| Map | Title | Author | Players | |
|---|---|---|---|---|
| CTF-UdogzOfWar | UDOGZ of War | 4 | ||
| CTF-Underground-TDC | CTF-Underground{TDC} | 2-16 | ||
| CTF-UnderPressure[NC] | UnderPressure | 4-12 | ||
| CTF-UnderPressureCE[NC] | UnderPressure-ClanEdition | 4-12 | ||
| CTF-Unearthed | Unearthed City | 4-8 | ||
| CTF-Unearthed_SE | Unearthed City SE | 4-8 | ||
| CTF-Unknown | Unknown | 10-12 | ||
| CTF-UnrealEd | UnrealEd | 2-4 | ||
| CTF-UnrealPlaza | Unreal Plaza | 12 | ||
| CTF-Uranus | CTF-Unranus | 16 | ||
| CTF-USS Kobe | USS Kobe | 16 | ||
| CTF-UTronic | CTF-UTronic | 8-14 | ||
| CTF-UTronic_Rev | CTF-UTronic_Rev1 | 12-16 | ||
| CTF-UtterAnnihilation | Utter Annihilation | 12-16 |