# Veteran mode
Reach Level 32 to unlock Veteran mode, which is a Co-op mode with much tougher enemies.
# Zombie mode
Successfully complete Campaign mode to unlock Zombie mode, which is a four-player Co-op mode against endless waves of Nazi zombies.
# Bonus weapons
Successfully complete the indicated task to unlock the corresponding weapon or weapon attachment:#
Bolt Action Rifles
      Springfield: Reach Level 4.
      Bayonet: Successfully complete Marksman Challenge 1 (increases melee attack range).
      Rifle Grenade: Successfully complete Marksman Challenge 2 (grenade launcher attachment, replaces Perk 1 slot).
      Arisaka: Reach Level 4.
      Sniper Scope: Successfully complete Marksman Challenge 1 (increases accuracy and range).
      Bayonet: Successfully complete Marksman Challenge 2 (increases melee attack range).
      Rifle Grenade: Successfully complete Marksman Challenge 3 (grenade launcher attachment, replaces Perk 1 slot).
      Mosin-Nagant: Reach Level 21.
      Kar98k: Reach Level 41.
      PTRS-41: Reach Level 57. 
Rifles
      SVT-40: Reach Level 4.
      Flash Hider: Successfully complete Marksman Challenge 1 (invisible on radar when firing, reduced muzzle flash, but shorter range).
      Aperture Sight: Successfully complete Marksman Challenge 2 (precision sight).
      Telescopic Sight: Successfully complete Marksman Challenge 3 (enhanced telescopic sight).
      Gewehr 43: Reach Level 7.
      Suppressor: Successfully complete Marksman Challenge 1 (invisible on radar when firing, reduced muzzle flash, but shorter range).
      Aperture Sight: Successfully complete Marksman Challenge 2 (precision sight).
      Telescopic Sight: Successfully complete Marksman Challenge 3 (enhanced telescopic sight).
      Rifle Grenade: Successfully complete Marksman Challenge 4 (grenade launcher attachment, replaces Perk 1 slot).
      M1 Garand: Reach Level 17.
      STG-44: Reach Level 37.
      M1A1 Carbine Reach Level 65. 
Sub Machine Guns
      Thompson: Reach Level 4.
      Suppressor: Successfully complete Marksman Challenge 1 (invisible on radar when firing, reduced muzzle flash, but shorter range).
      Aperture Sight: Successfully complete Marksman Challenge 2 (precision sight).
      Round Drum: Successfully complete Marksman Challenge 3 (increased ammunition capacity).
      MP40: Reach Level 10
      Suppressor: Successfully complete Marksman Challenge 1 (invisible on radar when firing, reduced muzzle flash, but shorter range).
      Aperture Sight: Successfully complete Marksman Challenge 2 (precision sight).
      Dual Magazine: Successfully complete Marksman Challenge 3 (increased ammunition capacity).
      Type 100: Reach Level 25.
      Ppsh: Reach Level 41. 
Shotguns
      M1897 Trench Gun: Reach Level 4.
      Grip: Successfully complete Marksman Challenge 1 (vertical foregrip to reduce recoil, replaces Perk slot 1).
      Bayonet: Successfully complete Marksman Challenge 2 (increases melee attack range).
      Double Barreled Shotgun: Reach Level 29. 
Machine Guns
      Type 99: Reach Level 4.
      Bipod: Successfully complete Marksman Challenge 1 (reduces motion for more accuracy).
      Bayonet: Successfully complete Marksman Challenge 2 (increases melee attack range).
      BAR: Reach Level 4.
      Bipod: Successfully complete Marksman Challenge 1 (reduces motion for more accuracy).
      DP-28: Reach Level 13.
      MG 42: Reach Level 33.
      FG 42: Reach Level 45.
      Browning M1919: Reach Level 61. 
Pistols
      Colt M1911: Reach Level 4.
      Nambu: Reach Level 4.
      Walther P38: Reach Level 4.
      Tokrev TT-33: Reach Level 21.
      .357 Magnum: Reach Level 49. 
Primary Grenades
      Frag: Reach Level 4.
      N 74 ST: Reach Level 4.
      Molotov Cocktail: Reach Level 10. 
Special Grenades
      Smoke: Reach Level 4.
      Tabun Gas: Reach Level 4.
      Signal Flare: Reach Level 4. 
# Extra custom weapon slots
Reach the indicated Prestige rank to unlock the corresponding extra custom weapon slot:
      6: First Prestige
      7: Second Prestige
      8: Fourth Prestige
      9: Seventh Prestige
      10: Tenth Prestige 
# Perks
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.
      Bouncing Betty x2: Reach Level 24.
      Bandolier: Reach Level 40.
      Primary Grenade x2: Reach Level 44.
      M2 Flamethrower: Reach Level 65. 
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.
      Sleight Of Hand: Reach Level 28.
      Shades: Reach Level 32.
      Double Tap: Reach Level 36.
      Overkill: Reach Level 56. 
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.
      Fireproof: Reach Level 48.
      Dead Silence: Reach Level 52.
      Iron Lungs: Reach Level 60.
      Reconnaissance: Reach Level 64. 
Vehicle Perks
      Water Cooler: Reach Level 4 (decreased turret overheat).
      Greased Bearings: Reach Level 4 (increased turret rotation speed).
      Ordnance Training: Reach Level 12.
      Lead Foot: Reach Level 28.
      Coaxial Machine Gun: Reach Level 40. 
# Death Card locations
The Death Cards can be found at the following locations. Collect a Death Card to unlock its effect in Co-op mode.
#
Thunder
      Mission: Semper Fi (Eight of Hearts)
      Effect: Headshots cause enemies to explode
      Location: At the very beginning after leaving the shack, you will see another shack to the right. The card is inside. 
Hard Headed
      Mission: Little Resistance (Four of Clubs)
      Effect: Enemies take less bullet damage
      Location: At the end of the mission before going into the last building, look to the right. The card is in a corner of bushes. 
Suicide King
      Mission: Hard Landing (King of Hearts)
      Effect: Fire explosive pistol rounds while downed
      Location: About halfway through the mission you will see a big building with a mini-trench outside. Enter the building, and go into the lower level. The card is to the right when you go into the room with the stairs. 
Cold Dead Hands
      Mission: Vendetta (Five of Diamonds)
      Effect: Enemies take their weapons with them to the grave
      Location: After the sniper section at the first part of the mission, Reznov will lead you through a building. Follow the bar around to the end to find the card. 
Sticks & Stones
      Mission: Their Land, Their Blood (Joker)
      Effect: Your weapon arsenal consists of a knife and rocks
      Location: Destroy the tanks, and go through the barn. Search the stalls to your right to find the card. 
Vampire
      Mission: Burn 'em Out (Queen of Hearts)
      Effect: Can only recharge your health by getting kills
      Location: Just before the second mortar position is a bunker to the left. The card is inside. 
Flak Jacket
      Mission: Relentless (Nine of Diamonds)
      Effect: Enemies take less explosive damage
      Location: At the end of the mission, take either the left or right path. Eventually the paths will reconnect. The card is about halfway down the path. 
Body Armor
      Mission: Ring of Steel (Jack of Spades)
      Effect: Enemies die by headshot only
      Location: Enter the asylum, the immediately go to the left. The card is in the far bottom left corner. 
Undead Soldier
      Mission: Eviction (Ace of Spades)
      Effect: Enemies come back from the dead
      Location: During the first half of the mission, just after the kitchen area, you will eventually see a room to your right that has a large hole in it. Drop down to find the card. 
Painkiller
      Mission: Blowtorch & Corkscrew (Ten of Clubs)
      Effect: Shoot downed Co-op teammates to revive them
      Location: Go to the left as you move toward the second bunker. A Japanese soldier hanging upside down is near the card. 
Berserker
      Mission: Breaking Point (Three of Diamonds)
      Effect: Get three kills in five seconds to become Berserk
      Location: Clear all four mortar pits, then go to the small shack in the south of this area. The card is inside. 
Paintball
      Mission: Heart of the Reich (Six of Clubs)
      Effect: Paintball guns
      Location: The card is in the closed-off subway entrance across the street from the start of the mission. 
Victory
      Mission: Downfall (Two of Spades)
      Effect: Limits your HUD, turns on friendly fire, and bleed out in half the time
      Location: Before you get to the theater, some of your allies will break through a door to your right. The card is past that door. 
# Trophies
Successfully complete one of the following tasks to get a trophy:
      Get Your Hands Dirty (Bronze): Complete 'Semper Fi' on Veteran difficulty. (Solo only).
      Bloody Peleliu (Bronze): Complete 'Little Resistance' on Veteran difficulty. (Solo only).
      The Sword Is Broken (Bronze): Complete 'Hard Landing' on Veteran difficulty. (Solo only).
      Architect (Bronze): Complete 'Vendetta' on Veteran difficulty. (Solo only).
      The Hammer Strikes (Bronze): Complete 'Their Land, Their Blood' on Veteran difficulty. (Solo only).
      Scorched Earth (Bronze): Complete 'Burn 'em Out' on Veteran difficulty. (Solo only).
      Fearless (Bronze): Complete 'Relentless' on Veteran difficulty. (Solo only).
      Hell on Wheels (Bronze): Complete 'Blood and Iron' on Veteran difficulty. (Solo only).
      No Return (Bronze): Complete 'Ring of Steel' on Veteran difficulty. (Solo only).
      One Bad Gato (Bronze): Complete 'Eviction' on Veteran difficulty. (Solo only).
      Blowtorch and Corkscrew (Bronze): Complete 'Blackcats' on Veteran difficulty. (Solo only).
      The Sun Sets (Bronze): Complete 'Blowtorch and Corkscrew' on Veteran difficulty. (Solo only).
      For the Motherland (Bronze): Complete 'Breaking Point' on Veteran difficulty. (Solo only).
      Bearing the Burden (Bronze): Complete 'Heart of the Reich' on Veteran difficulty. (Solo only).
      Carlson's Raiders (Bronze): Complete 'Downfall' on Veteran difficulty. (Solo only).
      Weapon of Mass Destruction (Bronze): Save the soldier before he burns to death.
      The Professional (Bronze): Radio in a naval bombardment that kills at least 4 Japanese soldiers.
      Rough Economy (Bronze): In 'Black Cats', blast out all of the spot lights in the Japanese cargo convoy. (Solo only).
      Guardian Angel (Bronze): Kill 3 enemies with a single round.
      Close Shave (Bronze): In the final battle for Okinawa, save Sergeant Roebuck.
      Snake in the Grass (Bronze): Survive a banzai attack. (Solo only).
      Grave Robber (Bronze): Take out a Japanese soldier lying in wait in the grass.
      Throw a Six and a Half (Bronze): Burn an enemy out of a tree with the flamethrower in 'Hard Landing'.
      Firestarter (Bronze): When staring into the face of adversity, show courage and persevere.
      Mortar-dom (Bronze): Kill 15 enemies while mounted on a tank in 'Ring of Steel'.
      Shot in the Dark (Bronze): Kill 8 Japanese with thrown mortars in 'Breaking Point.
      Sum of All Zeros (Bronze): Kill 10 enemies while the lights are out in the subway in 'Eviction'.
      Get Your Left Foot Wet (Bronze): Complete a 4-player Competitive Co-Op match in 1st place. (Online co-op Only).
      Get Your Right Foot Wet (Bronze): Complete a match in Campaign Co-Op mode. (Online co-op only).
      Unknown (Bronze): Complete a match in Competitive Co-Op mode. (Online co-op only).
      Stormed Peleliu (Silver): Complete 'Semper Fi' on any difficulty. (Solo only).
      The Last Stand (Silver): Establish a beachhead at Peleliu Island on any difficulty. (Solo only).
      Stabbed in the Heart (Silver): Survive the conflict in Okinawa on any difficulty. (Solo only).
      Hardened War Hero (Silver): Complete all missions on the Eastern Front on any difficulty. (Solo only).
      Gunslinger (Silver): Shoot all of Amsel's henchmen, including their attack dog, without reloading. (Solo only).
      Lights Out! (Silver): Assassinate General Amsel with a pistol shot. (Solo only).
      No Safe Place (Silver): Collect all Death Cards in the game. (Solo only).
      Purple Heart (Silver): On Hardened or Veteran difficulty, complete a level without dying. (Solo only).
      Kamikaze (Silver): Complete a level using only the flamethrower. Melee, grenades & explosives are OK.
      Iron Fist (Silver): Complete a level on Regular difficulty or higher using only melee or grenades. (Solo only).
      Ruthless (Silver): Destroy all towers and bunkers in 'Blood and Iron'.
      Blue Ribbon (Silver): Down 45 Japanese Zeros in 'Black Cats'. (Solo only).
      War Hero (Gold): Complete the game on Hardened or Veteran difficulty. (Solo only).
      Saved Private Ryan (Gold): Complete the game on any difficulty. (Solo only).
      Platinum (Platinum): Awarded when all other trophies have been unlocked. 
