| Sony PlayStation 2 disc |  Official PlayStation 2 Magazine Demo 63 Model SCED-53166 | 2005 | Future Publishing, Ltd. UK |
| Sony PlayStation 2 disc | Official PlayStation 2 Magazine Demo 63 Model SCED-53211 | 2005 | Future Publishing, Ltd. UK |
| Sony PlayStation 2 disc | Official PlayStation 2 Magazine Demo 63 Model SCED-53293 | 2005 | Future Publishing, Ltd. UK |
| Sony PlayStation 2 disc | Official PlayStation 2 Magazine Demo 64 Model SCED-53167 | 2005 | Future Publishing, Ltd. UK |
| Sony PlayStation 2 disc | Official PlayStation 2 Magazine Demo 64 Model SCED-53212 | 2005 | Future Publishing, Ltd. UK |
| Sony PlayStation 2 disc | Official PlayStation 2 Magazine Demo 64 Model SCED-53294 | 2005 | Future Publishing, Ltd. UK |
| Sony PlayStation 2 disc | Official PlayStation 2 Magazine Demo 65 Model SCED-53168 | 2005 | Future Publishing, Ltd. UK |
| Sony PlayStation 2 disc | Official PlayStation 2 Magazine Demo 65 Model SCED-53213 | 2005 | Future Publishing, Ltd. UK |
| Sony PlayStation 2 disc | Official PlayStation 2 Magazine Demo 66 Model SCED-53169 | 2005 | Future Publishing, Ltd. UK |
| Sony PlayStation 2 disc | Official PlayStation 2 Magazine Demo 66 Model SCED-53214 | 2005 | Future Publishing, Ltd. UK |
| Sony PlayStation 2 disc | Official PlayStation 2 Magazine Demo 67 Model SCED-53170 | 2005 | Future Publishing, Ltd. UK |
| Sony PlayStation 2 disc | Official PlayStation 2 Magazine Demo 67 Model SCED-53215 | 2005 | Future Publishing, Ltd. UK |
| Sony PlayStation 2 disc | Official PlayStation 2 Magazine French Christmas Special Demo Model SCED-53854 | 2005 | Future Publishing, Ltd. UK |
| Sony PlayStation 2 disc | Official PlayStation 2 Magazine Germany Special 02-2005 | 2005 | Future Publishing, Ltd. UK |
| Sony PlayStation 2 disc | Official PlayStation 2 Magazine Germany Special 03-2005 | 2005 | Future Publishing, Ltd. UK |
| Sony PlayStation 2 disc | Official PlayStation 2 Magazine Germany Special Edition 01-2005 | 2005 | Future Publishing, Ltd. UK |
| Pachinko |  Oguricap | 2005 | Sansei R&D Japan |
| Nintendo DS cart. | Oideyo Doubutsu no Mori | 2005 | Nintendo Co., Ltd. Japan |
| Pachislot | Okinawa Storm | 2005 | Net Corp. Japan |
| Slot Machine | Old Glory Deluxe | 2005 | Cadillac Jack Duluth, GA, USA |
| Slot Machine | Oliver's Bar | 2005 | AGI Austrian Gaming Industries Novomatic Group |
| Slot Machine | Omega | 2005 | Bally Wulff |
| Nokia N-Gage card | ONE | 2005 | Nokia |
| Medal video game | One More Time Pro | 2005 | Unknown Korea |
| Nintendo GBA cart. | One Piece - Dragon Dream! Model AGB-BIPJ-JPN | 2005 | Bandai Co., Ltd. Japan |
| Nintendo GameCube disc |  One Piece - Grand Battle Model DOL-GOPE-USA | 2005 | Bandai America, Inc. 45557 |
| Nintendo GameCube disc | One Piece - Grand Battle! Rush | 2005 | Bandai Co., Ltd. Japan |
| Nintendo GameCube disc | One Piece - Pirates' Carnival Model DOL-GIPJ-JPN | 2005 | Bandai Co., Ltd. Japan |
| Nintendo GBA cart. | One Piece Model AGB-BONE-USA | 2005 | Bandai America, Inc. 45557 |
| Slot Machine | Onihama Bakusou Gurentai | 2005 | Ginza Japan |
| Pachislot | Onimusha 3 | 2005 | Rodeo Corp. Japan |
| PC/MS-Windows CD | Onimusha 3 - Demon Siege Model 683100 | 2005 | Ubisoft Ent. Montreuil sous Bois, France |
| PC/MS-Windows CD | Onnakyoushi Kimishima Misa | 2005 | Black Lilith |
| Pachinko | Onyanko Club | 2005 | Sansei R&D Japan |
| Pachinko | Ooumi Monogatari - Great Sea Story | 2005 | Sanyo Japan |
| Slot Machine | Opal Ring | 2005 | WMS Gaming, Inc. Chicago, IL, USA |
| Microsoft XBOX disc | Operation Flashpoint - Elite | 2005 | Unknown |
| PC/MS-Windows CD | Oppai Slider | 2005 | Illusion Japan |
| PC/MS-Windows CD | Oppai Slider 2 | 2005 | Illusion Japan |
| Slot Machine | Orchid Magic | 2005 | Aristocrat Leisure Industries Pty, Ltd. |
