| Region | Title | System | Version | Edition | Languages | Serial | Status |
|---|
 | Oct 15 2002 | PC | | Press Kit | | |  |
 | Oddworld: Abe's Oddysee | PC | 2.0 | Channelware | | 04-15303 | |
| Off-Road Redneck Racing | PC | | Original | | CD-C98-1259-0 | |
| The Official Browser of Primagames.com | PC | | | | | |
| Official Lara Croft: Real Life '99 Lara: Character Images | PC | | Press Kit | | | |
 | Oh!PC 1998-nen 10-gatsu-gou Tokubetsu Furoku CD-ROM
Ｏｈ！ＰＣ １９９８年 １０月号 特別付録ＣＤ－ＲＯＭ | PC | | | | OHPC-9810 | |
| Oh!PC 1998-nen 11-gatsu-gou Tokubetsu Furoku CD-ROM
Ｏｈ！ＰＣ １９９８年 １１月号 特別付録ＣＤ－ＲＯＭ | PC | | | | OHPC-9811 | |
| Oh!PC 1998-nen 8-gatsu-gou Tokubetsu Furoku CD-ROM
Ｏｈ！ＰＣ １９９８年 ８月号 特別付録ＣＤ－ＲＯＭ | PC | | | | OHPC-9808 | |
| Oh!PC 1998-nen 9-gatsu-gou Tokubetsu Furoku CD-ROM
Ｏｈ！ＰＣ １９９８年 ９月号 特別付録ＣＤーＲＯＭ | PC | | | | OHPC-9809 | |
 | Okano Software Classics: Volume 2 | PC | | Original | | | |
 | Omerta: City of Gangsters | PC | | Covermount | | G1DVD0215 | |
| OMSI Add-on: Wien: Der Hochflurbus LU 200 | PC | 1.0 | OMSI Bundle | | | |
| OMSI: Der Omnibussimulator | PC | 1.04 | OMSI Bundle | | | |
| 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 | | | |
 | Online G@mer n. 5: Juin/Juillet 2001 (Disc 1) | PC | | | | | |
| OnlineGamez | PC | | | | | |
 | Only Fun: Entra anche tu nel mondo dei Videogames | PC | | | | | |
| Opening Night | PC | 1.0 | Original | | #HCD646A | |
| Opening Night: Behind The Scenes | PC | 1.0 | Original | | #HCD646B | |
 | Operaciya "X" ili novye piklyucheniya Shuricha (Disc 1)
Операция "Х" или новые приключения Шурича | PC | | 1C: Kollekciya igrushek | | | |
| Operaciya Bagration
Операция Багратион | PC | | Original | | | |
| 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 Flashpoint: Cold War Crisis | PC | 1.46 | Sold Out Software | | | |
| Operation Flashpoint: Red River | PC | | Original | | MOFP3CDUS00 | |
| Operation Mittelmeer | PC | | Original | | | |
| Operation: Surgery Has Never Been so Silly! | PC | | Replay Kids | | OPERPCREGB/A | |
| The Orange Box (Disc 1) | PC | | Original | | VAD07705811D | |
| The Orange Box (Disc 2) | PC | | Original | | VAD07705811D2 | |
| The Orange Box (Disc 1) | PC | | Rerelease | | | |
| The Orange Box (Disc 2) | PC | | Rerelease | | | |
| Order of War: Osvobozhdenie
Order of War: Освобождение | PC | | Igromaniya: Vybor redakcii | | | |
| Order of War: Stolknovenie
Order of War: Столкновение | PC | | Igromaniya: Vybor redakcii | | | |
| Oregon Trail II | PC | 1.31 | Rerelease | | HCD744BE-CD | ![2 and more dumps from original media [!]](/images/status/green.png "2 and more dumps from original media [!]") |
| Oregon Trail II + Logic Quest | PC | 1.2/1.0 | Original | | | |
| The Oregon Trail: Classic Edition | PC | | SoftKey | | POT144EE-CD | |
| Original War (Disc 1) | PC | | Original | | | |
| Original War (Disc 2) | PC | | Original | | | |
 | Ortofrajda | PC | | | | | |
 | Osef Minei Mischakim
אוסף מיני משחקים | PC | | Original | | | |
| Osterspiele-Box
Oster Spielebox | PC | | Original | | | |
| Otto's Ottifanten | PC | | Original | | | |
| Our Worst Fears: Die Blumen des Todes | PC | | Original | | | |
| Outlaw Racers | PC | | Sold Out Software | | | |
 | 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 Load | PC | | | | | |
 | Overlord
BGamer 153 (Side A) | PC | | Covermount | | | |
| Overwatch | PC | | Origins Edition | | 052429 | |
| Overwatch | PC | | Game of the Year Edition, Legendary Edition | | 73052010US, S7302210 | |
 | Oyungezer: Mart 2010 | PC | | | | | |
 | Oblivious Garden: Carmina Burana (Disc 1) (Game Disk) | PC | 1.0 | Standard Edition |  | | |
| Oblivious Garden: Carmina Burana (Disc 2) (Music Disc) | PC | | Standard Edition | | | |
| 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 | | | |
 | Odyssey (Disc 1)
奧德賽 | PC | | Original | | | |
| Odyssey (Disc 2)
奧德賽 | PC | | Original | | | |
| Olympiad Qiaosai 2
奧林匹亞橋賽2 | PC | | Original | | | |
| Oscar the Balloonist: Discovers the Farm
小小探險家奧斯卡 農場奇遇記 | PC | | Original | | | |
| The Orange Box (Disc 1) | PC | 4295 / 4539 | Rerelease |                    | | |
| The Orange Box (Disc 2) | PC | 4295 / 4539 | Rerelease | | | |
| The Orange Box (Disc 1) | PC | | Original | | | |
| The Orange Box (Disc 2) | PC | | Original | | | |
| Oni
奥妮 | PC | 1.7 | Original | | | |
 | Overwatch | PC | | Origins Edition | | | |
| The Orange Box (Disc 1) | PC | | Original | | VAX07705811D | |
| The Orange Box (Disc 1) | PC | | Original | | VAI07705811D | |
| The Orange Box (Disc 2) | PC | | Original | | VAI07705811D2 | |
| The Orange Box (Disc 1)
戰慄時空2：二部曲重裝旗艦版 | PC | | Original | | TTE0193 | |
| The Orange Box (Disc 2)
戰慄時空2：二部曲重裝旗艦版 | PC | | Original | | TTE0193 | |
| The Orange Box (Disc 2) | PC | | Original | | 985217 | |
 | The Orange Box (Disc 1) | PC | | Original, EA Classics | | 985207, VAE07705811D, VAE07705811D/ENG, VAE07707118D/ENG, VAX07705811D/AUS | |
 | The Orange Box (Disc 2) | PC | | Original, EA Classics | | VAE07705811D2/ENG, VAE07707118D2/ENG, VAX07705811D2, VAX07705811D2/AUS | |
 | Operation Flashpoint: Gold Upgrade
Operace Flashpoint: Gold Upgrade | PC | | Original |  | | |
| Overlord II | PC | | Preview Code | | | |
 | Ollo in the Sunny Valley Fair | PC | | Original | | | |
| Open Season
Boog & Elliot | PC | 1.0 | Demo | | | |
| Olivers Äventyr: Drakens Förbannelse | PC | | Original | | 021120110 | |
 | Ollo en de Reuzentomaat | PC | | CD-ROM Topper | | | |
| Othello | PC | | Original | | | |
| Othello | PC | | Original | | 99011 | |
| Othello CD-ROM | PC | | Original | | | |
| Outcast | PC | | Original | | | |
| Open Season (Disc 1) | PC | 1.00 | Original | | 5004904-CD 1 | |
 | Open Season (Disc 2) | PC | 1.00 | Original | | 5004904-CD 2 | |
| Open Season (Disc 3) | PC | 1.00 | Original | | 5004904-CD 3 | |
 | Open Season (Disc 1) | PC | 1.00 | Original | | | |
| Open Season (Disc 1) | PC | 1.0 | Original | | 683131-CD1 | |
| Open Season (Disc 2) | PC | 1.0 | Original | | 683131-CD2 | |
| Open Season (Disc 3) | PC | 1.0 | Original | | 683131-CD3 | |
| O.D.T. | PC | | Dice | | DCG 005509 | |
| O.D.T. | PC | | Original | | | |
| O.R.B: Off-World Resource Base | PC | 1.0 | Original | | 22434CD | |
| Obscure
ObsCure | PC | 1.0 | Original | | 719 02 102 | |
| Obscure (Disc 1)
ObsCure | PC | 1.0 | Original | | PCO457CD | |
| Obscure (Disc 2)
ObsCure | PC | 1.0 | Original | | PCO457CD | |
| Obscure (Disc 3)
ObsCure | PC | 1.0 | Original | | PCO457CD | |
| Obscure (Disc 4)
ObsCure | PC | 1.0 | Original | | PCO457CD | |
| Obscure (Disc 5)
ObsCure | PC | 1.0 | Original | | PCO457CD | |
| Obscure II
ObsCure II | PC | 1.0 | Covermount | | | |
| Obsidian (Disc 1)
オブシディアン | PC | | Original | | INR-1003 | |
| Obsidian (Disc 2)
オブシディアン | PC | | Original | | INR-1002 | |
| Obsidian (Disc 3)
オブシディアン | PC | | Original | | INR-1002 | |
| Obsidian (Disc 4)
オブシディアン | PC | | Original | | INR-1002 | |
| Obsidian (Disc 5)
オブシディアン | PC | | Original | | INR-1002 | |
| Obsidian | PC | 1.0 | Demo | | | |
| Obsidian (Disc 1) | PC | | Original | | 11008 | |
| Obsidian (Disc 1) | PC | | Original, Complimentary Copy | | 11008 | |
| Obsidian (Disc 2) | PC | | Original, Complimentary Copy | | 11008 | |
| Obsidian (Disc 3) | PC | | Original, Complimentary Copy | | 11008 | |
| Obsidian (Disc 4) | PC | | Original, Complimentary Copy | | 11008 | |
| Obsidian (Disc 5) | PC | | Original | | 11008 | |
| Obsidian (Disc 5) | PC | | Original, Complimentary Copy | | 11008 | |
| Ocean/Infogrames Show Case December 1997 | PC | | | | | |
| Oceans Below | PC | | Bundle Version OEM | | RVL 13-004-059 Rev. A / 2198610-590002 / I 083100 | |
| Oddballz: Your Wacky Computer Petz | PC | 1.0 | Original | | CS090370 | |
| Oddworld: Abe's Exoddus (Play Disc) | PC | 2.0 | Budget, Covermount | | MMICDR 5280 | |
| Oddworld: Abe's Exoddus (Install Disc) | PC | 2.0 | Original | | | |
| Oddworld: Abe's Exoddus (Play Disc) | 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 (Installatie Disk) | PC | 2.0 | Budget | | MMICDR 5280 | |
| Oddworld: Abe's Exoddus (Play) | PC | | Original | | 04-15993CD2 | |
| Oddworld: Abe's Exoddus (Install) | PC | 2.0 | Original | | 04-15993CD1 | |
| Oddworld: Abe's Oddysee | PC | 2.0 | Original | | IB2G-ODD5 | |
| Oddworld: Abe's Oddysee | PC | 2.0 | Original | | 04-12608CD | |
| Oddworld: Abe's Origins | PC | | Limited Run Games | | | |
| Odell Down Under | PC | | Original, SoftKey | | POD544AE-CD | |
| Odium
ōdi·um | PC | | Covermount | | | |
| Odium
ōdi·um | PC | | Original | | CD-W58-1104-0 | |
| 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 | | ODY-ENCD1 | |
| Odyssey: The Search for Ulysses (Disc 2) | PC | | Original | | ODY-ENCD2 | |
| 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 | | 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 | |
| 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 Limits: Cassiopeia | PC | | ROMWARE | | ROM 10100 | |
| Off Limits: Mizar | PC | | ROMWARE | | ROM 10120 | |
| The Office | PC | | Original | | | |
| Official Duke Nukem 3D Level Design Handbook | PC | | Original | | 1869-0 | |
| 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 Sega Dreamcast Magazine: Special Edition Preview PC CD-ROM | PC | | | | | |
| Offroad Extreme! Special Edition | PC | | Original | | | |
| Ohio Distinctive Software Vol. I | PC | | | | | |
| Oil Platform Simulator | PC | 1.0 | Original | | | |
| Oil Tycoon | PC | 1.01 | Original | | | |
| Old El Paso Recipes for Family Fun | PC | | Original | | | |
| Olympic Games: Atlanta 1996 | PC | | Original | | | |
| Omar Sharif Bridge | PC | 1.0 | Original | | | |
| Omar Sharif on Bridge | PC | | Valueware | | CD-ICD-148-0 | |
| The Omega Stone: Secrets of the Ancients (Disc 1) | PC | | Original | | OMSTENCD1 | |
| The Omega Stone: Secrets of the Ancients (Disc 2) | PC | | Original | | OMSTENCD2 | |
| The Omega Stone: Secrets of the Ancients (Disc 3) | PC | | Original | | OMSTENCD3 | |
| The Omega Stone: Secrets of the Ancients (Disc 4) | PC | | Original | | OMSTENCD4 | |
| 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 | | | |
| On the Ball: League Edition | PC | 1.0 | Original | | | |
| On the Ball: World Cup Edition | PC | 1.00 | Original | | | |
| One Must Fall 2097 | PC | 2.1 | The Smile Edition | | CDR3016 | |
| One Must Fall 2097 | PC | | Demo: JukeBox Collection | | | |
| One Must Fall 2097 | PC | | Original | | EPOMF01 | |
| One Must Fall 2097 | PC | | Original | | EPOMF01 | |
| One Must Fall: Battlegrounds | PC | 2090 | Original | | | |
| One Must Fall: Battlegrounds | PC | 2090 | Original | | | |
| One Step Beyond | PC | | Hit Squad: Regenerator | | | |
| One Unit Whole Blood | PC | 1.21 | Original | | 04-16459CD1 | |
| Oni | PC | 1.0 | Original | | | |
| Oni / 4x4 Evo
Oni / 4x4 Evolution | PC | | Demo | | 12DC1-09GM03-11 | |
| Operation | PC | | General Mills | | | |
| Operation | PC | | General Mills | | AM801R5 | |
| Operation | PC | | General Mills | | AM0703R71 | |
| 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 | | Playable Demo | | POPFCDUS40 | |
| Operation Flashpoint: Cold War Crisis | PC | 1.0 | Original | | MOPFCDUS00 | |
| Operation Flashpoint: Gold Upgrade | PC | 1.30 | Original | | MOFUCDUS00 | |
| Operation Flashpoint: Resistance | PC | 1.75 | Original | | MOFRCDUS00 | |
| Operation Neptune | PC | 1.22 | Original | | ONT744CE-CD | |
| Operation Neptune | PC | 1.23 | The ClueFinders: Math Ages 9-12 | | ONT744EE-CD | |
| Operation Neptune + Reader Rabbit 2 Deluxe! + Ultimate Writing & Creativity Center
The Learning Company 3-in-1 | PC | | | | | |
| Operation Omega | PC | | Original | | 7-20286-92175-1 | |
| Operation Thunderstorm | PC | 1.0 | Original | | | |
| Operation: Surgery Has Never Been so Silly! | PC | | Sold Out Software | | | |
 | The Operational Art of War II | PC | 1.01.02 | Xplosiv | | EI-1259-3 | |
| The Operational Art of War: Century of Warfare | PC | | Original | | | |
| The Operative: No One Lives Forever (Disc 1) | PC | 1.004 | Game of the Year Edition (BestSeller Series) | | S0026178 | |
| 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 | |
| The Operative: No One Lives Forever (Disc 1) | PC | 1.004 | Game of the Year Edition (BestSeller Series) | | JCPL11, S0026695 | |
| 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) | PC | 1.0 | Original | | | |
| 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 | | | |
| The Operative: No One Lives Forever (Disc 2) | PC | 1.004 | Game of the Year Edition, Game of the Year Edition (BestSeller Series), Game of the Year Edition (Covermount) | | JCPL11, S0026179, S0026696 | |
| Opsys | PC | | Original | | | |
| Optimum Resource Sampler | PC | | Rerelease | | | |
| Optimum Resource Sampler | PC | | Original | | | |
| The Oregon Trail 3rd Edition: Pioneer Adventures | PC | 1.0 | DVD-ROM | | ORG811AE-DVD | |
| The Oregon Trail 3rd Edition: Pioneer Adventures (Disc 1) | PC | 1.0 | Original | | OTA744AE-CD1 | |
| The Oregon Trail 3rd Edition: Pioneer Adventures (Disc 1) | PC | 1.2 | Original | | OTA744CE-CD1 | |
| The Oregon Trail 3rd Edition: Pioneer Adventures (Disc 1) | PC | 1.2 | Rerelease | | OTA744BE-CD1 | |
| The Oregon Trail 3rd Edition: Pioneer Adventures (Disc 1) | PC | 1.2a | Bundle Version Compaq Presario OEM | | | |
| The Oregon Trail 3rd Edition: Pioneer Adventures (Disc 1) | PC | 1.3 | The Learning Company | | OAE744BE-CD1 | |
| The Oregon Trail 3rd Edition: Pioneer Adventures (Disc 2) | PC | | Original | | OTA744AE-CD2 | |
| The Oregon Trail 3rd Edition: Pioneer Adventures (Disc 2) | PC | 1.2 | Original | | OTA744BE-CD2 | |
| 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 3) | PC | | Original | | OTA744AE-CD3 | |
| The Oregon Trail 3rd Edition: Pioneer Adventures (Disc 3) | PC | | Original | | OTA744AE-CD3 | |
| The Oregon Trail 3rd Edition: Pioneer Adventures (Disc 3) | PC | 1.2 | Original | | OTA744BE-CD3 | |
| The Oregon Trail 3rd Edition: Pioneer Adventures (Disc 3) | PC | 1.3 | The Learning Company | | OAE744BE-CD3 | |
| The Oregon Trail 4th Edition (Disc 1) | PC | 1 | Original | | OTF744AE-CD1 | |
| The Oregon Trail 4th Edition (Disc 1) | PC | 1.1 | Rerelease | | OTF744BE-CD1 | |
| The Oregon Trail 4th Edition (Disc 2) | PC | 1 | Rerelease | | OTF744CE-CD2 | |
| The Oregon Trail 4th Edition (Disc 2) | PC | 1 | Original | | OTF744AE-CD2 | |
| The Oregon Trail 4th Edition (Disc 2) | PC | 1.1 | Rerelease | | OTF744BE-CD2 | |
| The Oregon Trail 4th Edition (Disc 3) | PC | 1 | Original | | OTF744AE-CD3 | |
| The Oregon Trail 4th Edition (Disc 3) | PC | 1.1 | Rerelease | | OTF744BE-CD3 | |
| 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 | 1.01E | Enhanced Education Version | | 480599-CD | |
| The Oregon Trail 5th Edition: Adventures Along the Oregon Trail | PC | 1.1 | Rerelease, Southwestern School Set | | 380859B-CD | |
| Oregon Trail II | PC | 1.0 | Original | | | |
| Oregon Trail II | PC | 1.3 | Smart Saver | | 0TT744AE-CD | |
| Oregon Trail II | PC | 1.3 | Smart Saver | | 381032-CD/i401ha | |
| 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 | |
| The Oregon Trail | PC | 1.0 | Original | | | |
| The Oregon Trail | PC | 1.1 | Original | | #HCD606 | |
| The Oregon Trail | PC | 1.2 | Original | | #HCD706 | |
| The Oregon Trail | PC | 1.2 | Original | | #HCD706 | |
| The Oregon Trail | PC | 1.21 | | | | |
| The Oregon Trail | PC | 1.22 | Smart Saver | | ORT844AE-CD | |
| The Oregon Trail | PC | 3.0.1 | Slash | | CDRM1239790 | |
| The Oregon Trail: Classic Edition | PC | | SoftKey | | POT144BE-CD | |
| The Oregon Trail: Classic Edition | PC | 3.0.1 | SoftKey | | POT144CE-CD | |
| The Original Links | PC | | Solid Gold Edition | | | |
| The Original Mulan
花木兰 | PC | | Original | | | |
| The Orion Conspiracy | PC | 1.01 | Original | | | |
| Orly's Draw-A-Story | PC | | Original | | | |
| Oscar | PC | | Golden Zone | | | |
| Oscar | PC | | Original | | | |
| Oscar | PC | | Jackson Libri | | | |
| Oscar Wilde's The Selfish Giant | PC | 2.10 | Original | | MQ 13-004-144 | |
| Out of This World | PC | | Valueware | | CD-ICD-142-0 | |
| Out of This World | PC | | Rerelease | | CD-MMC-023-0 | |
| Outburst | PC | | Classic Value Series | | Product# 99043 | |
| Outcast (Disc 1) | PC | | Original | | OUTCAPC52G/A1 | |
| Outcast (Disc 2) | PC | | Original | | OUTCAPC52G/A2 | |
| Outcast (Disc 1) | PC | | Original | | 42831-9110TC | |
| Outcast (Disc 2) | PC | | Original | | 42831-9110TC | |
| Outcry (Disc 1)
Outcry: The Dawn | PC | Version DPV 1.0 | Original | | PCO596CD | |
| Outcry (Disc 2)
Outcry: The Dawn | PC | Version DPV 1.0 | Original | | PCO596CD | |
| Outer Ridge | PC | 1.0 | Original | | SPI004 | |
| Outlast: A Reading for Information Game | PC | | Original | | HH824 | |
| Outlaw Golf | PC | | Original | | RM-OUTGOLF-UK | |
| Outlaws (Disc 1) | PC | 1.0 | Original | | 9511830 | |
| Outlaws (Disc 1) | PC | 2.0 | LucasArts Classics | | 3000009.101.UK | |
| Outlaws (Disc 2) | PC | 1.0 | Original | | 9511831 | |
| Outlaws (Disc 2) | PC | 2.0 | LucasArts Classics | | 3000009.102.UK | |
| Outlaws (Disc 1) | PC | | Original | | | |
| Outlaws (Disc 2) | PC | | Original | | | |
| Outlaws (Disc 1) | PC | 1.0 | Original | | | |
| Outlaws (Disc 2) | PC | 1.0 | Original | | | |
| Outlaws (Demonstration Program) | PC | Demo 1.0 CD Build 3 | Demo | | 644230 | |
| Outlaws (Disc 1) | PC | 1.0 Build 3 | Original | | 9511830 | |
| Outlaws (Disc 1) | PC | 1.0 Build 3 | Bundle Version Diamond OEM | | 644430 | |
| 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 | 1.0 Build 3 | Original | | 9511831 | |
| Outlaws (Disc 2) | PC | 1.0 Build 3 | Bundle Version Diamond OEM | | 644431 | |
| Outlaws (Disc 2) | PC | 2.0 | Rerelease | | 9511831 | |
| Outlaws (Disc 2) | PC | 2.0 | Rerelease | | 9511831 | |
| Outlaws (Disc 2) | PC | 2.0 | Rerelease | | 9511831 | |
| Outlive | PC | 1.01 | Original | | | |
| Outlive | PC | 1.01 | Original | | | |
| Outpost | PC | | Original | | S390021012ZZ2 | |
| Outpost | PC | | Original | | S725430 | |
| Outpost | PC | 1.1 | Rerelease | | S725431 | |
| Outpost | PC | 1.5 | Rerelease, Sierra Originals | | | |
| Outpost 2: Divided Destiny | PC | | SierraOriginals | | | |
| Outpost 2: Divided Destiny | PC | 1.0 | Original | | S0011246 | |
| Outpost 2: Divided Destiny | PC | 1.2.0.5 | Original | | | |
| Outpost 2: Divided Destiny | PC | 1.2.0.5 | Original | | | |
| Outwars (Disc 1) | PC | 1.0 | Original | | 0298 Part No. X03-63527 | |
| 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 2) | PC | 1.0 | Original | | 0298 Part No. X03-57509 | |
| 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 200 Programs for Windows
STG Computers LTD Windows Extra CD-ROM | PC | | Original | | | |
| Over 350 Jigsaw Puzzles | PC | | Original | | 012163 | |
| Over 350 Solitaire Games | PC | | Original | | | |
| Overboard! | PC | | Original | | | |
| Overboard! | PC | | Dice | | DCG 005752, DMM 005776 | |
| Overboard! | PC | | Dice | | DCG 005752, DMM 005776 | |
| OverKill | PC | | ROMWARE | | ROM 10 007 | |
| Overlord | PC | 1.0 | Original | | MOVL1CDFC00 | |
| Overlord II | PC | 1.0 | Original | | MOVL2CDUS00 | |
| Overlord: Raising Hell | PC | 1.3 | Original | | MOVLRCDEU00 | |
| Owlboy (Game Disc) | PC | 0.0.6152.604 | IndieBox | | | |
| The Oxfordshire Golf Club | PC | | Original | | EAE05101006D | |
| Oxide
Oxyde | PC | | Dynamite | | DE-006 | |
| Oz: The Magical Adventure | PC | | Original | | | |
| Oz: The Magical Adventure | PC | 7.0.0.198 | Rerelease | | 92785 | |
| Ozzie's World | PC | | Original | | | |
| Offensive | PC | | Original | | | |
| Offensive
Offensive War: The Ultimate Strategical Combat Game | PC | | Covermount | | | |
| Omikron: The Nomad Soul | PC | | Promo | | | |
| Oni | PC | 1.0 | Original | | | |
| Oni | PC | 1.0 | Green Pepper | | | |
 | Oro Negro: Juego de Guerra y Estrategia | PC | | Covermount | | | |
| Obduction | PC | 1.4.2 | Kickstarter | | | |
| Obscure II
ObsCure II | PC | | Original | | | |
| Official Formula 1 Racing | PC | | Original | | | |
| Offroad
Off-Road Redneck Racing | PC | | Original | | OFFPCCDML | |
| Offroad
Off-Road Redneck Racing | PC | | Original | | ECD 000592K | |
| Olympic Soccer | PC | | CD-ROM Classic Collection 2 | | | |
| Onimusha 3 | PC | | Original | | 5004561 | |
| Onimusha 3: Demon Siege (Disc 1) | PC | | Original | | 683100-CD1 | |
| Onimusha 3: Demon Siege (Disc 2) | PC | | Original | | 683100-CD2 | |
| Onimusha 3: Demon Siege (Disc 3) | PC | | Original | | 683100-CD3 | |
| Open Season (Disc 1) | PC | | Original | | 5004905-CD 1 | |
| Open Season (Disc 2) | PC | | Original | | 5004905-CD 2 | |
| Open Season (Disc 3) | PC | | Original | | 5004905-CD 3 | |
| Operation Flashpoint: Cold War Crisis | PC | 1.0 | Original | | MOPFCDEU00 | |
| Operation Flashpoint: Cold War Crisis | PC | 1.0 | Original, Gold Edition | | MOPFCDEU00 | |
| Operation Flashpoint: Cold War Crisis | PC | | The Games Collection | | | |
| Operation Flashpoint: Dragon Rising | PC | 1.0 | Original | | MOFP2CDEU00 | |
| Operation Flashpoint: Dragon Rising | PC | | Original | | MOFP2CDEU00 | |
| Operation Flashpoint: Gold Upgrade | PC | 1.30 | Original, Gold Edition | | MOFUCDEU00, MOFUCDUS00 | |
| Operation Flashpoint: Red River | PC | 1.0 | Original | | MOFP3CDEU00 | |
| Operation Flashpoint: Resistance | PC | 1.75 | Original | | MOFRCDEU00 | |
| Ori and the Blind Forest: Definitive Edition | PC | 5.3.2.9582331 | Limited Edition | | | |
| Outrage | PC | | Original | | | |
| OutRun 2006: Coast 2 Coast | PC | | Gamer's Choice | | THQ70690 | |
| OutRun 2006: Coast 2 Coast | PC | | GSP White Label: Reload | | 1673A | |
| OutRun 2006: Coast 2 Coast | PC | | White Label | | 1673A | |
| OutRun 2006: Coast 2 Coast | PC | 1.0 | Original | | SEGA-PC029 | |
| OutRun 2006: Coast 2 Coast | PC | 1.00.0000 | Serie Maxima II | | SEGA-PC029 | |
| OutRun 2006: Coast 2 Coast | PC | | eXtra Klasyka XK HIT | | TS OCC PL | |
| OutRun 2006: Coast 2 Coast | PC | | Top Games | | SEGA-PC029 | |
| OutRun 2006: Coast 2 Coast (Disc 1) | PC | | Original | | | |
| OutRun 2006: Coast 2 Coast (Disc 2) | PC | | Original | | | |
| Outward | PC | | Day One Edition | | 1024669LAINT, 103699 | |
| Overlord II | PC | | Original | | MOVL2CDEU00 | |
| 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 | |
| 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 | |
| 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 | | | |
| One Must Fall 2097
One Must Fall 2097 CD-ROM | PC | 1.1 | ROMWARE | | ROM 10017 | |
 | One Must Fall 2097 | PC | | Original | | | |
| One Must Fall 2097
One Must Fall | PC | | Rerelease | | D.L.: M-8684-97 | |
| One Must Fall 2097 | PC | 1.1 | Demo | | | |
| Oscar der Ballonfahrer und die Geheimnisse des Waldes | PC | | | | | |
| Oil Rush | PC | | Original | | | |
| Oni | PC | 1.0 | Covermount | | | |
| Oni | PC | 1.0 | Covermount | | | |
 | Oni | PC | 1.0 | PC Best Buy | | 177588 | |
| Ozzie's World
オジィーズワールド | PC | | Original | | ASOW-71110 | |
| Ost-Indskaya kompaniya: Zolotoe izdanie
Ост-Индская компания: Золотое издание | PC | | Original | | | |
| Oddworld: L'Odyssée d'Abe | PC | | Original | | IB2G-ODDF5 | |
| Outcast (Disc 1) | PC | | Original | | OUTCAPC52F/A1 | |
| Outlaws (Disc 1) | PC | | M6 Multimedia | | M6IMM6 | |
| Outlaws (Disc 1) | PC | 2.0 | Collection LucasArts | | | |
| Outlaws (Disc 2) | PC | | M6 Multimedia | | M6IMM6 | |
| Outlaws (Disc 2) | PC | 2.0 | Collection LucasArts | | | |
| Odyssee: Auf der Suche nach Odysseus (Disc 1) | PC | | Original | | ODY-GERCD1 | |
| Odyssee: Auf der Suche nach Odysseus (Disc 2) | PC | | Original | | ODY-GERCD2 | |
| Outpost | PC | | SierraOriginals | | S4941220Z12Z2 | |
| Outpost | PC | | Original | | S 390121012ZZZ | |
| Outpost | PC | 1.51 | Schweinepreise | | S390122CZ12ZZ | |
| Obscure
ObsCure | PC | | Original | | | |
| Obscure
ObsCure | PC | 1.1 | Covermount | | | |
| O.D.T. | PC | | Original | | | |
| Obsidian (Disc 1) | PC | | Original | | | |
| Obsidian (Disc 2) | PC | | Original | | | |
| Obsidian (Disc 3) | PC | | Original | | | |
| Obsidian (Disc 4) | PC | | Original | | | |
| Obsidian (Disc 5) | PC | | Original | | | |
| Ocean Jewels | PC | | Red Rocks | | | |
| Oddworld: Abe's Exoddus (CD Installieren) | PC | 2.0 | Original | | | |
| Oddworld: Abe's Exoddus (CD Abspielen) | PC | 2.0 | Original | | | |
| Oddworld: Abe's Oddysee | PC | 2.0 | Original | | IB2G-ODDG5 | |
| 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 | | | |
| Ogallala: Das Kartenspiel für PC | PC | | Original | | ECD000799D 00031111-001 | |
| Oil Tycoon | PC | 1.0 | Original | | | |
| Oil Tycoon 2 | PC | | Original | | | |
| OIO: The Game: Enlarged | PC | | F*ckn' Best of Independent Games: Collection Vol. 1 | | | |
| Oktoberfest Wiesn-Gaudi | PC | 1.0 | Original | | | |
| Oldtimer: Erlebte Geschichte Teil II | PC | | Original | | | |
| Olympic Soccer | PC | | Kixx | | | |
| Onkel Alberts geheimnisvolles Notizbuch | PC | | Original | | | |
| Opera Fatal | PC | | Tandem | | 1444 | |
| Opera Fatal | PC | | Original | | | |
| Operation Barbarossa: The Struggle for Russia | PC | | Original | | | |
| The Operational Art of War II: 1956-2000
The Operational Art of War II: Bewaffnete Konflikten | PC | | Original | | | |
| The Operative: No One Lives Forever (Disc 1) | PC | 1.004 | Game of the Year Edition | | S0025036 | |
| The Operative: No One Lives Forever (Disc 2) | PC | 1.004 | Game of the Year Edition | | S0025037 | |
| Die Original Moorhuhn Jagd | PC | | Best of Moorhuhn | | | |
| Orion Burger | PC | | Original | | | |
| Orion Burger | PC | | Gold Games 2 (CD 11) | | SPI 046 | |
| Orion Burger | PC | | Abenteuer Doppelpack: Premier Collection | | MOBRLPGE72 | |
| Outbreaker | PC | | Original | | | |
| Outcast (Disc 1) | PC | | Play the Games Vol. 3 | | | |
| Outcast (Disc 1) | PC | | Limitierte Sonderausgabe | | OUTCAPC520/A1 | |
| Outcast (Disc 2) | PC | | Limitierte Sonderausgabe | | OUTCAPC520/A2 | |
| Outcast (Disc 2) | PC | | Play the Games Vol. 3 | | | |
| Outcast (Disc 3) | PC | | Limitierte Sonderausgabe | | OUTCAPC520/A3 | |
| The Outforce | PC | 1.0.0.0 | Original | | | |
| Outlaws (Disc 1) | PC | 1.1 | Rerelease | | | |
| Outlaws (Disc 2) | PC | 1.1 | Rerelease | | | |
| Outlaws: Die Gesetzlosen (Disc 1) | PC | 1.1.1 | Original | | | |
| Outlaws: Die Gesetzlosen (Disc 2) | PC | 1.1.1 | Original | | | |
| Outpost 2: Geteilte Bestimmung | PC | 1.0 | Original | | S0011248 | |
| Outwars (Disc 1) | PC | 1.0 | Original | | 0398 Artikelnr. X00-14039 DE | |
| Outwars (Disc 2) | PC | 1.0 | Original | | 0398 Artikelnr. X00-14040 DE | |
| Overlord | PC | | Original | | MOVL1CDEU00 | |
| Oxyd Magnum! Gold Edition | PC | | Game-Pack 3 | | 80227 | |
| Obscure
ObsCure | PC | | Original | | 71902134 | |
| Obscure
ObsCure | PC | | Software Pyramide | | | |
| Obscure
ObsCure | PC | | Best of Atari | | | |
 | O Xephteris Taxideuei stin Ellada
Ο Ξεφτέρης ταξιδεύει στην Ελλάδα | PC | | Original |  | | |
| Odysseia
ΟΔΥΣΣΕΙΑ | PC | 1.8 | Original | | | |
| Opsys | PC | | Original | | | |
| O.R.B: Off-World Resource Base | PC | | Covermount | | | |
| 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 | | | |
| Oddworld: Abe's Exoddus (Installazione) | PC | 1.0 | Replay | | ABEXPCREI/A1 | |
| Oddworld: Abe's Exoddus (Gioco) | PC | 1.0 | Replay | | ABEXPCREI/A2 | |
| Oddworld: Abe's Oddysee | PC | 2.0 | Covermount | | IB2G-ODDI5 | |
| Odissea: Sulle tracce di Ulisse (Disc 1) | PC | | Original | | ODY-ITA-P01 | |
| Odissea: Sulle tracce di Ulisse (Disc 2) | PC | | Original | | ODY-ITA-P02 | |
| Oil Tycoon 2
Oil Tycoon 2: Il Ritorno di una Leggenda | PC | | EXA Games | | EXAG020 | |
| Omnia Junior 1: Enciclopedia: Dizionario | PC | | Covermount | | SIAE 08A01PA | |
| Omnia Junior 2: Storia: Attività interattive | PC | | Covermount | | SIAE 0901PA | |
| Omnia Junior 3: Il Mondo degli Animali | PC | | Covermount | | SIAE1001PA | |
| Open Kart | PC | | I Videogiochi del "Giornalino" | | | |
| Original War (Disc 1) | PC | 1.02 | Covermount | | | |
| Original War (Disc 1) | PC | 1.02 | Original | | CD-W95-V006-IT1 | |
| Original War (Disc 2) | PC | 1.02 | Covermount | | | |
| Original War (Disc 2) | PC | 1.02 | Original | | CD-W95-V006-IT2 | |
| Oro e Gloria: La Strada per El Dorado | PC | | Covermount | | | |
| Ostrich Runner | PC | | Microforum | | | |
| Outcast (Disc 1) | PC | | Covermount | | | |
| Outcast (Disc 2) | PC | | Covermount | | | |
| Outlaws (Disco 1) | PC | 1.0 | LucasArts Classic | | 41175.101.IT | |
| Outlaws (Disco 2) | PC | 1.0 | LucasArts Classic | | 41175.102.IT | |
| Outlaws (Disco 1) | PC | 2.0 | Collezione CD-Rom by C.T.O. | | LUC628 | |
| Outlaws (Disco 2) | PC | 2.0 | Collezione CD-Rom by C.T.O. | | LUC628 | |
| Outpost 2: Destini Sospesi | PC | 1.0 | Covermount | | | |
| Overclocked: Una Storia di Violenza | PC | 1.1 | Original | | | |
| Obbligato (Taikenban CD-ROM)
オブリガート 体験版CD-ROM | PC | | Demo | | | |
| Obsidian (Disc 1)
オブシディアン | PC | 1.0 | Original | | INR-1003 | |
| Obsidian (Disc 2)
オブシディアン | PC | 1.0 | Original | | INR-1003 | |
| Obsidian (Disc 3)
オブシディアン | PC | 1.0 | Original | | INR-1003 | |
| Obsidian (Disc 4)
オブシディアン | PC | 1.0 | Original | | INR-1003 | |
| Obsidian (Disc 5)
オブシディアン | PC | 1.0 | Original | | INR-1003 | |
| Ochazukenori: Kaiki!! Mushi Danshaku no Yakata
御茶漬海苔 怪奇！！蟲男爵の館 | PC | | Original | | | |
| Oda Nobunaga Den
織田信長伝 | PC | 1.0 | Original | | KN11-93101 | |
| Ohinasama: Shiawase wa Suigin no Aji
オヒナサマ ～しあわせは水銀の味～ | PC | 2.00 | Original | | SPCG-10001 | |
| On Air | PC | | Original | | BROWNIE 990201 | |
| 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 | |
| Onegai Countdown
おねがいカウントダウン | PC | | Original | | YMH-0013 | |
| Oni | PC | 1.00.000 | Original | | MTW-0390 | |
| Oni no Kamen
鬼ノ仮面 | PC | 1.00 | Original | | | |
| Onii-chan Jushin-chuu
お兄ちゃん受信中 | PC | | Original | | | |
| Onikiri-den
鬼斬伝 | PC | | Original | | ZEUS-00001 | |
| 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 | |
| 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 | |
