- Conversion by Paul "icepick59" Fritts 5
- Conversion by Red Dwarf 7
- Converted By --=BliZz=-- 2
- Converted by "VT|CreepingDeath" 3
- Converted by James 'CreepingDeath' Morgan 4
- Converted by Red Dwarf 8
- Converted by sHoKaZuLu 2
- Converted by: Red_Dwarf 2
- Converted by: Red_Dwarf, Ultron & -=¤willhaven¤=- 2
- Cool 3
- CoolDude 5
- Cool_Dude 2
- Coop 2
- Cooper 2
- Cooper "BigBird" Faust 8
- Corey (Kyben) 9
- Corey Robinson 3
- Corey(:K256:) 6
- Cormac "Poneill" Donnelly 2
- Cormac Donnelly 2
- Corn 2
- Corrupt Mind 2
- Corruption 2
- Cory Spooner 'TheSpoonDog' + zOil for "CB" 7
- Cory Spooner 'TheSpoonDog', IG - khxmz 3
- Cosmix 9
- CouilleNoire (i4Games) 6
- Coversion by Red Dwarf 2
- Cow 4
- Cpl.Shepard 7
- Cr4zyB4st4rd 11
- Cr4zyB4st4rd.jV 2
- CraZyHorSe 2
- Cracker64 2
- Crackers 2
- Craig "khemzikal" Bachmann 4
- Craig Woodward AKA PhoneMonkey 2
- Crankcase 2
- Cranked for the boat 2
- Crash7 10
- Crayfish 4
- Crazy 10
- CrazyCraz 2
- CrazyJoeDevola 5
- Created by Jonathon Franks aka Deadman. 2
- Creavion 11
- CreepyD 4
- Crescent Moon Software 2
- Crimson 2
- Crista Forest 8
- Critter 6
- Crokx 55
- CrovaX* 8
- Crsk 2
- Crucibus 6
- Cruque 7
- Crusader 5
- Crusha K. Rool 4
- Cry0 2
- CryOniC 5
- Cube "Crypsis" 6
- Cube"Crypsis" 2
- Cubic / GIJoe / KillBait! 2
- Cutter 3
- CyanLongBow 24
- CyanLongBow and Entropy 2
- CybZ 2
- Cyber 2
- Cyber Emperor 24
- Cyber Nerd 2
- Cyber aka Coretez 3