Reach the indicated Prestige and the corresponding Custom class will become available.

Unlock Custom Class 6:
Reach 1st Prestige.

Unlock Custom Class 7:
Reach 2nd Prestige.

Unlock Custom Class 8:
Reach 4th Prestige.

Unlock Custom Class 9:
Reach 7th Prestige.

Unlock Custom Class 10:
Reach 10th Prestige.

Complete the following challenges Online to recieve the corresponding bonus item for the indicated weapon.

Unlock Aperture Sight for Gewehr 43:
Get 75 kills with the Gewehr 43.

Unlock Aperture Sight for M1A1 Carbine:
Get 75 kills with the M1A1 Carbine.

Unlock Aperture Sight for MP40:
Get 75 kills with the MP40.

Unlock Aperture Sight for PPSh-41:
Get 25 kills with the PPSh-41.

Unlock Aperture Sight for STG-44:
Get 75 kills with the STG-44.

Unlock Aperture Sight for SVT-40:
Get 75 kills with the SVT-40.

Unlock Aperture Sight for Thompson:
Get 75 kills with the Thompson.

Unlock Aperture Sight for Type 100:
Get 25 kills with the Type 100.

Unlock Bayonet for Arisaka:
Get 75 kills with the Arisaka.

Unlock Bayonet for Kar98K:
Get 75 kills with the Kar98K.

Unlock Bayonet for M1 Garand:
Get 75 kills with the M1 Garand.

Unlock Bayonet for M1897 Trench Gun:
Get 75 kills with the M1897 Trench Gun.

Unlock Bayonet for M1A1 Carbine:
Get 100 kills with the M1A1 Carbine.

Unlock Bayonet for Mosin-Nagant:
Get 75 kills with the Mosin-Nagant.

Unlock Bayonet for Springfield:
Get 25 kills with the Springfield.

Unlock Bayonet for Type 99:
Get 75 kills with the Type 99.

Unlock Bipod for BAR:
Get 25 kills with the BAR.

Unlock Bipod for Browning M1919:
Get 25 kills with the Browning M1919.

Unlock Bipod for DP-28:
Get 25 kills with the DP-28.

Unlock Bipod for FG42:
Get 25 kills with the FG42.

Unlock Bipod for MG42:
Get 25 kills with the MG42.

Unlock Bipod for Type 99:
Get 25 kills with the Type 99.

Unlock Box Magazine for M1A1 Carbine:
Get 150 kills with the M1A1 Carbine.

Unlock Dual Magazines for MP40:
Get 150 kills with the MP40.

Unlock Extended Clip for Type 100:
Get 25 kills with the Type 100.

Unlock Flash Hider for M1 Garand:
Get 25 kills with the M1 Garand.

Unlock Flash Hider for M1A1 Carbine:
Get 25 kills with the M1A1 Carbine.

Unlock Flash Hider for STG-44:
Get 25 kills with the STG-44.

Unlock Flash Hider for SVT-40:
Get 25 kills with the SVT-40.

Unlock Grip for Double Barreled Shotgun:
Get 25 kills with the Double Barreled Shotgun.

Unlock Grip for M1897 Trench Gun:
Get 25 kills with the M1897 Trench Gun.

Unlock Rifle Grenade for Arisaka:
Get 150 kills with the Arisaka.

Unlock Rifle Grenade for Gewehr 43:
Get 150 kills with the Gewehr 43.

Unlock Rifle Grenade for Kar98K:
Get 150 kills with the Kar98K.

Unlock Rifle Grenade for M1 Garand:
Get 100 kills with the M1 Garand.

Unlock Rifle Grenade for Mosin-Nagant:
Get 150 kills with the Mosin-Nagant.

Unlock Rifle Grenade for Springfield:
Get 75 kills with the Springfield.

Unlock Round Drum for PPSh-41:
Get 75 kills with the PPSh-41.

Unlock Round Drum for Thompson:
Get 150 kills with the Thompson.

Unlock Sawed-Off Shotgun:
Get 75 kills with the Double Barreled Shotgun.

Unlock Sniper Scope for Arisaka:
Get 25 kills with the Arisaka.

Unlock Sniper Scope for Kar98K:
Get 25 kills with the Kar98K.

Unlock Sniper Scope for M1 Garand:
Get 150 kills with the M1 Garand.

Unlock Sniper Scope for Mosin-Nagant:
Get 25 kills with the Mosin-Nagant

Unlock Suppressor for Gewehr 43:
Get 25 kills with the Gewehr 43.

Unlock Suppressor for MP40:
Get 25 kills with the MP40.

Unlock Suppressor for Thompson:
Get 25 kills with the Thompson.

Unlock Suppressor for Type 100:
Get 25 kills with the Type 100.

Unlock Telescopic Sight for FG42:
Get 75 kills with the FG42.

Unlock Telescopic Sight for STG-44:
Get 100 kills with the STG-44.

Unlock Telescopic Sight for SVT-40:
Get 150 kills with the SVT-40.

Unlock Telesopic Sight for Gewehr 43:
Get 100 kills with the Gewehr 43.

When you type the following codes (without the quotes) in the barracks your clan tag will appear in the corresponding colour. These codes only work for games that are version 1.04.

Green Clan Tag:
Enter the code 'Grn'

Red Clan Tag:
Enter the code 'Red'

Blue Clan Tag:
Enter the code 'Blue'

Cyan Clan Tag:
Enter the code 'Cyan'

If you want the following effects on your name when you play Online then enter the corresponding case-sensitive code (without the quotes) as your Clan Tag.

Your Name Bounces from Left to Right:
Enter the code 'MOVE'

An 'o' Bounces from Left to Right in your Clan Tag:
Enter the code '....'

A Red Stripe goes Back and Forth through your Letters:
Enter the code 'cyln'

Your Name Flashes different Colours and Directions:
Enter the code 'Cycl'

A Rainbow Scrolls through your Name:
Enter the code 'RAIN'

Reach the indicated rank on Online Multiplayer to get the corresponding weapon.

Unlock Walther:
Reach Level 2.

Unlock Trench Gun (Shotgun):
Reach Level 2.

Unlock Springfield (Sniper):
Reach Level 3.

Unlock 1911 Colt:
Reach Level 3.

Unlock Arisaka:
Reach Level 4.

Unlock BAR:
Reach Level 4.

Unlock Gewehr 47 Level 6

Unlock Molotov Cocktail:
Reach Level 10.

Unlock MP40:
Reach Level 10.

Unlock Clan Tag:
Reach Level 11.

Unlock DP-28:
Reach Level 13.

Unlock M1 Garand:
Reach Level 17.

Unlock Mosin-Nagant:
Reach Level 21.

Unlock Type 100:
Reach Level 25.

Unlock Double-Barreled Shotgun:
Reach Level 29.

Unlock MG42:
Reach Level 33.

Unlock STG-44:
Reach Level 37.

Unlock Kar98k:
Reach Level 41.

Unlock FG42:
Reach Level 45.

Unlock .357 Magnum:
Reach Level 49.

Unlock PPSh-41:
Reach Level 53.

Unlock PTRS-41:
Reach Level 57.

Unlock Browning M1919:
Reach Level 61.

Unlock Flamethrower:
Reach Level 65

Unlock M1A1 Carbine:
Reach Level 65

When you reach the indicated number of kills without dying you will receive the corresponding kill streak bonuses.

Recon Plane:
Kill 3 enemies without dying and you are given the ability to call in a recon plane to mark enemies temporarily on your radar map. The only enemies that won't appear are ones using the Reconnaissance perk.

Artillery Strike:
Kill 5 enemies without dying and you are given the ability to call in an artillery strike. The area you select for the drop is completely obliterated.

Unleash the Dogs:
Kill 7 enemies without dying to enable the ability to call in attack dogs which will sniff out any enemies on the map.

The following become available for the indicated Perk slot when the corresponding task has been completed.

Perk Slot 1

Unlock Satchel Charge x2:
Reach Level 4 (2 remote detonation explosives).

Unlock Special Grenade x3:
Reach Level 4 (3 special grenades, no smoke).

Unlock M9A1 Bazooka x2:
Reach Level 4 (bazooka with 2 rockets).

Unlock Bomb Squad:
Reach Level 16.

Unlock Bouncing Betty x2:
Reach Level 24.

Unlock Bandolier:
Reach Level 40.

Unlock Primary Grenade x2:
Reach Level 44.

Unlock M2 Flamethrower:
Reach Level 65.


Perk Slot 2

Unlock Juggernaut:
Reach Level 4 (increased health).

Unlock Stopping Power:
Reach Level 4 (increased bullet damage).

Unlock Flak Jacket:
Reach Level 4 (reduce explosive damage).

Unlock Gas Mask:
Reach Level 4 (protect against Tabun Gas).

Unlock Fireworks:
Reach Level 4 (higher explosive weapon damage).

Unlock Camouflage:
Reach Level 12.

Unlock Sleight Of Hand:
Reach Level 28.

Unlock Shades:
Reach Level 32.

Unlock Double Tap:
Reach Level 36.

Unlock Overkill:
Reach Level 56.


Perk Slot 3

Unlock Deep Impact:
Reach Level 4 (deeper bullet penetration).

Unlock Extreme Conditioning:
Reach Level 4 (sprint for longer distances).

Unlock Steady Aim:
Reach Level 4 (increased hip fire accuracy).

Unlock Toss back:
Reach Level 6 (reset fuse of picked up grenades).

Unlock Second Chance:
Reach Level 9 (revive downed allies).

Unlock Martyrdom:
Reach Level 20.

Unlock Fireproof:
Reach Level 48.

Unlock Dead Silence:
Reach Level 52.

Unlock Iron Lungs:
Reach Level 60.

Unlock Reconnaissance:
Reach Level 64.


Vehicle Perks

Unlock Greased Bearings:
Reach Level 4 (increased turret rotation speed).

Unlock Water Cooler:
Reach Level 4 (decreased turret overheat).

Unlock Ordnance Training:
Reach Level 12.

Unlock Lead Foot:
Reach Level 28.

Unlock Coaxial Machine Gun:
Reach Level 40.

The following arsenal of weapons can be unlocked by completing the corresponding task.

Rifles

Unlock SVT-40:
Reach Level 4.

Unlock Gewehr 43:
Reach Level 7.

Unlock M1 Garand:
Reach Level 17.

Unlock STG-44:
Reach Level 37.

Unlock M1A1 Carbine:
Reach Level 65.

Unlock Flash Hider:
Complete Marksman Challenge 1 (invisible on radar when firing, reduced muzzle flash, but shorter range).

Unlock Suppressor:
Complete Marksman Challenge 1 (invisible on radar when firing, reduced muzzle flash, but shorter range).

Unlock Aperture Sight:
Complete Marksman Challenge 2 (precision sight).

Unlock Telescopic Sight:
Complete Marksman Challenge 3 (enhanced telescopic sight).

Unlock Rifle Grenade:
Complete Marksman Challenge 4 (grenade launcher attachment, replaces Perk 1 slot).


Bolt Action Rifles

Unlock Springfield:
Reach Level 4.

Unlock Arisaka::
Reach Level 4.

Unlock Mosin-Nagant:
Reach Level 21.

Unlock Kar98k:
Reach Level 41.

Unlock PTRS-41:
Reach Level 57.

Unlock Sniper Scope:
Complete Marksman Challenge 1 (accuracy and range increases).

Unlock Bayonet:
Complete Marksman Challenge 1 (melee attack range increases).

Unlock Bayonet:
Complete Marksman Challenge 2 (melee attack range increases).

Unlock Rifle Grenade:
Complete Marksman Challenge 2 (grenade launcher attachment, replaces Perk 1 slot).

Unlock Rifle Grenade:
Complete Marksman Challenge 3 (grenade launcher attachment, replaces Perk 1 slot).


Machine Guns

Unlock Type 99:
Reach Level 4.

Unlock BAR:
Reach Level 4.

Unlock DP-28:
Reach Level 13.

Unlock MG 42:
Reach Level 33.

Unlock FG 42:
Reach Level 45.

Unlock Browning M1919:
Reach Level 61.

Unlock Bipod:
Complete Marksman Challenge 1 (reduces motion for more accuracy).


Sub Machine Guns

Unlock Thompson:
Reach Level 4.

Unlock MP40:
Reach Level 10

Unlock Type 100:
Reach Level 25.

Unlock Ppsh:
Reach Level 41.

Unlock Suppressor:
Complete Marksman Challenge 1 (invisible on radar when firing, reduced muzzle flash, but shorter range).

Unlock Aperture Sight:
Complete Marksman Challenge 2 (precision sight).

Unlock Round Drum:
Complete Marksman Challenge 3 (increased ammunition capacity).

Unlock Dual Magazine:
Complete Marksman Challenge 3 (increased ammunition capacity).


Shotguns

Unlock M1897 Trench Gun:
Reach Level 4.

Unlock Double Barreled Shotgun:
Reach Level 29.

Unlock Grip:
Complete Marksman Challenge 1 (vertical foregrip to reduce recoil, replaces Perk slot 1).


Pistols

Unlock Colt M1911:
Reach Level 4.

Unlock Nambu:
Reach Level 4.

Unlock Walther P38:
Reach Level 4.

Unlock Tokrev TT-33:
Reach Level 21.

Unlock .357 Magnum:
Reach Level 49.


Primary Grenades

Unlock Frag:
Reach Level 4.

Unlock N 74 ST:
Reach Level 4.

Unlock Molotov Cocktail:
Reach Level 10.


Special Grenades

Unlock Smoke Grenade:
Reach Level 4.

Unlock Tabun Gas Grenade:
Reach Level 4.

Unlock Signal Flare Grenade:
Reach Level 4.


Extra custom Weapon Slots
When you reach the indicated Prestige rank the corresponding extra custom weapon slot will become available.

Unlock Slot 6:
Reach 1st Prestige.

Unlock Slot 7:
Reach 2nd Prestige.

Unlock Slot 8:
Reach 4th Prestige.

Unlock Slot 9:
Reach 7th Prestige.

Unlock Slot 10:
Reach 10th Prestige.

Complete the indicated task to unlock the corresponding feature.

Unlock Veteran Mode:
Veteran mode becomes unlocked when you reach Level 32. This feature is a Co-Op mode with enemies that are harder to defeat.

Unlock Zombie Mode:
Complete Campaign mode to unlock this feature which is a 4-Player Co-Op mode that has endless waves of Nazi zombies attacking you.