Zubben conversion
Original maps by Ronen Basch
Sven Conversion (RIPENT) by Xada

Future RoboGrunt re-skin by Zang-Pog
Houndeye, Bullsquid, Heavy Weapons Dude, M4A1 Rifle, Voltigore, Pitdrone reskins by Xada
Other Model Credits:

ValvE/Gearbox : Retail/DC/HD base models.
BlindShooter & Armael: Futuristic HGrunts (modified for Sven 5.0 animations and proper M4A1 rifle.)
BlindShooter: AR-20 futuristic assault rifle original model
QuakerCraft: Quadshot HL1 Port/rig
GarompaEstomper: Sven 5.0 hand rigs for Quadshot, Futuristic Pistol/Deagle, CSO Crowbar and the Snapbug Headcrab rig(presumably)
Nige111: Original Deagle pistol rig for HL1 and AR-20 futuristic assault rifle rig
Psonic: Original futuristic pistol free model.
Nexon: CSO Crowbar model.
Original M4A1 model author unknown.

If I missed anyone I'm sorry. Please let me know.
-Xada