| Map | Title | Author | Players | |
|---|---|---|---|---|
| ONS-P3846 | P3846 | [FC]Dia-Bllo | 16-32 | |
| ONS-P3846-beta | P3846 | [FC]Dia-Bllo | 16-32 | |
| ONS-pacman | PacMan | Dan Mead | 10 | |
| ONS-PaintedDesert | Painted Desert | Hointar | 12-24 | |
| ONS-Paludosus | Paludosus | SithNight | 16-32 | |
| ONS-PanCake | ONS-PanCake | THE SAVANT !!! | 1-16 | |
| ONS-PanCake_Mania | ONS-PanCake_Mania | THE SAVANT | 1 | |
| ONS-Pandemonium-SP1 | ONS-Pandemonium-Beta4 | Scott 'Silencer' Fredrick | 8-24 | |
| ONS-Paparena | Paparena | PaPaGaLoS | 16-40 | |
| ONS-Paparena | Paparena | PaPaGaLoS | 16-40 | |
| ONS-Pericale | Mt. Pericale | CyberSirius | 16 | |
| ONS-Perimeter | Perimeter | Nathillien Thilsa | 10-20 | |
| ONS-Pipeline | Pipeline | Donator | 12-16 | |
| ons-plainsnapali | Plains Of Napali | Alaney3 | 10-18 | |
| ONS-Planet-Mars | Planet-Mars | Alejandro Vitulich | 10-18 | |
| ONS-Platforms | ADAPT | CT Creations | 12-16 | |
| ONS-PlatformsSM | ADAPT | CT Creations | Unknown | |
| ONS-PMCbeta | ONS-PMC | Simeon and Vaughan | 10-20 | |
| ONS-PolarIceField | Polar Ice Field | Hointar | 12-20 | |
| ONS-Predominate | Predominate | -SeWeRsIDe | 12 | |
| ONS-Psychodelia_Hall | Psychodelia Hall | Dougster | 16-24 |