Rocket jump and kill 2 enemies before you land.
Jarate an enemy and the Medic healing him.
Upgrade 50 buildings built by other team members.
Charge and kill someone with your shield bash.
Jarate an enemy that you're dominating.
Kill an enemy Spy that you have been healing.
Achieve 17 of the achievements in the Spy pack.
Have a dispenser heal 3 teammates at the same time.