Rescue Jacob from the gulag

Stealth kill an enemy while they are having a conversation

Survive the avalanche

Translate a Monolith

Find 75% of GPS caches.

Purchase all skills in all categories.

Find 75% of all documents.

Fully mod and completely upgrade any weapon.

Kill 40 enemies with the shotgun.

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

Kill 75 enemies with the rifle.

Perform 15 finishers.

Purchase all skills in one category.