| Name | # Files | Name | # Files | Name | # Files | ||
|---|---|---|---|---|---|---|---|
| 0yvind_Aasheim | 1 | Offence | 2 | Omega_-Norway- | 2 | ||
| Omega_8 | 1 | Omicron | 1 | Omni | 2 | ||
| Oneway | 7 | Onslaught | 10 | Onslaught_Design | 7 | ||
| Opal | 1 | Oracle | 1 | Orbs | 2 | ||
| Oregon | 1 | Origo_Dreamline | 4 | Orion | 8 | ||
| Oscar_Giesen | 1 | Outcast | 2 | Oxsid_Planetary | 2 | ||
| Oxygen_-Australia- | 2 | Oxygen_-Poland- | 16 | Oxyron | 15 | ||
| Ozone | 2 |