Find 75% of all documents.

Purchase all skills in one category.

Kill 35 enemies with the pistol.

Perform 50 headshot kills in the single player campaign.

Find 25% of GPS caches.

Kill and loot 10 small animals (rabbits, chickens, rats).

Find 25% of all documents.

Complete one challenge.

Kill the Tormenter

Get through the first Zero-G area

Impale an enemy and make him fly through the air for 17 meters - it must stick to the surface

Get your first Suit