June 2010 | PS3 | 01.00 | | | BCED-00807 | |
| Official PlayStation Magazine Issue 44: May 2010 | PS3 | 01.00 | | | BCED-00806 | |
| Official PlayStation Magazine Issue 43: April 2010 | PS3 | 01.00 | | | BCED-00805 | |
| Official PlayStation Magazine Issue 42: March 2010 | PS3 | 01.01 | | | BCED-00804 | |
| Official PlayStation Magazine Issue 41: February 2010 | PS3 | 01.02 | | | BCED-00803 | |
| Official PlayStation Magazine Issue 40: January 2010 | PS3 | 01.00 | | | BCED-00439 | |
| Official PlayStation Magazine Issue 39: Christmas 2009 | PS3 | 01.01 | |  | BCED-00438 | |
| Official PlayStation Magazine Issue 38: December 2009 | PS3 | 01.00 | | | BCED-00437 | |
| Official PlayStation Magazine Issue 37: November 2009 | PS3 | 01.00 | | | BCED-00436 | |
| Official PlayStation Magazine Issue 36: October 2009 | PS3 | 01.01 | | | BCED-00435 | |
| Official PlayStation Magazine Issue 35: September 2009 | PS3 | 01.00 | | | BCED-00434 | |
| Official PlayStation Magazine Issue 34: August 2009 | PS3 | 01.00 | | | BCED-00433 | |
| Official PlayStation Magazine Issue 33: July 2009 | PS3 | 01.00 | | | BCED-00432 | |
| Official PlayStation Magazine Issue 32: June 2009 | PS3 | 01.00 | | | BCED-00431 | |
| Official PlayStation Magazine Issue 31: May 2009 | PS3 | 01.00 | | | BCED-00430 | |
| Official PlayStation Magazine Issue 30: April 2009 | PS3 | 01.00 | | | BCED-00429 | |
| Official PlayStation Magazine Issue 29: March 2009 | PS3 | 01.01 | | | BCED-00428 | |
| Official PlayStation Magazine Issue 28: February 2009 | PS3 | 01.00 | | | BCED-00427 | |
| Official PlayStation Magazine Issue 27: January 2009 | PS3 | 01.00 | | | BCED-00426 | |
| Official PlayStation Magazine Issue 26: Christmas 2008 | PS3 | 01.00 | | | BCED-00214 | |
| Official PlayStation Magazine Issue 25: December 2008 | PS3 | 01.00 | | | BCED-00213 | |
| Official PlayStation Magazine Issue 24: November 2008 | PS3 | 01.01 | | | BCED-00212 | |
| Official PlayStation Magazine Issue 23: October 2008 | PS3 | 01.00 | | | BCED-00211 | |
| Official PlayStation Magazine Issue 22: September 2008 | PS3 | 01.01 | | | BCED-00210 | |
| Official PlayStation Magazine Issue 21: August 2008 | PS3 | 01.00 | | | BCED-00209 | |
| Official PlayStation Magazine Issue 20: July 2008 | PS3 | 01.00 | | | BCED-00208 | |
| Official PlayStation Magazine Issue 19: June 2008 | PS3 | 01.00 | | | BCED-00207 | |
| Official PlayStation Magazine Issue 18: May 2008 | PS3 | 01.00 | | | BCED-00206 | |
| Official PlayStation Magazine Issue 17: April 2008 | PS3 | 01.00 | | | BCED-00205 | |
| Official PlayStation Magazine Issue 16: March 2008 | PS3 | 01.01 | | | BCED-00204 | |
| Official PlayStation Magazine Issue 15: February 2008 | PS3 | 01.01 | | | BCED-00203 | |
| Official PlayStation Magazine Issue 14: January 2008 | PS3 | 01.00 | | | BCED-00202 | |
| Official PlayStation Magazine Issue 13: Christmas 2007 | PS3 | 01.00 | | | BCED-00181 | |
| Official PlayStation Magazine Issue 12: December 2007 | PS3 | 01.00 | | | BCED-00088 | |
| Official PlayStation Magazine Issue 11: November 2007 | PS3 | 01.02 | | | BCED-00087 | |
| Official PlayStation Magazine Issue 10: October 2007 | PS3 | 01.00 | | | BCED-00086 | |
| Official PlayStation Magazine Issue 08: August 2007 | PS3 | 01.00 | | | BCED-00084 | |
| Official PlayStation Magazine Issue 09: September 2007 | PS3 | 01.00 | | | BCED - 000 … | |
| Official PlayStation Magazine Issue 07: July 2007 | PS3 | 01.00 | | | BCED - 000 … | |
| Operation | PC | | General Mills | | AM801R5 | |
| Operation | PC | | General Mills | | AM0703R71 | |
| Ougon Musou Kyoku X
黄金夢想曲X | XBOX360 | | Original | | AJ-2003 | |
| Oz: The Magical Adventure | PC | 7.0.0.198 | Rerelease | | 92785 | |
 | Ouro e Glória: O Caminho para El Dorado | PC | | Original | | 906.02.0 | |
| Oldtimer | PHOTO-CD | | Original | | 813 0067 | |
 | Les Ours Berenstain: Comme des Grands | CDI | 1.05 | | | 812 0063 | |
| L'Open de Palm Springs | CDI | | Original, For Demonstration Only | | 812 0002 | |
| Origami | CDI | | Original |  | 810 0041 | |
| Oxyd Magnum! Gold Edition | PC | | Game-Pack 3 | | 80227 | |
| Operation Omega | PC | | Original | | 7-20286-92175-1 | |
| 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 | |
| Onimusha 3 | PC | | Original | | 5004561 | |
 | Open Universiteit: Practicum Toxicologische Histopathologie
Open University: Practical Toxicological Histopathology | CDI | | Original | | 4589 | |
| Our House featuring The Family Circus | VIS | | Original | | 25-6146 | |
| Oceans Below
The Software Toolworks Presents ... Oceans Below | MAC | | Original | | 2198620-590001 / I 073100, CDRM1103420 | |
| Official Duke Nukem 3D Level Design Handbook | PC | | Original | | 1869-0 | |
| Oni / 4x4 Evo
Oni / 4x4 Evolution | PC | | Demo | | 12DC1-09GM03-11 | |
| Outlaws: Cidade Sem Lei (Disc 2) | PC | 2.0 | Original | | 0806.06.0 | |
| Outlaws: Cidade Sem Lei (Disc 1) | PC | 2.0 | Original | | 0806.05.0 | |
 | 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 | |
| Oregon Trail II: 25th Anniversary Limited Edition | PC | 1.3 | Original, SoftKey | | #OTR744AE-CD | |
| Oz: The Magical Adventure | PC | | Original | | | |
 | Oyunlarla Dil Bilgisi Oyunlarla Matematik | PC | | Original |  | | |
| Oyungezer: Mart 2010 | PC | | | | | |
| Oynayarak Ogreniyorum 1
Oynayarak Öğreniyorum 1 | PC | | Original | | | |
 | Oxford Handbook of Clinical Medicine for PDAs: Seventh Edition | PALM | 10.0.05/2007.9.7 | | | | |
 | Overlord
BGamer 153 (Side A) | PC | | Covermount | | | |
 | Over 350 Solitaire Games | PC | | Original | | | |
 | Over 200 Programs for Windows
STG Computers LTD Windows Extra CD-ROM | PC | | Original | | | |
| Over 1000 Games: The Complete Encyclopedia of Games: Volume II (Disc 2)
Over 1000 Games Volume 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 (Disc 2) | PC | | Original | | | |
| Over 1000 Games: The Complete Encyclopedia of Games (Disc 1) | PC | | Original | | | |
| Ousama Monogatari
王様物語 | WII | | Beta | | | |
| Our Worst Fears: Die Blumen des Todes | PC | | Original | | | |
| Oujisama Lv1
王子さまＬｖ１ | PC | | Original | | | |
| Ougon Musou Kyoku Cross
黄金夢想曲 ＣＲＯＳＳ | PC | 2.00 | Original | | | |
| Otome Koigokoro Prister
乙女恋心プリスター体験版 | PC | | Taikenban | | | |
| Othello CD-ROM | PC | | Original | | | |
 | Otchayannye domoxozyajki (Disc 3) (Igrovoj disk)
Отчаянные домохозяйки | PC | | Original |  | | |
| Otchayannye domoxozyajki (Disc 2) (Ustanovochnyj disk)
Отчаянные домохозяйки | PC | | Original | | | |
| Otchayannye domoxozyajki (Disc 1) (Ustanovochnyj disk)
Отчаянные домохозяйки | PC | | Original | | | |
| Ost-Indskaya kompaniya: Zolotoe izdanie
Ост-Индская компания: Золотое издание | PC | | Original | | | |
| OSHA MHE Forklifts
OSHA MHE Forklifts: PFS Interactive Training | CDI | | Original | | | |
 | Osef Minei Mischakim
אוסף מיני משחקים | PC | | Original | | | |
 | Oscar the Balloonist: Discovers the Farm
小小探險家奧斯卡 農場奇遇記 | PC | | Original | | | |
| Oscar der Ballonfahrer und die Geheimnisse des Waldes | PC | | | | | |
| Osananajimi wa Pet Yakuza!
幼なじみはペットヤクザ！体験版 | PC | | Taikenban | | | |
| Orly Pervoj mirovoj
Орлы Первой мировой | PC | 02.19.07 | Original | | | |
| Original Xbox Game Support: December 2005 (1.2)
Prise en charge des jeux Xbox d'origine: Décembre 2005 (1.2) | XBOX360 | | Original | | | |
| Original Xbox Game Support: August 2006 (1.5) | XBOX360 | | | | | |
| The Original Mulan
花木兰 | PC | | Original | | | |
| Die Original Moorhuhn Jagd | PC | | Best of Moorhuhn | | | |
| Optimum Resource Sampler | PC | | Rerelease | | | |
| Optimum Resource Sampler | PC | | Original | | | |
| OptImage Media Showcase | CDI | 1.0 | Original | | | |
| OptImage CD-I Starter System: Sampler Disc: Version 1.1 | CDI | | | | | |
| OptImage CD-I 220 Adjustment Disc | CDI | | Original | | | |
| Operation Thunderstorm | PC | 1.0 | Original | | | |
| Operation Neptune + Reader Rabbit 2 Deluxe! + Ultimate Writing & Creativity Center
The Learning Company 3-in-1 | PC | | | | | |
| Operation Mittelmeer | PC | | Original | | | |
| Operaciya Silent Storm: Chasovye (Disc 2)
Операция Silent Storm: Часовые | PC | | 1С: Igroteka | | | |
| Operaciya Silent Storm: Chasovye (Disc 1)
Операция Silent Storm: Часовые | PC | | 1С: Igroteka | | | |
| Operaciya Silent Storm (Disc 2)
Операция Silent Storm | PC | Aug 11 2003 | 1C: Igroteka | | | |
| Operaciya Silent Storm (Disc 1)
Операция Silent Storm | PC | Aug 11 2003 | 1C: Igroteka | | | |
| Oozora ni Kodawarou! Minna no Kuukou 2
大空にこだわろう！ みんなの空港２ | PC | | | | | |
| Ontdek de Interactieve Wereld van Neckermann | CDI | | Original | | | |
| Only You: Seikimatsu no Juliet-tachi
Ｏｎｌｙ Ｙｏｕ ～世紀末のジュリエットたち～ | FMT | | Shokai Gentei | | | |
 | Only Fun: Entra anche tu nel mondo dei Videogames | PC | | | | | |
| OnlineGamez | PC | | | | | |
| Online G@mer n. 5: Juin/Juillet 2001 (Disc 1) | PC | | | | | |
| 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: Put' samuraja
Onimusha: Путь самурая | 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 | | | |
| Oni no Kamen
鬼ノ仮面 | PC | 1.00 | Original | | | |
| One Must Fall: Battlegrounds | PC | 2090 | Original | | | |
| One Must Fall: Battlegrounds | PC | 2090 | Original | | | |
| One Must Fall 2097 | PC | 1.1 | Demo | | | |
| One Must Fall 2097 | PC | | Original | | | |
| One Must Fall 2097 | PC | | Demo: JukeBox Collection | | | |
| OMSI: Der Omnibussimulator | PC | 1.04 | OMSI Bundle | | | |
| OMSI Add-on: Wien: Der Hochflurbus LU 200 | PC | 1.0 | OMSI Bundle | | | |
| 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 | PC | | Promo | | | |
| Omgaan met Steriele Medische Hulpmiddelen
Omgaan met Steriele Medische Hulp-Middelen | CDI | | Original | | | |
| Omgaan met Steriele Medische Hulpmiddelen | CDI | | Demo | | | |
| 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 | | | |
| Omar Sharif Bridge | PC | 1.0 | Original | | | |
| Olympic Soccer | PC | | CD-ROM Classic Collection 2 | | | |
| Olympic Soccer | PC | | Kixx | | | |
| Olympic Games: Atlanta 1996 | PC | | Original | | | |
| Olympic Games | 3DO | | Bundled with Magazine (Demo) | | | |
| Olympiad Qiaosai 2
奧林匹亞橋賽2 | PC | | Original | | | |
 | Ollo en de Reuzentomaat | PC | | CD-ROM Topper | | | |
 | Olimpiada Zimowa 2002
Olimpijskie Zmagania 2002 | PC | | Original |  | | |
| Oldtimer: Erlebte Geschichte Teil II | PC | | Original | | | |
| Oldtimer | ACD | | Original | | | |
| Old El Paso Recipes for Family Fun | PC | | Original | | | |
| Okano Software Classics: Volume 2 | PC | | Original | | | |
| Ōkami | WII | | Beta | | | |
| OIO: The Game: Enlarged | PC | | F*ckn' Best of Independent Games: Collection Vol. 1 | | | |
| Oil Platform Simulator | PC | 1.0 | Original | | | |
| Oh!X 2001 Spring 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 1999 Summer Special CD-ROM | 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 1998 Spring Special CD-ROM (Part 1) | X68K | | | | | |
| Oh!X 1998 Spring Special CD-ROM (Part 2) (Sampler Disc) | X68K | | | | | |
| 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 Yes... More Worms! Volume 1 | ACD | | Original | | | |
| Ognisty Podmuch: Fire Captain (Disc 2) (Dysk z Grą) | PC | | Covermount | | | |
| Ognisty Podmuch: Fire Captain (Disc 1) (Dysk Instalacyjny) | PC | | Covermount | | | |
| Offroad Extreme! Special Edition | PC | | Original | | | |
| Official Sega Dreamcast Magazine: Special Edition Preview PC CD-ROM | PC | | | | | |
| Official Sega Dreamcast Magazine Vol. 5: May 2000 | DC | 1.010 | | | | |
| Official Sega Dreamcast Magazine Vol. 11: February 2001 | DC | 0.500 | | | | |
| Official Lara Croft: Real Life '99 Lara: Character Images | PC | | Press Kit | | | |
| 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 | | | |
| The Official Browser of Primagames.com | PC | | | | | |
| Offensive
Offensive War: The Ultimate Strategical Combat Game | PC | | Covermount | | | |
| Odyssey: The Legend of Nemesis | MAC | 1.0 | Original | | | |
| 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 | | | |
| ODN Palm Power Pack | PALM | | Original | | | |
| Odium
ōdi·um | PC | | Covermount | | | |
| Oddworld: Abe's Exoddus: US Manual | MAC | | Art Assets | | | |
| Ochazukenori: Kaiki!! Mushi Danshaku no Yakata
御茶漬海苔 怪奇！！蟲男爵の館 | PC | | Original | | | |
| Ocean/Infogrames Show Case December 1997 | PC | | | | | |
| ObsCure: The Aftermath | WII | | Beta | | | |
 | Oblivious Garden: Carmina Burana (Disc 2) (Music Disc) | PC | | Standard Edition | | | |
| Oblivious Garden: Carmina Burana (Disc 1) (Game Disk) | PC | 1.0 | Standard Edition | | | |
| Obitel' t'my: Sumerki
Обитель тьмы: Сумерки | PC | 1.1 | Original | | | |
| Obitel' T'my
Обитель Тьмы | PC | 5.02 04/07/03 | Original | | | |
| Obitaemyj ostrov: Zemlyanin
Обитаемый остров: Землянин | PC | | Original | | | |
| Obitaemyj ostrov: Chuzhoj sredi chuzhix
Обитаемый остров: Чужой среди чужих | PC | | Original | | | |
| Obitaemyj ostrov
Обитаемый остров | PC | | Original | | | |
| Obbligato (Taikenban CD-ROM)
オブリガート 体験版CD-ROM | PC | | Demo | | | |
| Ob"ekt 69: Mest' Krassera
Объект 69: Месть Крассера | PC | | Original | | | |
