Stealth kill an enemy while they are having a conversation

Survive the avalanche

Translate a Monolith

Complete the game.

Purchase all skills in one category.

Kill FeeFee the crab.

Find 25% of GPS caches.

Find 25% of all documents.

Kill and loot 10 large animals (deer, boar, wolves).

Kill 40 enemies with the shotgun.

Force an enemy to drop dynamite that kills two people when exploding.

Perform 50 headshot kills in the single player campaign.