| Region | Title | System | Version | Edition | Languages | Serial | Status |
|---|
 | Objectif Transparence | CDI | | Original | | RP IND 4 94 |  |
| Objectif Transparence | CDI | | Original | | RP IND 4 94 | |
 | Obsidian (Disc 1) | MAC | | Original, Great Series | | INR-001, MKM-001 | ![2 and more dumps from original media [!]](/images/status/green.png "2 and more dumps from original media [!]") |
| Obsidian (Disc 2) | MAC | | Original, Great Series | | INR-001, MKM-001 | |
| Obsidian (Disc 3) | MAC | | Original, Great Series | | INR-001, MKM-001 | |
| Obsidian (Disc 4) | MAC | | Original, Great Series | | INR-001, MKM-001 | |
| Obsidian (Disc 5) | MAC | | Original, Great Series | | INR-001, MKM-001 | |
| Oceans Below
オーシャンズ・ビロウ | MAC | | Original | | MSC001 | |
 | Oceans Below
The Software Toolworks Presents ... Oceans Below | MAC | | Original | | 2198620-590001 / I 073100, CDRM1103420 | |
 | Oct 15 2002 | PC | | Press Kit | | | |
 | Oddworld: Abe's Exoddus: UK Packaging | MAC | | Art Assets | | | |
| Oddworld: Abe's Exoddus: US Manual | MAC | | Art Assets | | | |
| Oddworld: Abe's Oddysee | PC | 2.0 | Channelware | | 04-15303 | |
| ODN Palm Power Pack | PALM | | Original | | | |
| Off-Road Redneck Racing | PC | | Original | | CD-C98-1259-0 | |
| Off-World Interceptor Extreme | SS | 1.000 | Original | | T-15908H | |
| The Official Browser of Primagames.com | PC | | | | | |
| 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 | | | | |
 | Oh No! More Creatures | PC | | Tewi | | Bestell-Nr. 27665 | |
| Oh!PC 1998-nen 10-gatsugou 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-gatsugou Tokubetsu Furoku CD-ROM
Ｏｈ！ＰＣ １９９８年 １１月号 特別付録ＣＤ－ＲＯＭ | PC | | | | OHPC-9811 | |
| Oh!PC 1998-nen 12-gatsugou Tokubetsu Furoku CD-ROM
Ｏｈ！ＰＣ １９９８年 １２月号 特別付録ＣＤ－ＲＯＭ | PC | | | | OHPC-9812 | |
| Oh!PC 1998-nen 8-gatsugou 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-gatsugou Tokubetsu Furoku CD-ROM
Ｏｈ！ＰＣ １９９８年 ９月号 特別付録ＣＤーＲＯＭ | PC | | | | OHPC-9809 | |
| Oh!PC 1999-nen 1-gatsugou Tokubetsu Furoku CD-ROM
Ｏｈ！ＰＣ １９９９年 １月号 特別付録ＣＤ－ＲＯＭ | PC | | | | OHPC-9901 | |
| Oh!PC 1999-nen 10-gatsugou Tokubetsu Furoku CD-ROM
Ｏｈ！ＰＣ １９９９年 １０月号 特別付録ＣＤ－ＲＯＭ | PC | | | | OHPC-9910 | |
| Oh!PC 1999-nen 11-gatsugou Tokubetsu Furoku CD-ROM
Ｏｈ！ＰＣ １９９９年 １１月号 特別付録ＣＤ－ＲＯＭ | PC | | | | OHPC-9911 | |
| Oh!PC 1999-nen 12-gatsugou Tokubetsu Furoku CD-ROM
Ｏｈ！ＰＣ １９９９年 １２月号 特別付録ＣＤ－ＲＯＭ | PC | | | | OHPC-9912 | |
| Oh!PC 1999-nen 2-gatsugou Tokubetsu Furoku CD-ROM
Ｏｈ！ＰＣ １９９９年 ２月号 特別付録ＣＤ－ＲＯＭ | PC | | | | OHPC-9902 | |
| Oh!PC 1999-nen 3-gatsugou Tokubetsu Furoku CD-ROM
Ｏｈ！ＰＣ １９９９年 ３月号 特別付録ＣＤ－ＲＯＭ | PC | | | | OHPC-9903 | |
| Oh!PC 1999-nen 4-gatsugou Tokubetsu Furoku CD-ROM (Disc A) (FreeBSD 2.2.8-RELEASE Install Disc)
Ｏｈ！ＰＣ １９９９年 ４月号 特別付録ＣＤーＲＯＭ | PC | | | | OHPC-9904A | |
| Oh!PC 1999-nen 4-gatsugou Tokubetsu Furoku CD-ROM (Disc B) (FreeBSD 2.2.8-RELEASE Packages & Applications)
Ｏｈ！ＰＣ １９９９年 ４月号 特別付録ＣＤーＲＯＭ | PC | | | | OHPC-9904B | |
| Oh!PC 1999-nen 5-gatsugou Tokubetsu Furoku CD-ROM
Ｏｈ！ＰＣ １９９９年 ５月号 特別付録ＣＤ－ＲＯＭ | PC | | | | OHPC-9905 | |
| Oh!PC 1999-nen 6-gatsugou Tokubetsu Furoku CD-ROM
Ｏｈ！ＰＣ １９９９年 ６月号 特別付録ＣＤ－ＲＯＭ | PC | | | | OHPC-9906 | |
| Oh!PC 1999-nen 7-gatsugou Tokubetsu Furoku CD-ROM
Ｏｈ！ＰＣ １９９９年 ７月号 特別付録ＣＤ－ＲＯＭ | PC | | | | OHPC-9907 | |
| Oh!PC 1999-nen 8-gatsugou Tokubetsu Furoku CD-ROM
Ｏｈ！ＰＣ １９９９年 8月号 特別付録ＣＤ－ＲＯＭ | PC | | | | OHPC-9908 | |
| Oh!PC 1999-nen 9-gatsugou Tokubetsu Furoku CD-ROM
Ｏｈ！ＰＣ １９９９年 ９月号 特別付録ＣＤ－ＲＯＭ | PC | | | | OHPC-9909 | |
| Oh!PC 2000-nen 1-gatsugou Tokubetsu Furoku CD-ROM
Ｏｈ！ＰＣ ２０００年 １月号 特別付録ＣＤ－ＲＯＭ | PC | | | | OHPC-0001 | |
| Oh!PC 2000-nen 2-gatsugou Tokubetsu Furoku CD-ROM
Ｏｈ！ＰＣ 2000年 2月号 特別付録ＣＤ－ＲＯＭ | PC | | | | OHPC-0002 | |
| Oh!PC 2000-nen 3-gatsugou Furoku CD-ROM
Ｏｈ！ＰＣ 2000年 3月号 付録ＣＤ－ＲＯＭ | PC | | | | OHPC-0003 | |
| Oh!PC 2000-nen 4-gatsugou Tokubetsu Furoku CD-ROM
Ｏｈ！ＰＣ ２０００年 ４月号 特別付録ＣＤ－ＲＯＭ | PC | | | | OHPC-0004 | |
| Oh!PC 2000-nen 5-gatsugou Tokubetsu Furoku CD-ROM
Ｏｈ！ＰＣ ２０００年 5月号 特別付録ＣＤ－ＲＯＭ | PC | | | | OHPC-0005 | |
| Oh!PC 2000-nen 6-gatsugou Tokubetsu Furoku CD-ROM
Ｏｈ！ＰＣ ２０００年 ６月号 特別付録ＣＤ－ＲＯＭ | PC | | | | OHPC-0006 | |
| Oh!PC 2000-nen 7-gatsugou Tokubetsu Furoku CD-ROM
Ｏｈ！ＰＣ ２０００年 7月号 特別付録ＣＤ－ＲＯＭ | PC | | | | OHPC-0007 | |
| Oh!PC 2000-nen 8-gatsugou Tokubetsu Furoku CD-ROM
Ｏｈ！ＰＣ ２０００年 8月号 特別付録ＣＤ－ＲＯＭ | PC | | | | OHPC-0008 | |
| 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 | | | | | |
 | Oil of Ulay: Colour Collection: Colour Consultant | CDI | | Original | | | |
| Okano Software Classics: Volume 2 | PC | | Original | | | |
| Oldtimer | PHOTO-CD | | Original | | 813 0067 | |
| Ollie King
オーリーキング | CHIHIRO | 1.003 | Original | | GDX-0007 | |
 | Omgaan met Steriele Medische Hulpmiddelen
Omgaan met Steriele Medische Hulp-Middelen | CDI | | Original | | | |
| Omgaan met Steriele Medische Hulpmiddelen | CDI | | Demo | | | |
| On the Rain-Slick Precipice of Darkness: Episode One | PC | | Demo | | | |
 | De Onderwateravonturen van Flipper & Co | PC | | Original | | 06DSILK36 | |
| One Step Ahead | CDI | | | | Demo 10.05.94 | |
| Oni | MAC | 1.1 | Original | | | |
| Oni | MAC | | 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 | | | |
 | Onimusha 3 (Patch PL) | PC | | PC Game Bundle | | CENEGA 443/2006 | |
| Online Arena: Disc 1: Edition 2000 | PC | | | | | |
| Online G@mer n. 5: Juin/Juillet 2001 (Disc 1) | PC | | | | | |
 | Online Start-Up Disc v1.0
Disco de Inicio en Línea v1.0 | PS2 | 1.00 | Original | | PBPX 95250 … | |
 | Only Fun: Entra anche tu nel mondo dei Videogames | PC | | | | | |
| Ontdek de Interactieve Wereld van Neckermann | CDI | | Original | | | |
| Oogst van de Zon | CDI | | Original | | 814 0004 | |
| Op Avontuur in de Molen | PC | | Original | | 5991 | |
| Op Avontuur in de Vuurtoren | PC | | Original | | 5990 | |
| Op Avontuur in het Piratenschip | PC | | Original | | 5989 | |
| Opel Corsa '97 | PHOTO-CD | | Original | | | |
| Opel IAA '97 | PHOTO-CD | | Original | | | |
| Opel IAA '99 (Disc 1) (Model Range) | PHOTO-CD | | Original | | | |
| Opel IAA '99 (Disc 2) (Opel Highlights) | PHOTO-CD | | Original | | | |
| Opel Vectra '99 | PHOTO-CD | | Original | | | |
| Open Universiteit: Practicum Toxicologische Histopathologie
Open University: Practical Toxicological Histopathology | CDI | | Original | | 4589 | |
| 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 Silent Storm: Chasovye (Disc 1)
Операция Silent Storm: Часовые | PC | | 1C: Igroteka | | | |
| Operaciya Silent Storm: Chasovye (Disc 2)
Операция Silent Storm: Часовые | PC | | 1C: Igroteka | | | |
| Operacja Pustynny Grom / The Partners | PC | | Covermount | | | |
| Operation AirStorm | PC | | Original | | 0860140921 | |
| Operation Flashpoint: Cold War Crisis | PC | 1.46 | Sold Out Software | | | |
| Operation Mittelmeer | PC | | Original | | | |
| Operation: Surgery Has Never Been so Silly! | PC | | Replay Kids | | OPERPCREGB/A | |
| The Operational Art of War: Vol. 1: 1939-1955 | PC | | | | | |
| The Operative: No One Lives Forever (Disc 1) | PC | | Game of the Year Edition | | | |
| OptImage CD-I 220 Adjustment Disc | CDI | | Original | | | |
| OptImage CD-I Starter System: Sampler Disc: Version 1.1 | CDI | | | | | |
| OptImage Media Showcase | CDI | 1.0 | Original | | | |
| Oregon Trail II | PC | 1.31 | Rerelease | | HCD744BE-CD | |
| Oregon Trail II + Logic Quest | PC | 1.2/1.0 | Original | | | |
