Complete training sequence.

Collect 25% of all relics.

Fully mod and completely upgrade any weapon.

Collect 5000 pieces of salvage.

Purchase all skills in one category.

Perform 50 headshot kills in the single player campaign.

Kill 50 enemies with the bow.

Find 25% of all documents.

Kill 35 enemies with the pistol.

Find Ajax. (Complete "Struck Down" on any difficulty.)

Rendez-vous in Fort Santa Monica. (Complete "Brave New World" on any difficulty.)

Visit every location of the game.