Kill 40 enemies with the shotgun.

Kill FeeFee the crab.

Rope pull 5 enemies off edges.

Kill 25 unaware enemies.

Purchase all skills in one category.

Shoot 10 enemies off zip lines.

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

Perform 50 headshot kills in the single player campaign.

Find 25% of GPS caches.

Collect 25% of all relics.

Find 25% of all documents.

Complete American Consumption on any difficulty

Complete a single player mission without being detected during gameplay