Parasite Puncher is a Steam Achievement that is earned by killing a Parasite with a melee attack.


  • When the Parasite is frozen by a Freeze Grenade, the player has several seconds to punch it without the risk of becoming infested.
  • The Parasite can be slowed down with the Tesla Cannon or the Prototype Rifle's stun grenade (secondary fire).
  • On the Insane and Brutal difficulty levels, the Parasite can survive several seconds of burn damage after being ignited by a Flamer. During this time, the player has an opportunity to punch it without the risk of becoming infested; however, the Parasite can sometimes survive the full duration of the fire and regain the ability to infest a marine.

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