| Mutator | Author | Info | |
|---|---|---|---|
| Scorpion Handling Kit | Stefan Xenos | 1 mutator | |
| Sentinel | Unknown | 3 mutators , 1 weapon | |
| Sentinel Gear V1.0 Final | Unknown | 3 mutators | |
| Sentinel Pyrotechnics 1.0 beta 1 | Miles Asvachin | 1 mutator | |
| Server Advertisements | Unknown | 1 mutator | |
| ShockSniperIII | HO0815XX | 1 mutator , 1 weapon | |
| Show Damage | Unknown | 1 mutator | |
| Shredder Arena | Unknown | 1 mutator , 1 weapon | |
| Spam Protector (UT3 Version) | Gugi | 1 mutator | |
| Spectate Botmatch | Wormbo | 1 mutator | |
| Spider Pack V1 0 | Unknown |