Thomas Kelly

Sergeant Kelly is one of the first charachters the player meets in Doom 3. He is the ranking non-com officer on the Mars Base, and will give you your first orders to go down to Mars City Underground to find the missing scientist.

After the demon invasion, Sergeant Kelly will make only one more personal appearence, as Sabaoth, a mutated freak with tank treds for legs, armed with one helluva mechanical claw and Jack Campbell's BFG 9000. He is the third boss out of four in Doom 3 and definitley a challenge with that gun strapped to his shoulder.