| Name | Group | Artist | Year | Type |
|---|---|---|---|---|
| Odyssey | Alcatraz | 1991 |
| |
| Oldskool Trippin | Haujobb | Xhale | 2000 |
|
| Optic Nerve | Silents PC | Jesper Kyd | 1993 |
|
| Optimal Torque | Dubius | Nitro | 1995 |
|
| Taken from the Dubious Demotunes musicdisk. | ||||
| Optimum Fuckup | Sanity | Jester | 1992 |
|
| Orbital | Kloon | Djamm | 1996 |
|
| Origin | Complex | Clawz | 1993 |
|
| OS/2 Warp Demo | Valhalla | Big Jim | 1995 |
|
| Other Dimension | Dubius | Nitro | 1994 |
|
| Taken from the Dubious Demotunes musicdisk. | ||||