Successfully complete the indicated task to unlock the corresponding perk:
Perk Slot 1
Special Grenade x3: Reach Level 4 (three special grenades, no smoke).
Satchel Charge x2: Reach Level 4 (two remote detonation explosives).
M9A1 Bazooka x2: Reach Level 4 (bazooka with two rockets).
Bomb Squad: Reach Level 16 (seek out enemy explosives).
Bouncing Betty x2: Reach Level 24 (two pressure activated mines).
Bandolier: Reach Level 40 (extra ammunition magazines).
Primary Grenade x2: Reach Level 44 (two primary grenades).
M2 Flamethrower: Reach Level 65 (projects a controlled stream of fire).
Perk Slot 2
Stopping Power: Reach Level 4 (increased bullet damage).
Fireworks: Reach Level 4 (higher explosive weapon damage).
Flak Jacket: Reach Level 4 (reduce explosive damage).
Gas Mask: Reach Level 4 (protect against Tabun Gas).
Juggernaut: Reach Level 4 (increased health).
Camouflage: Reach Level 12 (undetectable to enemy recon planes).
Sleight Of Hand: Reach Level 28 (faster reload).
Shades: Reach Level 32 (reduce intensity of signal flares).
Double Tap: Reach Level 36 (increased rate of fire).
Overkill: Reach Level 56 (carry two primary guns, no pistol).
Perk Slot 3
Deep Impact: Reach Level 4 (deeper bullet penetration).
Extreme Conditioning: Reach Level 4 (sprint for longer distances).
Steady Aim: Reach Level 4 (increased hip fire accuracy).
Toss back: Reach Level 6 (reset fuse of picked up grenades).
Second Chance: Reach Level 9 (revive downed allies).
Martyrdom: Reach Level 20 (drop a live grenade when killed).
Fireproof: Reach Level 48 (reduce fire based weapon damage).
Dead Silence: Reach Level 52 (less sound when you move).
Iron Lungs: Reach Level 60 (longer breath hold while sniping).
Reconnaissance: Reach Level 64 (show enemy dogs, artillery, and tanks).
Vehicle Perks
Water Cooler: Reach Level 4 (decreased turret overheat).
Greased Bearings: Reach Level 4 (increased turret rotation speed).
Ordnance Training: Reach Level 12 (decrease reload time of turrets).
Lead Foot: Reach Level 28 (increases tank top speed).
Coaxial Machine Gun: Reach Level 40 (driver controlled machine gun).