The Pyro Update Title update for Team Fortress 2 has 38 achievements.
Kill 50 Heavies with your flamethrower.
Achieve 22 of the achievements in the Pyro pack.
Ignite 10 Snipers while they are zoomed in.
Ignite 50 enemies capturing one of your control points.
Kill 3 enemies in a single ÜberCharge.
Kill a Soldier with a reflected critical rocket.
Kill 500 enemies.
Cause a dominated player to leave the server.
Achieve 16 of the achievements in the Pyro pack.
Kill 50 enemies with your flamethrower, from behind.
Ignite 5 enemies carrying your intelligence.
Ignite 10 enemies that have recently used a teleporter.
Ignite 10 cloaked Spies.
Kill 15 players while you're dead.
Achieve 10 of the achievements in the Pyro pack.
Ignite a rocket-jumping Soldier while he's in midair.
Provide enemies with freezecam shots of each of your taunts.
Ignite 3 Medics that are ready to deploy an ÜberCharge.
Ignite 10 disguised Spies.
Kill an enemy in the same second that he kills you.
Have 2 enemy Scouts on fire at the same time.
Kill a burning enemy who was ignited by another Pyro.
Ignite an enemy, and the Medic healing him.
Kill 3 enemies in a row, all within the same area.
Use your shotgun to finish off 20 players you've ignited.
Force 10 burning enemies to jump into water.
Ignite 5 Spies who have a sapper on a friendly building.
Kill 3 people with your axe in one life.
Kill 6 people with your axe in one life.
Kill 10 enemies while you're both underwater.
Destroy 50 Engineer buildings.
Do 1 million points of total fire damage.
Kill an enemy with a taunt.
Ignite an enemy Spy while he's flicking a cigarette.
Kill 3 enemies while they're taunting.
Kill 1000 enemies.
Ignite 100 enemies with the flare gun.
Reflect 100 projectiles with your compressed air blast.