Toxic Grunts are humans that have been mutated by the disease spread by the Plague Fiend. These are of the Grunt type of enemies. Toxic Grunts are wearing Gas Masks and may be immune to acid/poison effects. They emerge from wooden shacks. They also take the form of Snipers, Bombers, and Lobbers.
- Level 1: Grunt with a single spear.
- Level 2: Grunt dual-wielding a pair of cleavers.
- Level 3: Large grunt with a musket, equipped with a bayonet. Though they're not afraid to melee, their weapons can be used to shoot plague projectiles.