- X Y Z 2
- X-Cellerator 6
- X-COM Enforcer 2
- X-MAN (XPW) 5
- X-Raided 27
- X-Terminator(VoRTex) 2
- X.A.N.A 2
- X22887 2
- X3M 2
- Xankon 10
- Xanx 15
- Xanx..'Q~ 7
- Xanx..Q~ 3
- Xanx..~Q 3
- Xanx~Q 5
- Xavious 2
- Xcrari 9
- XDude 2
- XeivMaN 2
- Xeno 4
- XenoAisam 11
- Xenoyia 2
- Xer0392 2
- Xerdryn 3
- Xiner 4
- Xiphon 29
- Xiu 5
- xKc Massacre 5
- Xlucifer 9
- Xoleras 2
- Xolo 2
- XpanD - with the help of many others 3
- xqt 6
- xray 2
- XS Vehicles 2
- Xsjado & HumaK 4
- Xuhate 2
- XULLuxolid 2
- Xumari 3
- XxDeathmakerxX 7
- xXx (development)/CandyMan (request) 2
- Xxyz 2
- Xyx 2
- XYZ 8000 23