Sarge (as The Rock)
John Grimm
Samantha Grimm
Destroyer
Goat
Duke (as Raz Adoti)
Portman
The Kid
Pinky
Hell Knight
Mac
Dr. Carmack
Lt. Hunegs
Sanford Crosby
Dr. Jenna Willits
Dr. Hillary Tallman / Imp
Dr. Steve Willits
Dr. Olsen (as Petr Hnetkovsky)
Dr. Thurman
Dr. Clay
Dr. Carmack Imp / Sewer Imp
Female Evacuee (uncredited)
Girl at Bar (uncredited)
Security Guard (uncredited)
Dead Scientist Shot (uncredited)