You killed a Rockstar in multiplayer.

Achieve a combo streak of 42

You have completed the first mission.

Complete "Exodus in America".

Use planks and sticks to make a sword.

Start the Single Player Campaign on any difficulty.

Use planks and sticks to make a pickaxe.

Melee 5 enemies in a row.

Survive 1 wave in a Special Ops Survival game.

Craft a workbench with four blocks of wooden planks.

In TranZit, kill one of the denizens of the forest while it is latched onto you.

Perform a 25-hit combo.

Unlock Wildmutt.