Collect 10 Hats.

Defeat 20 enemies with gunfire by aiming while hanging

Defeat 30 enemies with Mk-NDI grenades

Defeat 100 enemies with headshots

Defeat 20 enemies with a single punch, after softening them up with gunfire

You killed a Rockstar in multiplayer.

Complete one Competitive Multiplayer game

Defeat 50 enemies with hand-to-hand combat

Defeat 20 enemies with hand-to-hand combat

Successfully counter all of a Brute’s damage-giving attacks

Defeat 50 enemies with hand-to-hand combat

Find one treasure

Kill a zombie with 10 different melee weapons.