| Game Title | Protected | Code No | Format | Notes |
| O.D.T. | NO | PAL & NTSC | ||
| Oddworld - Abes Exodus | NO | SLES-01480 | PAL UK | |
| Oddworld - Abes Exodus | NO | US NTSC | ||
| Oddworld - Abes Odysee | NO | PAL & NTSC | ||
| Oddworld - L'Exode D'Abe | NO | SLES-01502 | PAL FR | |
| Oddworld - L'Odyssee D'Abe | NO | SLES-00838 | PAL FR | |
| Off World Interceptor | NO | PAL & NTSC | ||
| Offensive | NO | PAL & NTSC | ||
| Ogre Battle | NO | NTSC US | ||
| Oh No! More Lemmings | NO | PAL & NTSC | ||
| Olympic Games | NO | PAL & NTSC | ||
| Olympic Soccer | NO | PAL & NTSC | ||
| Omega Boost | YES | NTSC JAP | ||
| Omega Boost | NO | PAL & NTSC | ||
| One | NO | PAL & NTSC | ||
| Onside Soccer | NO | PAL & NTSC | ||
| Over Blood | NO | PAL & NTSC | ||
| Over Blood 2 | YES | PAL EURO | Patch Available by BAD, which needs to be applied to both CD's | |
| Overboard | NO | PAL & NTSC |