| Map | Title | Author | Players | |
|---|---|---|---|---|
| ctf-icefields | icefields | keyser325 | 10 to 16 | |
| ctf-iceplanet | ctf-iceplanet | Unknown | Unknown | |
| CTF-Immulsion | Immulsion | Unknown | 6 to 12 | |
| CTF-ImpactBeta1 | Impact .I. | Siberio | 4 to 10 | |
| CTF-Impasse | Impasse | Unknown | Unknown | |
| CTF-Imperial_Pagoda_final | Imperial Pagoda | Unknown | Unknown | |
| CTF-Incinerator | Incinerator | Unknown | Unknown | |
| CTF-IndusRageUT3 | IndusRageUT3 | Unknown | Unknown | |
| CTF-Infiris | Infiris | Unknown | 8 to 26 | |
| CTF-Inner_Sanctums_Arena | Inner_Sanctums_Arena | Unknown | 8 to 12 | |
| CTF-Inner_Sanctums_UT3 | CTF-Inner_Sanctums_UT3 | Eldraad | 8 to 16 | |
| CTF-Intergalactic | Intergalactic | Michail 'Moloch' Levchinko | 2-16 | |
| CTF-Islands-X | Islands-X | Sander Vereecken "ZixXer" | 12 to 20 | |
| CTF-Isolated_Grounds | Isolated_Grounds | Leonardo "DavoX" Pellegrini | 6 to 10 | |
| CTF-Isometric | Isometric | p3rplx3d | Unknown |