Save the farmer.

Kill 4 enemies in a row with headshots in the single player campaign.

Save Pvt. Roycewicz on the stairs.

Kill 3 enemies in a row with your knife in the single player campaign.

Infiltrate a cargo ship.

Complete 'F.N.G.'.

Find your first equipment upgrade.

Load out with a custom weapon.

Complete Black Sky.

Scan your first weapon!

Construct one type of each tool (one pickaxe, one spade, one axe and one hoe).

Cook and eat a pork chop.