Team Fortress 2 achievements

Use a sentry gun to kill 25 enemy players that are capturing a point.

Win a round after the enemy team has opened the rocket lid.

Dominate 3 Engineers.

Backstab an Engineer, then sap 3 of his buildings within 10 seconds.

Kill 10 Medics with your bone saw.

Get the first kill in an Arena or Competitive match.

Smash an enemy player's head in with your guitar.

Kill your nemesis with a shovel.

Provide an enemy with a freezecam shot of you taunting above their ragdoll.

Defend a cap point 30 times.

Kill 1000 enemies.

Kill 50 enemies from behind with the Force-A-Nature.