Lunger

The Lunger is one of the many Chaos creatures. They do not have a ranged attack and rely on their melee attacks to produce damage. They will follow the player, but never jump, so it's possible to reach higher grounds than they can access and shoot them from a secure spot. Their melee attacks consists of using their mouth or their front limbs, and as they attack they move forward faster, thus being capable of reaching and damaging a player running in a straight line.

Lungers are big enemies which appear to be a hybrid between a dog, a bat and possibly a pig, mutated by Chaos. They are among the fastest enemies, faster than the player, but is slow to turn around after initiating an attack. They have plenty of health. They can appear in groups or individually, and they can block shots from both the player and other creatures.

Lungers are first encountered in Research and become extremely common enemies afterwards. They are the second most common melee foe after the Zombie.