Region | Title | System | Version | Edition | Languages | Serial | Status |
| Obduction | MAC | | Kickstarter | | | |
| ObsCure | XBOX | | Original | | MI-009 | |
| ObsCure: The Aftermath | WII | | Beta | | | |
| 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 | |
| Oceans Below The Software Toolworks Presents ... Oceans Below | MAC | | Original | | 2198620-590001 / I 073100, CDRM1103420 | |
| Oceans Below | 3DO | | Original | | | |
| Oddworld: Abe's Exoddus (Play) | PC | | Original | | 04-15993CD2 | |
| Oddworld: Abe's Exoddus (Disc 1) | PSX | | Original | | SLUS-00710 … | |
| Oddworld: Abe's Exoddus (Disc 2) | PSX | | Original | | SLUS-00731 … | |
| Oddworld: Abe's Oddysee | PSX | | Trade Demo | | | |
| Oddworld: Abe's Oddysee | PSX | | Original | | SLUS-00190 | |
| Oddworld: Abe's Origins | PC | | Limited Run Games | | | |
| Oddworld: Munch's Oddysee | XBOX | | Platinum Hits | | MS-001 | |
| Oddworld: Stranger's Wrath | XBOX | | Original | | EA-109 | |
| Odell Down Under | PC | | Original, SoftKey | | POD544AE-CD | |
| Odium ōdi·um | PC | | Original | | CD-W58-1104-0 | |
| ODS Robot Challenge | PC | | Original | | | |
| 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-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 | |
| 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: Special Edition Preview PC CD-ROM | PC | | | | | |
| Official U.S. PlayStation Magazine Demo Disc 18 | PSX | | | | SCUS-94280 | |
| Official U.S. PlayStation Magazine Demo Disc 20 | PSX | | | | SCUS-94282 | |
| Official U.S. PlayStation Magazine Demo Disc 29 | PSX | | | | SCUS-94437 | |
| Official U.S. PlayStation Magazine Demo Disc 36 | PSX | | | | SCUS-94599 | |
| Official U.S. PlayStation Magazine Demo Disc 54 | PSX | | | | SCUS-94664 | |
| Official Xbox Magazine Best of Xbox Game Demos Vol. 1 | XBOX | | Original | | IM-026 | |
| Official Xbox Magazine Game Disc 02 | XBOX | | Original | | IM-001 | |
| Official Xbox Magazine Game Disc 03 | XBOX | | Original | | IM-002 | |
| Official Xbox Magazine Game Disc 04 | XBOX | | Original | | IM-003 | |
| Official Xbox Magazine Game Disc 05 | XBOX | | Original | | IM-004 | |
| Official Xbox Magazine Game Disc 06 | XBOX | | Original | | IM-005 | |
| Official Xbox Magazine Game Disc 07 | XBOX | | | | IM-006 | |
| Official Xbox Magazine Game Disc 08 | XBOX | | Original | | IM-007 | |
| Official Xbox Magazine Game Disc 09 | XBOX | | Original | | IM-008 | |
| Official Xbox Magazine Game Disc 10 | XBOX | | | | IM-009 | |
| Official Xbox Magazine Game Disc 100 | XBOX360 | | | | IM-2117 | |
| Official Xbox Magazine Game Disc 101 | XBOX360 | | | | IM-2118 | |
| Official Xbox Magazine Game Disc 102 | XBOX360 | | | | IM-2119 | |
| Official Xbox Magazine Game Disc 103 | XBOX360 | | | | IM-2120 | |
| Official Xbox Magazine Game Disc 104 | XBOX360 | | | | IM-2121 | |
| Official Xbox Magazine Game Disc 105 | XBOX360 | | | | IM-2122 | |
| Official Xbox Magazine Game Disc 106 | XBOX360 | | | | IM-2123 | |
| Official Xbox Magazine Game Disc 107 | XBOX360 | | | | IM-2143 | |
| Official Xbox Magazine Game Disc 108 | XBOX360 | | | | IM-2144 | |
| Official Xbox Magazine Game Disc 109 | XBOX360 | | | | IM-2145 | |
| Official Xbox Magazine Game Disc 11 | XBOX | | Original | | IM-010 | |
| Official Xbox Magazine Game Disc 110 | XBOX360 | | | | IM-2146 | |
| Official Xbox Magazine Game Disc 111 | XBOX360 | | | | IM-2147 | |
| Official Xbox Magazine Game Disc 112 | XBOX360 | | | | IM-2148 | |
| Official Xbox Magazine Game Disc 113 | XBOX360 | | | | IM-2149 | |
| Official Xbox Magazine Game Disc 114 | XBOX360 | | | | IM-2150 | |
| Official Xbox Magazine Game Disc 115 | XBOX360 | | | | IM-2151 | |
| Official Xbox Magazine Game Disc 116 | XBOX360 | | | | IM-2152 | |
| Official Xbox Magazine Game Disc 117 | XBOX360 | | | | IM-2153 | |
| Official Xbox Magazine Game Disc 118 | XBOX360 | | | | IM-2155 | |
| Official Xbox Magazine Game Disc 119 | XBOX360 | | | | IM-2156 | |
| Official Xbox Magazine Game Disc 12 | XBOX | | | | IM-011 | |
| Official Xbox Magazine Game Disc 120 | XBOX360 | | | | IM-2157 | |
| Official Xbox Magazine Game Disc 121 | XBOX360 | | | | IM-2158 | |
| Official Xbox Magazine Game Disc 122 | XBOX360 | | | | IM-2159 | |
| Official Xbox Magazine Game Disc 123 | XBOX360 | | | | IM-2160 | |
| Official Xbox Magazine Game Disc 124 | XBOX360 | | | | IM-2161 | |
| Official Xbox Magazine Game Disc 125 | XBOX360 | | | | IM-2106 | |
| Official Xbox Magazine Game Disc 126 | XBOX360 | | | | IM-2107 | |
| Official Xbox Magazine Game Disc 127 | XBOX360 | | | | IM-2108 | |
| Official Xbox Magazine Game Disc 128 | XBOX360 | | | | IM-2109 | |
| Official Xbox Magazine Game Disc 129 | XBOX360 | | | | IM-2115 | |
| Official Xbox Magazine Game Disc 13 | XBOX | | Original | | IM-012 | |
| Official Xbox Magazine Game Disc 130 | XBOX360 | | | | IM-2116 | |
| Official Xbox Magazine Game Disc 131 | XBOX360 | | | | IM-2117 | |
| Official Xbox Magazine Game Disc 14 | XBOX | | Original | | IM-013 | |
| Official Xbox Magazine Game Disc 15 | XBOX | | | | IM-014 | |
| Official Xbox Magazine Game Disc 16 | XBOX | | Original | | IM-015 | |
| Official Xbox Magazine Game Disc 17 | XBOX | | Original | | IM-016 | |
| Official Xbox Magazine Game Disc 18 | XBOX | | Original | | IM-017 | |
| Official Xbox Magazine Game Disc 19 | XBOX | | Original | | IM-018 | |
| Official Xbox Magazine Game Disc 20 | XBOX | | Original | | IM-019 | |
| Official Xbox Magazine Game Disc 21 | XBOX | | Original | | IM-020 | |
| Official Xbox Magazine Game Disc 22 | XBOX | | Original | | IM-021 | |
| Official Xbox Magazine Game Disc 23 | XBOX | | | | IM-022 | |
| Official Xbox Magazine Game Disc 24 | XBOX | | Original | | IM-023 | |
| Official Xbox Magazine Game Disc 25 | XBOX | | Original | | IM-024 | |
| Official Xbox Magazine Game Disc 26 | XBOX | | Original | | IM-025 | |
| Official Xbox Magazine Game Disc 27 | XBOX | | Original | | IM-027 | |
| Official Xbox Magazine Game Disc 28 | XBOX | | Original | | IM-028 | |
| Official Xbox Magazine Game Disc 29 | XBOX | | Original | | IM-029 | |
| Official Xbox Magazine Game Disc 30 | XBOX | | Original | | IM-030 | |
| Official Xbox Magazine Game Disc 31 | XBOX | | Original | | IM-031 | |
| Official Xbox Magazine Game Disc 32 | XBOX | | Original | | IM-032 | |
| Official Xbox Magazine Game Disc 33 | XBOX | | Original | | IM-033 | |
| Official Xbox Magazine Game Disc 34 | XBOX | | Original | | IM-034 | |
| Official Xbox Magazine Game Disc 35 | XBOX | | Original | | IM-035 | |
| Official Xbox Magazine Game Disc 36 | XBOX | | Original | | IM-036 | |
| Official Xbox Magazine Game Disc 37 | XBOX | | Original | | IM-037 | |
| Official Xbox Magazine Game Disc 38 | XBOX | | Original | | IM-038 | |
| Official Xbox Magazine Game Disc 39 | XBOX | | Original | | IM-039 | |
| Official Xbox Magazine Game Disc 40 | XBOX | | Original | | IM-067 | |
| Official Xbox Magazine Game Disc 41 | XBOX | | Original | | IM-068 | |
| Official Xbox Magazine Game Disc 42 | XBOX | | Original | | IM-069 | |
| Official Xbox Magazine Game Disc 43 | XBOX | | Original | | IM-070 | |
| Official Xbox Magazine Game Disc 44 | XBOX | | Original | | IM-071 | |
| Official Xbox Magazine Game Disc 45 | XBOX | | Original | | IM-074 | |
| Official Xbox Magazine Game Disc 46 | XBOX | | Original | | IM-075 | |
| Official Xbox Magazine Game Disc 47 | XBOX | | Original | | IM-076 | |
| Official Xbox Magazine Game Disc 48 | XBOX | | Original | | IM-077 | |
| Official Xbox Magazine Game Disc 49 | XBOX | | Original | | IM-078 | |
| Official Xbox Magazine Game Disc 50 | XBOX | | Original | | IM-080 | |
| Official Xbox Magazine Game Disc 51 | XBOX | | Original | | IM-081 | |
| Official Xbox Magazine Game Disc 52 | XBOX | | Original | | IM-082 | |
| Official Xbox Magazine Game Disc 53 | XBOX | | Original | | IM-204 | |
| Official Xbox Magazine Game Disc 54 | XBOX | | Original | | IM-208 | |
| Official Xbox Magazine Game Disc 54e | XBOX360 | | | | SQ-2002 | |
| Official Xbox Magazine Game Disc 55 | XBOX | | | | IM-209 | |
| Official Xbox Magazine Game Disc 56 | XBOX | | Original | | IM-213 | |
| Official Xbox Magazine Game Disc 57 | XBOX | | Original | | IM-215 | |
| Official Xbox Magazine Game Disc 58 | XBOX | | Original | | IM-216 | |
| Official Xbox Magazine Game Disc 59 | XBOX | | Original | | IM-218 | |
| Official Xbox Magazine Game Disc 60 | XBOX360 | | | | IM-2013 | |
| Official Xbox Magazine Game Disc 61 | XBOX | | Original | | IM-220 | |
| Official Xbox Magazine Game Disc 62 | XBOX | | Original | | IM-221 | |
| Official Xbox Magazine Game Disc 63 | XBOX | | | | IM-222 | |
| Official Xbox Magazine Game Disc 64 | XBOX | | | | IM-223 | |
| Official Xbox Magazine Game Disc 65 | XBOX360 | | | | IM-2027 | |
| Official Xbox Magazine Game Disc 66 | XBOX360 | | | | IM-2032 | |
| Official Xbox Magazine Game Disc 67 | XBOX360 | | | | IM-2033 | |
| Official Xbox Magazine Game Disc 68 | XBOX360 | | | | IM-2034 | |
| Official Xbox Magazine Game Disc 69 | XBOX360 | | | | IM-2035 | |
| Official Xbox Magazine Game Disc 70 | XBOX360 | | | | IM-2036 | |
| Official Xbox Magazine Game Disc 71 | XBOX360 | | | | IM-2037 | |
| Official Xbox Magazine Game Disc 72 | XBOX360 | | | | IM-2048 | |
| Official Xbox Magazine Game Disc 73 | XBOX360 | | | | IM-2052 | |
| Official Xbox Magazine Game Disc 74 | XBOX360 | | | | IM-2054 | |
| Official Xbox Magazine Game Disc 75 | XBOX360 | | | | IM-2051 | |
| Official Xbox Magazine Game Disc 76 | XBOX360 | | | | IM-2053 | |
| Official Xbox Magazine Game Disc 77 | XBOX360 | | | | IM-2055 | |
| Official Xbox Magazine Game Disc 78 | XBOX360 | | | | IM-2056 | |
| Official Xbox Magazine Game Disc 79 | XBOX360 | | | | IM-2060 | |
| Official Xbox Magazine Game Disc 80 | XBOX360 | | | | IM-2061 | |
| Official Xbox Magazine Game Disc 81 | XBOX360 | | | | IM-2072 | |
| Official Xbox Magazine Game Disc 82 | XBOX360 | | | | IM-2073 | |
| Official Xbox Magazine Game Disc 83 | XBOX360 | | | | IM-2074 | |
| Official Xbox Magazine Game Disc 84 | XBOX360 | | | | IM-2075 | |
| Official Xbox Magazine Game Disc 85 | XBOX360 | | | | IM-2076 | |
| Official Xbox Magazine Game Disc 86 | XBOX360 | | | | IM-2078 | |
| Official Xbox Magazine Game Disc 87 | XBOX360 | | | | IM-2079 | |
| Official Xbox Magazine Game Disc 88 | XBOX360 | | | | IM-2080 | |
| Official Xbox Magazine Game Disc 89 | XBOX360 | | | | IM-2081 | |
| Official Xbox Magazine Game Disc 90 | XBOX360 | | | | IM-2082 | |
| Official Xbox Magazine Game Disc 91 | XBOX360 | | | | IM-2083 | |
| Official Xbox Magazine Game Disc 92 | XBOX360 | | | | IM-2084 | |
| Official Xbox Magazine Game Disc 93 | XBOX360 | | | | IM-2107 | |
| Official Xbox Magazine Game Disc 94 | XBOX360 | | | | IM-2110 | |
| Official Xbox Magazine Game Disc 95 | XBOX360 | | | | IM-2112 | |
| Official Xbox Magazine Game Disc 96 | XBOX360 | | | | IM-2113 | |
| Official Xbox Magazine Game Disc 97 | XBOX360 | | | | IM-2114 | |
| Official Xbox Magazine Game Disc 98 | XBOX360 | | | | IM-2115 | |
| Official Xbox Magazine Game Disc 99 | XBOX360 | | | | IM-2116 | |
| Ohio Distinctive Software Vol. I | PC | | | | | |
| Ōkami | WII | | Beta | | | |
| Old El Paso Recipes for Family Fun | PC | | Original | | | |
| Omar Sharif on Bridge | PC | | Valueware | | CD-ICD-148-0 | |
| One Must Fall 2097 | PC | | Original | | EPOMF01 | |
| Oni / 4x4 Evo Oni / 4x4 Evolution | PC | | Demo | | 12DC1-09GM03-11 | |
| OnSide Soccer | 3DO | | Unlicensed (oldergames, Good Deal Games Double Header! Two Game Set) | | | |
| Onslaught | WII | | Beta | | | |
| Open Season | XBOX | | Original | | US-097 | |
| Open Season | XBOX360 | | Original, ESA Foundation Holiday Bundle | | US-2024 | |
| Operation | PC | | General Mills | | AM801R5 | |
| Operation Body Count: One Level Preview | PC | | Original | | | |
| Operation Darkness | XBOX360 | | Original | | AT-2002 | |
| Operation Flashpoint: Cold War Crisis | PC | | Playable Demo | | POPFCDUS40 | |
| The Operational Art of War: Century of Warfare | PC | | Original | | | |
| 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 | |
| Opoona | WII | | Original | | RVL-RPOE-USA | |
| Opsys | PC | | Original | | | |
| OptImage CD-I 220 Adjustment Disc | CDI | | 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 2) | PC | | Original | | 985217 | |
| Orbatak | 3DO | | Arcade CD-ROM | | | |
| Order Up! | WII | | Beta | | | |
| 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: Classic Edition | PC | | SoftKey | | POT144EE-CD | |
| The Oregon Trail: Classic Edition | PC | | SoftKey | | POT144BE-CD | |
| The Original Mulan 花木兰 | PC | | 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 | | | |
| Orly's Draw-A-Story | PC | | Original | | | |
| Oro Negro: Juego de Guerra y Estrategia | PC | | Covermount | | | |
| Otogi 2: Immortal Warriors | XBOX | | Original | | FS-004 | |
| Otogi: Myth of Demons | XBOX | | Original | | FS-002 | |
| Otomedius Excellent | XBOX360 | | Original | | KN-2106 | |
| Our House featuring The Family Circus | VIS | | Original | | 25-6146 | |
| Ouro e Glória: O Caminho para El Dorado | PC | | Original | | 906.02.0 | |
| Out of This World | 3DO | | Original | | | |
| Outburst | PC | | Classic Value Series | | Product# 99043 | |
| Outlast: A Reading for Information Game | PC | | Original | | HH824 | |
| Outlaw Golf | XBOX | | Original | | VU-016 | |
| Outlaw Golf 2 | XBOX | | Original | | TT-023 | |
| Outlaw Golf: 9 Holes of X-Mas | XBOX | | Original | | VU-027 | |
| Outlaw Golf: 9 More Holes of X-Mas | XBOX | | Original | | SS-006 | |
| Outlaw Golf: Holiday Golf | XBOX | | Original | | SS-005 | |
| Outlaw Tennis | XBOX | | Original | | TT-118 | |
| Outlaw Volleyball | XBOX | | Original | | SS-003 | |
| Outlaw Volleyball: Red Hot | XBOX | | Original | | SS-003 | |
| Outpost | PC | | Original | | S725430 | |
| OutRun 2 | XBOX | | Original | | SE-054 | |
| 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 | | | |
| OverBlood | PSX | | Original | | SLUS-00464 | |
| Overlord II | PC | | Preview Code | | | |
| Overwatch | PC | | Game of the Year Edition, Legendary Edition | | 73052010US, S7302210 | |
| Oz: The Magical Adventure | PC | | Original | | | |
| Ozzie's World | PC | | Original | | | |
| Owlboy (Game Disc) | PC | 0.0.6152.604 | IndieBox | | | |
| Official Sega Dreamcast Magazine Vol. 11: February 2001 | DC | 0.500 | | | | |
| Oddworld: Abe's Oddysee: New 'n' Tasty! | PS3 | 01.00 | Limited Edition | | BLUS-31621 | |
| Oddworld: Stranger's Wrath HD | PS3 | 01.00 | Original | | BLUS-31620 | |
| Odin Sphere: Leifthrasir | PS3 | 01.01 | Original | | BLUS-31601 | |
| The Oregon Trail 4th Edition (Disc 1) | PC | 1 | Original | | OTF744AE-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 3) | PC | 1 | Original | | OTF744AE-CD3 | |
| ObsCure (Disc 1) | PC | 1.0 | Original | | PCO457CD | |
| ObsCure (Disc 2) | PC | 1.0 | Original | | PCO457CD | |
| ObsCure (Disc 3) | PC | 1.0 | Original | | PCO457CD | |
| ObsCure (Disc 4) | PC | 1.0 | Original | | PCO457CD | |
| ObsCure (Disc 5) | PC | 1.0 | Original | | PCO457CD | |
| Obsidian | PC | 1.0 | Demo | | | |
| Omar Sharif Bridge | PC | 1.0 | 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 | | | |
| Opening Night | PC | 1.0 | Original | | #HCD646A | |
| Opening Night: Behind The Scenes | PC | 1.0 | Original | | #HCD646B | |
| The Operative: No One Lives Forever (Disc 1) | PC | 1.0 | Original | | | |
| The Operative: No One Lives Forever (Disc 2) | PC | 1.0 | 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 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 | |
| Oregon Trail II | PC | 1.0 | Original | | | |
| 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 2) | PC | 1.0 Build 3 | Original | | 9511831 | |
| Outlaws (Disc 2) | PC | 1.0 Build 3 | Bundle Version Diamond OEM | | 644431 | |
| ObsCure | PS2 | 1.00 | Original | | SLUS 20777 | |
| ObsCure: The Aftermath | PSP | 1.00 | Original, Test Sample | | ULUS-10484 | |
| ObsCure: The Aftermath | PS2 | 1.00 | Original | | SLUS-21709 | |
| Odin Sphere | PS2 | 1.00 | Trade Demo | | SLUS-28065 | |
| Odin Sphere | PS2 | 1.00 | Original, Greatest Hits | | SLUS 21577 … | |
| Official U.S. PlayStation Magazine Demo Disc 100 | PS2 | 1.00 | | | SCUS 97452 | |
| Official U.S. PlayStation Magazine Demo Disc 101 | PS2 | 1.00 | | | SCUS 97453 | |
| Official U.S. PlayStation Magazine Demo Disc 103 | PS2 | 1.00 | | | SCUS 97531 | |
| Official U.S. PlayStation Magazine Demo Disc 104 | PS2 | 1.00 | | | SCUS 97532 | |
| Official U.S. PlayStation Magazine Demo Disc 105 | PS2 | 1.00 | | | SCUS 97533 | |
| Official U.S. PlayStation Magazine Demo Disc 106 | PS2 | 1.00 | | | SCUS 97534 | |
| Official U.S. PlayStation Magazine Demo Disc 108 | PS2 | 1.00 | | | SCUS 97536 | |
| Official U.S. PlayStation Magazine Demo Disc 110 | PS2 | 1.00 | | | SCUS 97538 | |
| Official U.S. PlayStation Magazine Demo Disc 111 | PS2 | 1.00 | | | SCUS 97539 | |
| Official U.S. PlayStation Magazine Demo Disc 112 | PS2 | 1.00 | | | SCUS 97540 | |
| Official U.S. PlayStation Magazine Demo Disc 49 | PS2 | 1.00 | | | SCUS 97158 | |
| Official U.S. PlayStation Magazine Demo Disc 51 | PS2 | 1.00 | | | SCUS 97165 | |
| Official U.S. PlayStation Magazine Demo Disc 53 | PS2 | 1.00 | | | SCUS 97176 | |
| Official U.S. PlayStation Magazine Demo Disc 55 | PS2 | 1.00 | | | SCUS 97181 | |
| Official U.S. PlayStation Magazine Demo Disc 56 | PS2 | 1.00 | | | SCUS 97182 | |
| Official U.S. PlayStation Magazine Demo Disc 57 | PS2 | 1.00 | | | SCUS 97183 | |
| Official U.S. PlayStation Magazine Demo Disc 58 | PS2 | 1.00 | | | SCUS 97184 | |
| Official U.S. PlayStation Magazine Demo Disc 59 | PS2 | 1.00 | | | SCUS 97185 | |
| Official U.S. PlayStation Magazine Demo Disc 60 | PS2 | 1.00 | | | SCUS 97186 | |
| Official U.S. PlayStation Magazine Demo Disc 61 | PS2 | 1.00 | | | SCUS 97187 | |
| Official U.S. PlayStation Magazine Demo Disc 62 | PS2 | 1.00 | | | SCUS 97188 | |
| Official U.S. PlayStation Magazine Demo Disc 63 | PS2 | 1.00 | | | SCUS 97189 | |
| Official U.S. PlayStation Magazine Demo Disc 64 | PS2 | 1.00 | | | SCUS 97190 | |
| Official U.S. PlayStation Magazine Demo Disc 65 | PS2 | 1.00 | | | SCUS 97191 | |
| Official U.S. PlayStation Magazine Demo Disc 66 | PS2 | 1.00 | | | SCUS 97241 | |
| Official U.S. PlayStation Magazine Demo Disc 67 | PS2 | 1.00 | | | SCUS 97242 | |
| Official U.S. PlayStation Magazine Demo Disc 68 | PS2 | 1.00 | | | SCUS 97243 | |
| Official U.S. PlayStation Magazine Demo Disc 69 | PS2 | 1.00 | | | SCUS 97244 | |
| Official U.S. PlayStation Magazine Demo Disc 70 | PS2 | 1.00 | | | SCUS 97245 | |
| Official U.S. PlayStation Magazine Demo Disc 72 | PS2 | 1.00 | | | SCUS 97247 | |
| Official U.S. PlayStation Magazine Demo Disc 73 | PS2 | 1.00 | | | SCUS 97248 | |
| Official U.S. PlayStation Magazine Demo Disc 74 | PS2 | 1.00 | | | SCUS 97249 | |
| Official U.S. PlayStation Magazine Demo Disc 75 | PS2 | 1.00 | | | SCUS 97250 | |
| Official U.S. PlayStation Magazine Demo Disc 77 | PS2 | 1.00 | | | SCUS 97252 | |
| Official U.S. PlayStation Magazine Demo Disc 79 | PS2 | 1.00 | | | SCUS 97332 | |
| Official U.S. PlayStation Magazine Demo Disc 80 | PS2 | 1.00 | | | SCUS 97333 | |
| Official U.S. PlayStation Magazine Demo Disc 81 | PS2 | 1.00 | | | SCUS 97334 | |
| Official U.S. PlayStation Magazine Demo Disc 82 | PS2 | 1.00 | | | SCUS 97335 | |
| Official U.S. PlayStation Magazine Demo Disc 83 | PS2 | 1.00 | | | SCUS 97336 | |
| Official U.S. PlayStation Magazine Demo Disc 84 | PS2 | 1.00 | | | SCUS 97337 | |
| Official U.S. PlayStation Magazine Demo Disc 85 | PS2 | 1.00 | | | SCUS 97338 | |
| Official U.S. PlayStation Magazine Demo Disc 86 | PS2 | 1.00 | | | SCUS 97339 | |
| Official U.S. PlayStation Magazine Demo Disc 89 | PS2 | 1.00 | | | SCUS 97342 | |
| Official U.S. PlayStation Magazine Demo Disc 90 | PS2 | 1.00 | | | SCUS 97442 | |
| Official U.S. PlayStation Magazine Demo Disc 91 | PS2 | 1.00 | | | SCUS 97443 | |
| Official U.S. PlayStation Magazine Demo Disc 92 | PS2 | 1.00 | | | SCUS 97444 | |
| Official U.S. PlayStation Magazine Demo Disc 94 | PS2 | 1.00 | | | SCUS 97446 | |
| Official U.S. PlayStation Magazine Demo Disc 95 | PS2 | 1.00 | | | SCUS 97447 | |
| Official U.S. PlayStation Magazine Demo Disc 96 | PS2 | 1.00 | | | SCUS 97448 | |
| Official U.S. PlayStation Magazine Demo Disc 97 | PS2 | 1.00 | | | SCUS 97449 | |
| Official U.S. PlayStation Magazine Demo Disc 99 | PS2 | 1.00 | | | SCUS 97451 | |
| Onimusha: Warlords | PS2 | 1.00 | Original, Greatest Hits | | SLUS-20018 … | |
| Online Start-Up Disc v1.0 Disco de Inicio en Línea v1.0 | PS2 | 1.00 | Original | | PBPX 95250 … | |
| Online Start-Up Disc v3.5: Broadband Only | PS2 | 1.00 | Original | | PBPX-95246 | |
| Orphen: Scion of Sorcery | PS2 | 1.00 | Original | | SLUS-20011 | |
| Ooga Booga | DC | 1.001 | Original | | 51140 | |
| The Operative: No One Lives Forever (Disc 1) | PC | 1.004 | Game of the Year Edition | | | |
| Official U.S. PlayStation Magazine Demo Disc 71 | PS2 | 1.01 | | | SCUS 97246 | |
| Official U.S. PlayStation Magazine Demo Disc 87 | PS2 | 1.01 | | | SCUS 97340 | |
| Official U.S. PlayStation Magazine Demo Disc 88 | PS2 | 1.01 | | | SCUS 97341 | |
| Official U.S. PlayStation Magazine Demo Disc 93 | PS2 | 1.01 | | | SCUS 97445 | |
| Official U.S. PlayStation Magazine Demo Disc 98 | PS2 | 1.01 | | | SCUS 97450 | |
| Oil Tycoon | PC | 1.01 | Original | | | |
| Okage: Shadow King | PS2 | 1.01 | Original | | SCUS 97129 | |
| Ōkami | PS2 | 1.01 | Original, Greatest Hits | | SLUS 21115 … | |
| Online Start-Up Disc v3.0 | PS2 | 1.01 | | | PBPX-95242 | |
| Online Start-Up Disc v3.0 | PS2 | 1.01 | | | SCUS 97425 | |
| Open Season | PS2 | 1.01 | Original | | SLUS 21467 | |
| The Orion Conspiracy | PC | 1.01 | Original | | | |
| Outlaw Tennis | PS2 | 1.01 | Original | | SLUS 21190 | |
| OutRun 2006: Coast 2 Coast | PS2 | 1.01 | Original | | SLUS 21274 | |
| Official Sega Dreamcast Magazine Vol. 5: May 2000 | DC | 1.010 | | | | |
| The Oregon Trail 5th Edition: Adventures Along the Oregon Trail | PC | 1.01E | Enhanced Education Version | | 480599-CD | |
| Official U.S. PlayStation Magazine Demo Disc 107 | PS2 | 1.02 | | | SCUS 97535 | |
| Onimusha: Dawn of Dreams (Disc 1) | PS2 | 1.02 | Original | | SLUS-21180 | |
| Onimusha: Dawn of Dreams (Disc 2) | PS2 | 1.02 | Original | | SLUS-21362 | |
| Online Start-Up Disc 4.0: Broadband Only | PS2 | 1.02 | Bundled with PS2 | | PBPX 95248 … | |
| Online Start-Up Disc v3.0 | PS2 | 1.02 | Original | | PBPX-95239 | |
| Outlaw Golf 2 | PS2 | 1.02 | Original | | SLUS 21030 | |
| Outlaw Volleyball Remixed | PS2 | 1.02 | Original | | SLUS 21049 | |
| 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 | 1.1 | Rerelease, Southwestern School Set | | 380859B-CD | |
| The Oregon Trail | PC | 1.1 | Original | | #HCD606 | |
| The Oregon Trail 3rd Edition: Pioneer Adventures (Disc 1) | PC | 1.2 | Rerelease | | OTA744BE-CD1 | |
| The Oregon Trail 3rd Edition: Pioneer Adventures (Disc 2) | PC | 1.2 | Original | | OTA744BE-CD2 | |
| The Oregon Trail 3rd Edition: Pioneer Adventures (Disc 3) | PC | 1.2 | Original | | OTA744BE-CD3 | |
| The Oregon Trail | PC | 1.2 | Original | | #HCD706 | |
| The Oregon Trail | PC | 1.2 | Original | | #HCD706 | |
| Outpost 2: Divided Destiny | PC | 1.2.0.5 | Original | | | |
| Operation Neptune | PC | 1.22 | Original | | ONT744CE-CD | |
| The Oregon Trail | PC | 1.22 | Smart Saver | | ORT844AE-CD | |
| Operation Neptune | PC | 1.23 | The ClueFinders: Math Ages 9-12 | | ONT744EE-CD | |
| The Oregon Trail 3rd Edition: Pioneer Adventures (Disc 1) | PC | 1.2a | Bundle Version Compaq Presario OEM | | | |
| Oregon Trail II | PC | 1.3 | Smart Saver | | 0TT744AE-CD | |
| Oregon Trail II | PC | 1.3 | Smart Saver | | 381032-CD/i401ha | |
| Oregon Trail II: 25th Anniversary Limited Edition | PC | 1.3 | Original, SoftKey | | #OTR744AE-CD | |
| Oregon Trail II | PC | 1.31 | Rerelease | | HCD744BE-CD | |
| Oregon Trail II | PC | 1.31 | Rerelease | | #HCD744AE-CD | |
| Oregon Trail II | PC | 1.32 | Rerelease | | #HCD744CE-CD | |
| Obduction | PC | 1.4.2 | Kickstarter | | | |
| The Operative: No One Lives Forever | PS2 | 1.50 | Original | | SLUS 20028 | |
| Operation Flashpoint: Resistance | PC | 1.75 | Original | | MOFRCDUS00 | |
| Oddworld: Abe's Exoddus (Install) | PC | 2.0 | Original | | 04-15993CD1 | |
| Oddworld: Abe's Oddysee | PC | 2.0 | Channelware | | 04-15303 | |
| Oddworld: Abe's Oddysee | PC | 2.0 | Original | | 04-12608CD | |
| Outlaws (Disc 1) | PC | 2.0 | Rerelease | | 9511830 | |
| Outlaws (Disc 1) | PC | 2.0 | Rerelease | | 9511830 | |
| Outlaws (Disc 2) | PC | 2.0 | Rerelease | | 9511831 | |
| Outlaws (Disc 2) | PC | 2.0 | Rerelease | | 9511831 | |
| Outlaws: Cidade Sem Lei (Disc 1) | PC | 2.0 | Original | | 0806.05.0 | |
| Official U.S. PlayStation Magazine Demo Disc 76 | PS2 | 2.01 | | | SCUS 97251 | |
| Oscar Wilde's The Selfish Giant | PC | 2.10 | Original | | MQ 13-004-144 | |
| The Oregon Trail: Classic Edition | PC | 3.0.1 | SoftKey | | POT144CE-CD | |
| ODS Robot Challenge | PC | 5.0.1r26 | Teacher's Edition | | | |
| 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 | | | |
| Ori and the Blind Forest: Definitive Edition | PC | 5.3.2.9582331 | Limited Edition | | | |
| Outlaws (Demonstration Program) | PC | Demo 1.0 CD Build 3 | Demo | | 644230 | |
| OnHand Chess / Sega Swirl Lite | PALM | PDA103-01 | Original | | PDA103-01 | |
| OnHand Sports Games / Sega Swirl Lite | PALM | PDA105-01 | OnHand Double Pack (Sports Games/Astrologer) | | PDA105-01 | |
| OnHand Complete Astrologer OnHand Complete Astrologer: Horoscopes & More! | PALM | PDA108-01 | OnHand Double Pack (Sports Games/Astrologer) | | PDA108-01 | |
| Out of This World | 3DO | RE | 3DO Maniac Pack | | | |
| Oddworld: Abe's Oddysee | PSX | Rev 1 | Original, Greatest Hits | | SLUS-00190 | |
| Once Upon a Time | WII | Rev 1 | Original | | RVL-SUTE-USA-B0 | |
| Oddworld: Abe's Oddysee | PSX | Rev 2 | Greatest Hits | | SLUS-00190 | |
| 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 | |