Unlockables:
Weapon upgrades
7.62mm sniper rifle gun camera (Graves): Complete the first Mission.
7.62mm Sniper Rifle Suppressor (Graves): Complete 3 missions.
Automatic shotgun (Graves): Complete 8 missions.
Flashbangs (Graves and Lang): Complete 4 missions.
HEAT rocket launcher (Lang): Complete the first Mission.
Incendiary grenade (Lang): Complete 5 missions.
LMG 5.56mm 200-round magazine capacity (Lang): Complete 3 missions.
LMG 5.56mm 25% increased rate of fire (Lang): Complete 7 missions.
LMG 5.56mm 40mm grenade launcher (Lang): Complete 2 missions.
LMG 5.56mm Foregrip (Lang): Complete 9 missions.
Proximity mine (Graves): Complete 6 missions.
Shotgun attachment (Graves): Complete 2 missions.