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 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.
• This hat will split into two whenever someone wearing it dies; this also happens in Alien Swarm where if the player dies from infection, the parasite splits into two or three, depending on the difficulty.
• 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.
• The hat description was written by Grug. It was slightly edited by Valve.
• The tail is jiggleboned, swaying slightly as the wearer moves.

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