Complete all challenges.

In multiplayer, be the only player on your team that isn't dead or downed.

Purchase all skills in all categories.

Complete all optional tombs.

Loot 200 enemies.

Fully mod and completely upgrade any weapon.

Find 75% of GPS caches.

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

Purchase all skills in one category.

Collect 5000 pieces of salvage.

Perform 50 headshot kills in the single player campaign.

Complete one challenge.