Team Fortress Classic is based on Team Fortress which was a Quake mod. In 1999, Valve hired the Team Fortress Quake modders to port their game to the GoldSrc (H

Team Fortress Classic is based on Team Fortress which was a Quake mod. In 1999, Valve hired the Team Fortress Quake modders to port their game to the GoldSrc (HL1) engine.