Alien Swarm Parasite

“

You have thirty seconds to live! Click to listen — The Medic on parasite infections

”

The Alien Swarm Parasite is an unlockable headwear item for all Classes. It is obtained by earning the Hat Trick achievement in the game Alien Swarm by completing 2 co-op missions (regardless of difficulty setting) online.

Trivia

Hat Trick Achievement Icon

• This is the second hat that appears to be a living creature, the other being the Triboniophorus Tyrannus.
• This hat is the first and so far only item to be unlocked via the achievements of another game.
• This hat was speculated days before the game was even released due to the Heavy appearing on the icon for the Hat Trick achievement.
• This hat looks much like a facehugger from the Alien franchise or a headcrab, parasitic enemy from the Half-Life series.
• If you taunt with the Sniper's Kukri, Shiv or Bushwacka, the Sniper will very easily pull the parasite off of his head, before putting it back on - not a particularly clever idea if the hat is indeed alive.
• The Heavy wears his parasite hat differently in-game than on the Hat Trick achievement icon.
• This is the only promotional hat without a limited supply.
• With the Mann-Conomy Update, this hat emits the same sound as a Swarm Parasite in Alien Swarm when picked up in the backpack.
• This hat is tradeable with the induction of the Mann-Conomy Update
• The hat description was written by Grug. It was slightly edited by Valve.
• The tail is jiggleboned, swaying slightly as the wearer moves. Other examples of jiggle boned hats include the Respectless Rubber Glove, Triboniophorus Tyrannus, Max's Severed Head, Hustler's Hallmark, and Pugilist's Protector.
• The Alien Swarm Parasite is the most traded item on tf2items.com
• When the hat is shot after falling off of its owner, it will bleed which proves that the hat is or was once alive.
• When the Mann-Conomy Update came out, certain users were able to either craft or trade their Alien Swarm Parasites to other users.
• When trying to use this and another hat to rebuild headgear it will say no known blueprints.
• This is the only hat that appears on different locations on the head depending on what class is wearing it.
• Originally, the Heavy on the "Hat Trick" achievement icon had a beard.

Gallery

• ParasiteScout.png

  Scout

• ParasiteSoldier.png

  Soldier

• ParasitePyro.png

  Pyro

• ParasiteDemoman.png

  Demoman

• AlienParasiteHat.png

  Heavy

• ParasiteEngineer.png

  Engineer

• ParasiteMedic.png

  Medic

• ParasiteSniper.png

  Sniper

• ParasiteSpy.png

  Spy

• ParasiteTauntSniper.png

  Sniper taunting