In Quake II and 4, the Guards are a series of humanoid Strogg that have a weapon on their right arm - a blaster, Machine Gun or shotgun. Guards have low HP and will usually die with a few shots from a blaster. Because of their low endurance, guards usually patrol minor areas, such as barely used military bases. In Quake II, guards are seen operating machinery and performing menial tasks in addition to pulling guard duty. In Quake 4, Guards only defend minor military bases.
Guards that are encountered in Quake II:
Guards also encountered Quake II expansions:
Guards that are encountered in Quake 4: