*A mechanic, bounty hunter, former marine and ex-cop with his primary weapon as a retractable chainsaw equipped to his right arm. Jack is the protagonist and player character of MadWorld, and is voiced by Steven Blum. Jack Cayman is ex-military special forces, an expert in all forms of combat, and an infamous Chaser. The Chaser Guild is a private organization that deals with cases regular police are not prepared to handle; kidnapping, disapearances, and fugitive apprehension.

Nearly 75% of Jack's body has been retrofitted with cybernetic parts, including jhis right arm, eyes, and skeleton. Combined with already superhuman strength and a vicious, double-bladed chainsaw mounted directly on his arm. Jack's fighting abilities are unmatched.*