Stands for Team
Fortress Classic, an online gaming mod for Half-Life. Teams are typically made up of players from nine
classes (scout, sniper, soldier, demo man, heavy-weapons guy, pyro, medic, engineer
and spy), and are pitted against each other in various
missions, from capture-the-flag to eliminate-the-hunted.
Everything about the game is ancient, yet its replayability, fun factor, and absolute insanity are undeniable. TFC is a refreshing change from such 'serious' mods as Counter-Strike and Day of Defeat.