|| Complete 2 co-op missions online. Earns a Team Fortress 2 parasite hat.
Hat Trick is a Steam Achievement that requires you to complete any two missions on any difficulty level. Completing this achievment unlocks a special parasite hat for the Valve game Team Fortress 2.
- Grab some buddies, play on Easy, and get your darned hat!
- In Team Fortress 2, when you die, the parasite hat splits in two, as in Alien Swarm where several parasites come out of you when you die.
- In Team Fortress 2, the parasite hat is the second hat that consists of a living creature, after the triboniophorus tyrannus.
- In Team Fortress 2, it is currently the only hat that features different positions on each of the characters' heads.
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