The Pyromania Update Title update for Team Fortress 2 has 17 achievements.
Have 2 BEST FRIENDS at the same time.
Have 6 teammates using Pyrovision at the same time.
Dominate a player using the Pyrovision Goggles and earn your own pair!
Pick up the Australium from its home position and capture it without dropping it.
Play in a game with 5 or more players from your Friends list.
Win 138 Rounds.
Launch the rocket as all 9 classes.
Kill 3 players riding the elevator within 10 seconds.
Win a round after the enemy team has opened the rocket lid.
Kill 6 enemies carrying the Australium during the same round.
Win a round with at least 5 teammates on the elevator.
Kill an enemy within the broken crate area while they attempt to pick up the neutral Australium.
Push a player into the rocket's exhaust path at the end of the round.
Kill an enemy who has damaged the Australium carrier in the last 3 seconds.
Achieve 7 of the achievements in the Doomsday pack.
Kill 79 enemies who have Balloonicorn pets.
Ignite 3 enemy players using your Rainblower taunt.