Befriend your first Tailraider.

Earn the right to take on two-star assignments.

Escape the Jagras pack by hiding in some shrubs.

Kill 2 enemies by blowing up a car in the single player campaign.

Complete 'Crew Expendable' on Veteran difficulty.

Listened to all of the death letters of the fallen.

Clear half of the most-wanted board.

Complete Operation Sudden Death.

Complete Operation Pure Threat.

Complete Operation Burn Water.

Watch a news cast.

Load out with a custom weapon.

Go 2 minutes without double jumping or wall running in a mission where these abilities are available.