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. This item can only be acquired from the achievement.

The hat description was written by Grug. It was slightly edited by Valve.

Related Achievements (in Alien Swarm)

Hat Trick Complete 2 co-op missions online. Earns a Team Fortress 2 parasite hat.

Trivia

• 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.
• This is the only promotional hat without a limited supply.
• This hat was tradeable in the release of the Mann-Conomy Update, but the following updates removed this possibility. However, this hat was made tradeable again in a later patch.
• When the hat is shot after falling off of its owner, it will bleed which proves that the hat is, or once was, alive.
• 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.
• The Parasite has its own sounds when moving it in the Backpack.

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