Complete one Competitive Multiplayer game

Defeat four enemies with one explosion

Defeat 30 enemies with the PAK-80

Kill 10 enemies with thrown-back grenades

Defeat 50 enemies with stealth attacks

Defeat 30 enemies with the Mag 5

Defeat 50 enemies in a row without auto-reloading

Defeat ten enemies in a row, alternating hand-to-hand combat and gunplay

Defeat 20 enemies while swimming

Finish the game in Easy Mode

Defeat 100 enemies with headshots

Defeat 30 enemies with the Tau Sniper