Kill the Leviathan

Collect 8 schematics

Collect 75 Logs

Kill a Brute

Kill 30 enemies with the Pulse Rifle

Kill 30 enemies with the Plasma Cutter

Dismember 20 Limbs

Take the lead 10 seconds before the end of a session and go on to win (Multiplayer Only).

Complete "The Last Enemy That Shall Be Destroyed".

Complete "At Home with Dutch".

Kill 500 enemies with any rifle, repeater, or shotgun in any game mode.

Purchase a rare weapon from a gunsmith.

Score 750 points or more on a single kill (Multiplayer Only).