Collect 75% of all relics.

Loot 200 enemies.

Kill and loot 10 flying animals (crows and gulls).

Purchase all skills in one category.

Kill 25 unaware enemies.

Find 25% of GPS caches.

Shoot 10 enemies off zip lines.

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

Perform 15 finishers.

Find 25% of all documents.

Complete one optional tomb.

Find Peng.