| Map | Title | Author | Players | |
|---|---|---|---|---|
| DOM-Octagon | Octagon | null | 8 | |
| DOM-OFFICEWORKS | Officeworks | TaroT | 6-12 | |
| DOM-Olden-sDOM | Olden Aquifer - wtf | Alan 'Talisman' Willard | 8 | |
| DOM-OldMineVM | The Abandoned Mine Domination | ViceM | 2-4 | |
| DOM-OMC-(ITC)Primoris | Primoris | Paulo CM Rosa | 2 - 6 | |
| DOM-OMC-Synthetik | Simbiotic Garden | 2'Face | 6 | |
| DOM-OMC-UP4EVER | DOM-OMC-UP4EVER | FraGnBraG | 6-10 | |
| DOM-Omega | Omega Station | GrandPappy | 6-12 | |
| DOM-Oneiros | Oneiros | 7ulian | 4-8 | |
| DOM-Osiris | Osiris' Tomb | Dave Ewing modified by: Molnár "makemeunreal" Balázs | 2 - 4 | |
| DOM-Ostonin | DOM-Ostonin | Schivosa | 12-16 | |
| DOM-Outdoors | Outdoors | Tsami | Three Teams - Nine | |
| DOM-Outerspace | DOM-OuterSpace | Dirk Ellerweg | 2-10 | |
| DOM-OuterWorld | Outer World | Qtit | 4-8 | |
| DOM-Overlord | Domination Overlord | Dave Ewing - Converted by RD | 8-12 |