Region | Title | System | Version | Edition | Languages | Serial | Status |
| Oz: The Magical Adventure | PC | 7.0.0.198 | Rerelease | | 92785 | |
| Owlboy (Game Disc) | PC | 0.0.6152.604 | IndieBox | | | |
| Overlord: Dark Legend | WII | | Original | | RVL-ROAE-USA | |
| Overlord II | PC | 1.0 | Original | | MOVL2CDUS00 | |
| Overlord II | PC | | Preview Code | | | |
| Overlord | PC | 1.0 | Original | | MOVL1CDFC00 | |
| Outtrigger | DC | 1.003 | Original | | 51102 | |
| OutRun 2006: Coast 2 Coast | PSP | 1.03 | Original | | ULUS-10064 | |
| OutRun 2 | XBOX | | Original | | SE-054 | |
| Outlaw Volleyball: Red Hot | XBOX | | Original | | SS-003 | |
| Outlaw Volleyball | XBOX | | Original | | SS-003 | |
| Outlaw Tennis | XBOX | | Original | | TT-118 | |
| Outlaw Golf: 9 More Holes of X-Mas | XBOX | | Original | | SS-006 | |
| Outlaw Golf: 9 Holes of X-Mas | XBOX | | Original | | VU-027 | |
| Outlaw Golf 2 | XBOX | | Original | | TT-023 | |
| Outlaw Golf | XBOX | | Original | | VU-016 | |
| Outdoor Action Double Pack Outdoor Action Double Pack: Remington Great American Bird Hunt and Shimano Xtreme Fishing | WII | | Original | | RVL-SFHE-USA-B0 | |
| Our House: Party! | WII | | Original | | RVL-SHPE-USA-B0 | |
| Otomedius Excellent | XBOX360 | | Original | | KN-2106 | |
| Otogi 2: Immortal Warriors | XBOX | | Original | | FS-004 | |
| The Oregon Trail 4th Edition (Disc 3) | PC | 1 | Original | | OTF744AE-CD3 | |
| The Oregon Trail 4th Edition (Disc 2) | PC | 1 | Original | | OTF744AE-CD2 | |
| The Oregon Trail 4th Edition (Disc 1) | PC | 1 | Original | | OTF744AE-CD1 | |
| The Oregon Trail 3rd Edition: Pioneer Adventures (Disc 3) | PC | | Original | | OTA744AE-CD3 | |
| The Oregon Trail 3rd Edition: Pioneer Adventures | PC | 1.0 | DVD-ROM | | ORG811AE-DVD | |
| Order Up!! | PS3 | 01.02 | Original | | BLUS-30904 | |
| Order Up! | WII | Rev 1 | Original | | RVL-ROXE-USA | |
| Order Up! | WII | | Original | | RVL-ROXE-USA | |
| Order Up! | WII | | Beta | | | |
| Operation Flashpoint: Red River | PC | | Original | | MOFP3CDUS00 | |
| Operation Darkness | XBOX360 | | Original | | AT-2002 | |
| Open Season | WII | | Original | | RVL-ROPE-USA | |
| Open Season | GC | | Original | | DL-DOL-GOSE-USA | |
| Open Season | XBOX | | Original | | US-097 | |
| Oops! Prank Party | WII | Rev 1 | Original | | RVL-SPIE-USA-B0 | |
| Oops! Prank Party | WII | | Demo | | RVL-DPIE-USA-B0 | |
| Ooga Booga | DC | 1.001 | Original | | 51140 | |
| Onslaught | WII | | Beta | | | |
| Online Chess Kingdoms | PSP | 1.02 | Original | | ULUS 10179 | |
| Onechanbara: Bikini Zombie Slayers | WII | | Original | | RVL-RONE-USA | |
| Once Upon a Time | WII | Rev 1 | Original | | RVL-SUTE-USA-B0 | |
| Ōkami | WII | | Beta | | | |
| Offroad Extreme! Special Edition | WII | | Original | | RVL-ROFE-USA-B0 | |
| Official Xbox Magazine Game Disc 99 | XBOX360 | | | | IM-2116 | |
| Official Xbox Magazine Game Disc 98 | XBOX360 | | | | IM-2115 | |
| Official Xbox Magazine Game Disc 97 | XBOX360 | | | | IM-2114 | |
| Official Xbox Magazine Game Disc 96 | XBOX360 | | | | IM-2113 | |
| Official Xbox Magazine Game Disc 95 | XBOX360 | | | | IM-2112 | |
| Official Xbox Magazine Game Disc 94 | XBOX360 | | | | IM-2110 | |
| Official Xbox Magazine Game Disc 93 | XBOX360 | | | | IM-2107 | |
| Official Xbox Magazine Game Disc 92 | XBOX360 | | | | IM-2084 | |
| Official Xbox Magazine Game Disc 89 | XBOX360 | | | | IM-2081 | |
| Official Xbox Magazine Game Disc 88 | XBOX360 | | | | IM-2080 | |
| Official Xbox Magazine Game Disc 87 | XBOX360 | | | | IM-2079 | |
| Official Xbox Magazine Game Disc 86 | XBOX360 | | | | IM-2078 | |
| Official Xbox Magazine Game Disc 85 | XBOX360 | | | | IM-2076 | |
| Official Xbox Magazine Game Disc 84 | XBOX360 | | | | IM-2075 | |
| Official Xbox Magazine Game Disc 83 | XBOX360 | | | | IM-2074 | |
| Official Xbox Magazine Game Disc 82 | XBOX360 | | | | IM-2073 | |
| Official Xbox Magazine Game Disc 81 | XBOX360 | | | | IM-2072 | |
| Official Xbox Magazine Game Disc 80 | XBOX360 | | | | IM-2061 | |
| Official Xbox Magazine Game Disc 79 | XBOX360 | | | | IM-2060 | |
| Official Xbox Magazine Game Disc 78 | XBOX360 | | | | IM-2056 | |
| Official Xbox Magazine Game Disc 77 | XBOX360 | | | | IM-2055 | |
| Official Xbox Magazine Game Disc 76 | XBOX360 | | | | IM-2053 | |
| Official Xbox Magazine Game Disc 75 | XBOX360 | | | | IM-2051 | |
| Official Xbox Magazine Game Disc 74 | XBOX360 | | | | IM-2054 | |
| Official Xbox Magazine Game Disc 73 | XBOX360 | | | | IM-2052 | |
| Official Xbox Magazine Game Disc 72 | XBOX360 | | | | IM-2048 | |
| Official Xbox Magazine Game Disc 71 | XBOX360 | | | | IM-2037 | |
| Official Xbox Magazine Game Disc 70 | XBOX360 | | | | IM-2036 | |
| Official Xbox Magazine Game Disc 69 | XBOX360 | | | | IM-2035 | |
| Official Xbox Magazine Game Disc 68 | XBOX360 | | | | IM-2034 | |
| Official Xbox Magazine Game Disc 67 | XBOX360 | | | | IM-2033 | |
| Official Xbox Magazine Game Disc 66 | XBOX360 | | | | IM-2032 | |
| Official Xbox Magazine Game Disc 65 | XBOX360 | | | | IM-2027 | |
| Official Xbox Magazine Game Disc 61 | XBOX | | Original | | IM-220 | |
| Official Xbox Magazine Game Disc 60 | XBOX360 | | | | IM-2013 | |
| Official Xbox Magazine Game Disc 58 | XBOX | | Original | | IM-216 | |
| Official Xbox Magazine Game Disc 49 | XBOX | | Original | | IM-078 | |
| Official Xbox Magazine Game Disc 47 | XBOX | | Original | | IM-076 | |
| Official Xbox Magazine Game Disc 44 | XBOX | | Original | | IM-071 | |
| Official Xbox Magazine Game Disc 131 | XBOX360 | | | | IM-2117 | |
| Official Xbox Magazine Game Disc 130 | XBOX360 | | | | IM-2116 | |
| Official Xbox Magazine Game Disc 129 | XBOX360 | | | | IM-2115 | |
| Official Xbox Magazine Game Disc 128 | XBOX360 | | | | IM-2109 | |
| Official Xbox Magazine Game Disc 127 | XBOX360 | | | | IM-2108 | |
| Official Xbox Magazine Game Disc 126 | XBOX360 | | | | IM-2107 | |
| Official Xbox Magazine Game Disc 125 | XBOX360 | | | | IM-2106 | |
| Official Xbox Magazine Game Disc 124 | XBOX360 | | | | IM-2161 | |
| Official Xbox Magazine Game Disc 123 | XBOX360 | | | | IM-2160 | |
| Official Xbox Magazine Game Disc 122 | XBOX360 | | | | IM-2159 | |
| Official Xbox Magazine Game Disc 121 | XBOX360 | | | | IM-2158 | |
| Official Xbox Magazine Game Disc 120 | XBOX360 | | | | IM-2157 | |
| Official Xbox Magazine Game Disc 119 | XBOX360 | | | | IM-2156 | |
| Official Xbox Magazine Game Disc 118 | XBOX360 | | | | IM-2155 | |
| Official Xbox Magazine Game Disc 117 | XBOX360 | | | | IM-2153 | |
| Official Xbox Magazine Game Disc 116 | XBOX360 | | | | IM-2152 | |
| Official Xbox Magazine Game Disc 115 | XBOX360 | | | | IM-2151 | |
| Official Xbox Magazine Game Disc 114 | XBOX360 | | | | IM-2150 | |
| Official Xbox Magazine Game Disc 113 | XBOX360 | | | | IM-2149 | |
| Official Xbox Magazine Game Disc 112 | XBOX360 | | | | IM-2148 | |
| Official Xbox Magazine Game Disc 111 | XBOX360 | | | | IM-2147 | |
| Official Xbox Magazine Game Disc 110 | XBOX360 | | | | IM-2146 | |
| Official Xbox Magazine Game Disc 109 | XBOX360 | | | | IM-2145 | |
| Official Xbox Magazine Game Disc 108 | XBOX360 | | | | IM-2144 | |
| Official Xbox Magazine Game Disc 107 | XBOX360 | | | | IM-2143 | |
| Official Xbox Magazine Game Disc 106 | XBOX360 | | | | IM-2123 | |
| Official Xbox Magazine Game Disc 105 | XBOX360 | | | | IM-2122 | |
| Official Xbox Magazine Game Disc 104 | XBOX360 | | | | IM-2121 | |
| Official Xbox Magazine Game Disc 103 | XBOX360 | | | | IM-2120 | |
| Official Xbox Magazine Game Disc 102 | XBOX360 | | | | IM-2119 | |
| Official Xbox Magazine Game Disc 101 | XBOX360 | | | | IM-2118 | |
| Official Xbox Magazine Game Disc 100 | XBOX360 | | | | IM-2117 | |
| Official Xbox Magazine Game Disc 03 | XBOX | | Original | | IM-002 | |
| Official Xbox Magazine Game Disc 02 | XBOX | | Original | | IM-001 | |
| Official Xbox Magazine Best of Xbox Game Demos Vol. 1 | XBOX | | Original | | IM-026 | |
| Official Sega Dreamcast Magazine Vol. 9: December 2000 | DC | 1.000 | | | IGN9 | |
| Official Sega Dreamcast Magazine Vol. 5: May 2000 | DC | 1.010 | | | | |
| Official Sega Dreamcast Magazine Vol. 2: November 1999 | DC | 1.020 | | | IGN1 | |
| Official Sega Dreamcast Magazine Vol. 11: February 2001 | DC | 0.500 | | | | |
| Off-Road Redneck Racing | PC | | Original | | CD-C98-1259-0 | |
| Odin Sphere | PS2 | 1.00 | Trade Demo | | SLUS-28065 | |
| Oddworld: Munch's Oddysee | XBOX | | Platinum Hits | | MS-001 | |
| Oddworld: Abe's Origins | PC | | Limited Run Games | | | |
| Octomania | WII | | Original | | RVL-RTKE-USA | |
| Ocean Commander | WII | | Original | | RVL-RQME-USA | |
| Obscure: The Aftermath ObsCure: The Aftermath | PS2 | 1.00 | Original | | SLUS-21709 | |
| Obscure: The Aftermath ObsCure: The Aftermath | WII | | Original | | RVL-ROBE-USA | |
| Obscure: The Aftermath ObsCure: The Aftermath | WII | | Beta | | | |
| Obduction | PC | 1.4.2 | Kickstarter | | | |
| Obduction | MAC | | Kickstarter | | | |