| Map | Title | Author | Players | |
|---|---|---|---|---|
| u0cats2 | Cats 2 ... an unreal zero map | Bill Spencer. | Unknown | |
| UHH2 | ZoomPOD | Blaise Frazier | Unknown | |
| Ultra_DMAriza | DMAriza | Myscha the Sled dog | Unknown | |
| UnhipDm1 | The Edge | Schmuck and Poindexter | Unknown | |
| Unreal | Nali Castle | Shane Caudle | Unknown | |
| Unreal Editor Tutorial | Unreal Editor Tutorial 1.0 | commander | 30 | |
| Unreal_SkyTown | Na Pali Haven | Jeremy War | Unknown | |
| Unreal_Vortex2 | Vortex Rikers | Cliff Bleszinski | Unknown | |
| UNRTHORMAP5b | Haugspori Plain: Outer Temple Wall | Ted Halsted (Unreal converstion by REPB) | Unknown | |
| UPB-E3L6D | Combat in the Terrarium | Elya Iceking | Unknown | |
| Urbanisum | Urbanisum | LilSatchMo | Unknown |