McMohan is the tertiary antagonist in Red Faction: Armageddon and a resident of Bastion before and when the Plague Armageddon arose. McMohan seems to hate Red Faction and Darius Mason for failing to stop the terraformer from being destroyed by the Cultists. At one point, McMohan harasses a marauder named Kara, only to be driven off by Darius, who uses an Arc Welder to shock him. McMohan catches up with Darius and attempts to kill him. However, he is killed by a Berserker after the alien runs at him and explodes itself, blowing him to pieces.