| Region | Title | System | Version | Edition | Languages | Serial | Status |
|---|
 | Noctropolis | PC | 1.0 | Original |  | 7197 | ![2 and more dumps from original media [!]](/images/status/green.png "2 and more dumps from original media [!]") |
 | Nocturne (Disc 1) | PC | 1.00.47 | Original |      | NOCT/CDCRYST/EFGSI | |
| Nocturne (Disc 2) | PC | 1.00.47 | Original | | NOCT/CDCRYST/EFGSI | |
| Nocturne (Disc 1) | PC | 1.00.52 | Original | | | |
| Nocturne (Disc 2) | PC | 1.00.52 | Original | | | |
 | Nocturne (Disc 1)
ノクターン | PC | 1.00.47 | Original, BIS Collezione CD-ROM, Rerelease | | | |
| Nocturne (Disc 2)
ノクターン | PC | 1.00.47 | Original, BIS Collezione CD-ROM, Rerelease | | | |
| The Nomad Soul (Disc 1) | PC | 1.0 | Original | | | |
| The Nomad Soul (Disc 2) | PC | 1.0 | Original | | | |
| The Nomad Soul (Disc 3) | PC | 1.0 | Original | | | |
| Normality | PC | 1.0 (UK) | Original | | | |
| Normality | PC | | Original | | CD-ICD-195-0 | |
| Norse by Norsewest: The Return of the Lost Vikings
Norse by Norse West: The Return of the Lost Vikings | PC | 1.0c | Original | | CD-H95-365-0 | |
 | North & South | PC | | Green Pepper | | | |
| Novalogic Presents the World of Combat | PC | | Original | | | |
| Novastorm | PC | 1.0 | Original | | NOVA PCCD | |
| Novastorm | PC | 1.0 | Megapak 3 | | | |
| Novastorm | PC | 1.0 | Bundle Version OEM | | CDRS1241790 | |
| Nox (Disc 1) | PC | | Dice | | DCG 013269 | |
| Nox (Disc 1) | PC | 1.0 | Original, EA Classics | | WWE08902999D1 | |
| Nox (Disc 2) | PC | | Dice | | DCG 013269 | |
| Nox (Disc 2) | PC | 1.0 | Original, EA Classics | | WWE08902999D2 | |
| Nox (Disc 3) (Manuals Disc) | PC | | Dice | | DCG 013269 | |
| Nox | PC | | Preview CD | | | |
| Nox (Disc 1) | PC | 1.0 | Original | | 799307 | |
| Nox (Disc 2) | PC | 1.0 | Original | | 799317 | |
| Nuclear Strike | PC | | CD-ROM Classics: Gold Edition, CD-ROM Classics: Silver Edition | | 1127307, 1170207 | |
| Nuke It
"Nuke It" | PC | 2.0 | Rerelease | | | |
| NYR: New York Race | PC | | Original |  | NYR 001 - CD, NYR 019 - CD | |
| 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, Complimentary Copy | | 11008 | |
| 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 (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 | |
| Odell Down Under | PC | | Original, SoftKey | | POD544AE-CD | |
| Odium
ōdi·um | PC | | Original | | CD-W58-1104-0 | |
| 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 | |
| Official Formula 1 Racing | PC | | Original | | | |
| The Official Guide to Babylon 5
The Official Guide to J. Michael Straczynski's Babylon 5 | PC | | Original | | | |
| Official Sega Dreamcast Magazine: Special Edition Preview PC CD-ROM | PC | | | | | |
| Ohio Distinctive Software Vol. I | PC | | | | | |
 | Oil Tycoon | PC | 1.01 | Original | | | |
 | 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 | | | |
| 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 | | | |
 | One Must Fall 2097
One Must Fall | PC | | Covermount | | D.L.: M-8684-97 | |
| One Unit Whole Blood | PC | 1.21 | Original | | 04-16459CD1 | |
 | Oni
奥妮 | PC | 1.7 | Original |  | | |
| Oni | PC | 1.0 | Original | | | |
| Oni | PC | 1.0 | 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 | |
| Operation | PC | | General Mills | | AM801R5 | |
| Operation Flashpoint: Cold War Crisis | PC | 1.0 | Original, Gold Edition | | MOPFCDEU00 | |
 | Operation Flashpoint: Cold War Crisis | PC | | The Games Collection | | | |
| Operation Flashpoint: Cold War Crisis | PC | 1.0 | Original | | MOPFCDUS00 | |
| Operation Flashpoint: Gold Upgrade | PC | 1.30 | Original | | MOFUCDUS00 | |
 | Operation Flashpoint: Gold Upgrade | PC | 1.30 | Original, Gold Edition | | MOFUCDEU00, MOFUCDUS00 | |
| Operation Flashpoint: Resistance | PC | 1.75 | Original | | MOFRCDEU00 | |
| Operation Flashpoint: Resistance | PC | 1.75 | Original | | MOFRCDUS00 | |
| The Operational Art of War: Century of Warfare | PC | | Original | | | |
| The Operative: No One Lives Forever (Disc 1) | PC | 1.0 | Original |  | FXX08903223D1 | |
| 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 2) | PC | 1.0 | Original | | FXX08903223D2 | |
 | 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)
In the Lounge with No One Lives Forever | 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, S0026707 | |
| The Oregon Trail 3rd Edition: Pioneer Adventures (Disc 1) | PC | 1.0 | Original | | OTA744AE-CD1 | |
| The Oregon Trail 3rd Edition: Pioneer Adventures (Disc 2) | PC | | Original | | OTA744AE-CD2 | |
| The Oregon Trail 3rd Edition: Pioneer Adventures (Disc 3) | PC | | Original | | OTA744AE-CD3 | |
| The Oregon Trail 4th Edition (Disc 1) | PC | 1.1 | Rerelease | | OTF744BE-CD1 | |
| The Oregon Trail 4th Edition (Disc 2) | PC | 1.1 | Rerelease | | OTF744BE-CD2 | |
| 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 | 1.1 | Rerelease, Southwestern School Set | | 380859B-CD | |
| Oregon Trail II | PC | 1.0 | Original | | | |
| Oregon Trail II | PC | 1.3 | Smart Saver | | 381032-CD/i401ha | |
| Oregon Trail II | PC | 1.31 | Rerelease | | #HCD744AE-CD | |
| Oregon Trail II: 25th Anniversary Limited Edition | PC | 1.3 | Original, SoftKey | | #OTR744AE-CD | |
