Jack Campbell

Jack Campbell is a character from Doom 3 who weilds one of the most powerful weapons in the game, the BFG 9000. At least until a possessed Sergeant Kelly takes it from him and uses it as Sabaoth.

Jack is seen with Councilor Swann in some of the cutscenes, athough during gameplay the player gets a chance to watch him ice an Arch-Vile through a window using the BFG 9000.