Complete the game.

Purchase all skills in all categories.

Rope pull 5 enemies off edges.

Complete all challenges.

Complete all conversations with the Endurance crew.

Fully mod and completely upgrade any weapon.

Find 75% of GPS caches.

Kill 75 enemies with the rifle.

Kill 50 enemies with the bow.

Shoot 10 enemies off zip lines.

Kill 40 enemies with the shotgun.

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

Kill 35 enemies with the pistol.