Purchase all skills in all categories.

Find all documents, relics and GPS caches.

Complete all challenges.

Complete all optional tombs.

Find 75% of GPS caches.

Purchase all skills in one category.

Shoot a bundle of dynamite out of the air.

Kill 35 enemies with the pistol.

Collect 5000 pieces of salvage.

Rope pull 5 enemies off edges.

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

Kill 50 enemies with the bow.

Perform 50 headshot kills in the single player campaign.