Call of Duty: World at War Cheats

Guardian Angel (Bronze): Kill 3 enemies with a single round.
Gunslinger (Silver): Shoot all of Amsel's henchmen, including their attack dog, without reloading. (Solo only).
Hardened War Hero (Silver): Complete all missions on the Eastern Front on any difficulty. (Solo only).
Hell on Wheels (Bronze): Complete 'Blood and Iron' on Veteran difficulty. (Solo only).
Iron Fist (Silver): Complete a level on Regular difficulty or higher using only melee or grenades. (Solo only).
Kamikaze (Silver): Complete a level using only the flamethrower. (Melee, grenades & explosives are OK).
Lights Out! (Silver): Assassinate General Amsel with a pistol shot. (Solo only).
Mortar-dom (Bronze): Kill 15 enemies while mounted on a tank in 'Ring of Steel'.
No Return (Bronze): Complete 'Ring of Steel' on Veteran difficulty. (Solo only).
No Safe Place (Silver): Collect all Death Cards in the game. (Solo only).
One Bad Gato (Bronze): Complete 'Eviction' on Veteran difficulty. (Solo only).
Platinum (Platinum): Awarded when all other trophies have been unlocked.
Purple Heart (Silver): Complete a level without dying on Hardened or Veteran difficulty. (Solo only).
Rough Economy (Bronze): In 'Black Cats', blast out all of the spot lights in the Japanese cargo convoy. (Solo only).
Ruthless (Silver): Destroy all towers and bunkers in 'Blood and Iron'.
Saved Private Ryan (Gold): Complete the game on any difficulty. (Solo only).
Scorched Earth (Bronze): Complete 'Burn 'em Out' on Veteran difficulty. (Solo only).
Shot in the Dark (Bronze): Kill 8 Japanese with thrown mortars in 'Breaking Point.
Snake in the Grass (Bronze): Survive a banzai attack. (Solo only).
Stabbed in the Heart (Silver): Survive the conflict in Okinawa on any difficulty. (Solo only).
Stormed Peleliu (Silver): Complete 'Semper Fi' on any difficulty. (Solo only).
Sum of All Zeros (Bronze): Kill 10 enemies while the lights are out in the subway in 'Eviction'.
The Hammer Strikes (Bronze): Complete 'Their Land, Their Blood' on Veteran difficulty. (Solo only).
The Last Stand (Silver): Establish a beachhead at Peleliu Island on any difficulty. (Solo only).
The Professional (Bronze): Radio in a naval bombardment that kills at least 4 Japanese soldiers.
The Sun Sets (Bronze): Complete 'Blowtorch and Corkscrew' on Veteran difficulty. (Solo only).
The Sword Is Broken (Bronze): Complete 'Hard Landing' on Veteran difficulty. (Solo only).
Throw a Six and a Half (Bronze): Burn an enemy out of a tree with the flamethrower in 'Hard Landing'.
War Hero (Gold): Complete the game on Hardened or Veteran difficulty. (Solo only).
Weapon of Mass Destruction (Bronze): Save the soldier before he burns to death.

Boost Specials DLC Trophies
Complete each condition to get the allotted Trophies. There are 2 Silver Trophies.

Complete a Timed Challenge using all 3 Boost types in the Hawker Mech (Silver): Awarded when you complete any Timed Challenge driving the Hawker Mech having used all 3 boost types.
Survive a Marked Man in the Extreme Hot Rod (Silver): Awarded for winning any Offline Marked Man driving the Extreme Hot Rod.

Legendary Cars DLC Trophies
Complete each condition to get the allotted Trophies. There are 4 Bronze Trophies.

Light up the Manhattan Spirit during an Online Challenge (Bronze): Awarded for using the flashing lights of the Manhattan Spirit during an Online Freeburn Challenge or Timed Challenge
Score a Boost Chain of x3 in the GT Nighthawk (Bronze): Awarded for achieving a Boost Chain of x3 driving the GT Nighthawk
Sound the horn on a Silver Lake Super Jump in the Cavalry Bootlegger (Bronze): Awarded for sounding the horn and successfully landing a Super Jump in Silver Lake driving the Cavalry Bootlegger
Win a Stunt Run in the P12 88 Special (Bronze): Awarded for winning any Offline Stunt Run driving the P12 88 Special

Map Pack 2 DLC Trophies
Complete each condition to get the allotted Trophies. There are 6 Bronze Trophies and 3 Silver Trophies.

Big Baller (Silver): Earn 75,000 points in a single Nazi Zombies game. (Map Pack 2 only)
Big Brawler (Bronze): Get 10 consecutive zombie melee kills before Insta-Kill expires. (Map Pack 2)
Deadhead (Silver): Get 150 zombie headshots in a single game. (Map Pack 2 only)
Fertilizer Man (Bronze): Kill 200 zombies in a single game. (Map Pack 2 only)
Hammer Time (Bronze): Repair 200 window boards in a single game. (Map Pack 2 only)
Its a Trap! (Bronze): Kill at least one zombie with three different traps in a single round. (Map Pack 2 only)
Perk-a-Holic (Bronze): Have all four perks simultaneously active in a game of Nazi Zombies. (Map Pack 2 only)
Soul Survivor (Silver): Reach round 15 in Nazi Zombies without getting revived. (Map Pack 2 only)
Weapon of Minor Destruction (Bronze): Kill no more than one zombie with a nuke. (Map Pack 2 only)

Party Pack Trophies
Complete each condition to get the allotted Trophies. There are 3 Bronze Trophies and 4 Silver Trophies.

Complete a Big Party (Silver): Awarded when 5-7 players have completed a Party.
Complete a Massive Party (Silver): Awarded when 8 players have completed an 8 Round Party.
Complete a Small Party (Silver): Awarded when 2-4 players have completed a Party.
Complete your 1st Party Round (Bronze): Awarded when you complete the 1st Round of your 1st Party.
Every player succeeds in a Party Round (Bronze): Awarded when every player successfully completes a Party Round.
Every player succeeds in every Party Game (Silver): Awarded upon completing a Party in which every player successfully completes every Game of every Round.
Every player take a photo for a Party (Bronze): Awarded when every player in a Party takes a photo of themselves. Requires a USB camera to be connected.

Toy Cars DLC Trophies
Complete each condition to get the allotted Trophies. There are 1 Bronze Trophy and 2 Silver Trophies.

Barrel Roll a Toy Car in the Airfield (Bronze): Awarded for successfully landing a Barrel Roll in the Airfield driving any of the Toy Cars
Complete a Bike Timed Challenge using the Toy Bike (Silver): Awarded when you complete any Timed Challenge using the Toy Bike
Win a Race in a Toy Car (Silver): Awarded for winning any Offline Race driving any of the Toy Cars

Map Pack 4 DLC Trophies
Another Dimension: Use the teleport 30 times
Best Of The Best: Upgrade the harpoon gun
Burn After Reading: Found Hitler's Documents
Feeling Fresh: Use the new perks in one game
Olden Days: Use the lucky dip 15 times
Rambo: Get to round 30 without going down

Modes
Complete certain objectives to unlock different game modes.

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.

Multiplayer unlockables
Reach a certain rank on online multiplayer to achieve each unlockable:

Browning M1919: Unlocked at level 61
Clan Tag: Unlocked at level 11
Custom Class Slot 10: Reach Prestige Level Ten
Custom Class Slot 6: Reach Prestige Level One
Custom Class Slot 7: Reach Prestige Level Two
Custom Class Slot 8: Reach Prestige Level Four
Custom Class Slot 9: Reach Prestige Level Seven
Double-Barreled Shotgun: Unlocked at level 29
DP-28: Unlocked at level 13
FG42: Unlocked at level 45
Kar98k: Unlocked at level 41
M1 Garand: Unlocked at level 17
M1A1 Carbine: Unlocked at level 65
MG42: Unlocked at level 33
Mosin-Nagant: Unlocked at level 21
MP40: Unlocked at level 10
PPSh-41: Unlocked at level 53
PTRS-41: Unlocked at level 57
STG-44: Unlocked at level 37
Type 100: Unlocked at level 25

Unlockable Perks
Reach a certain level online:

Bandolier: Reach level 40
Bomb Squad: Reach rank 16
Bouncing Betty x 2: Reach level 24
Camouflage: Reach level 12
Coaxial Machine Gun(vehicle): Reach level 40
Dead Silence: Reach level 52
Deep Impact: Reach rank 1
Double Tap: Reach level 36
Extreme conditioning: Reach rank 1
Fireproof: Reach level 48
Fireworks: Reach rank 1
Flak Jacket: Reach rank 1
Gas Mask: Reach rank 2
Greased Bearings(Vehicle): Reach rank 2
Iron Lungs: Reach level 60
Juggernaut: Reach level 4
Leadfoot(vehicle): Reach level 28
M2 Flamethrower: Reach level 65
M9A1 Bazooka x2: Reach rank 2
Martydom: Reach level 20
Ordiance Training(vehicle): Reach level 12
Overkill: Reach level 56
Primary Grenades x 2: Reach level 44
Reconnaissance: Reach level 64
Satchel charge x2: Reach rank 1
Second Chance: Reach level 9
Shades: Reach level 32
Sleight of Hand: Reach level 28
Special grenades x3: Reach rank 1
Steady Aim: Reach rank 1
Stopping power: Reach rank 1
Toss Back: Reach level 6
Water cooler(vehicle): Reach rank 1

Unlock Sgt. Reznow Gamer Picture
Reach 10th Prestige.

Clan Tag
Type these in the barracks for clan tag to appear that color (game must be version 1.04):

blue: clan tag will be blue
Cyan: Clan tag will be cyan
Grn: clan tag will be green
Red: clan tag will be red

Online Multiplayer Challenges
Complete the following challenges online to unlock the following:

Aperture Sight for Gewehr 43: Get 75 kills with the Gewehr 43
Aperture Sight for M1A1 Carbine: Get 75 kills with the M1A1 Carbine
Aperture Sight for MP40: Get 75 kills with the MP40
Aperture Sight for PPSh-41: Get 25 kills with the PPSh-41
Aperture Sight for STG-44: Get 75 kills with the STG-44
Aperture Sight for SVT-40: Get 75 kills with the SVT-40
Aperture Sight for Thompson: Get 75 kills with the Thompson
Aperture Sight for Type 100: Get 25 kills with the Type 100
Bayonet for Arisaka: Get 75 kills with the Arisaka
Bayonet for Kar98K: Get 75 kills with the Kar98K
Bayonet for M1 Garand: Get 75 kills with the M1 Garand
Bayonet for M1897 Trench Gun: Get 75 kills with the M1897 Trench Gun
Bayonet for M1A1 Carbine: Get 100 kills with the M1A1 Carbine
Bayonet for Mosin-Nagant: Get 75 kills with the Mosin-Nagant
Bayonet for Springfield: Get 25 kills with the Springfield
Bayonet for Type 99: Get 75 kills with the Type 99
Bipod for BAR: Get 25 kills with the BAR
Bipod for Browning M1919: Get 25 kills with the Browning M1919
Bipod for DP-28: Get 25 kills with the DP-28
Bipod for FG42: Get 25 kills with the FG42
Bipod for MG42: Get 25 kills with the MG42
Bipod for Type 99: Get 25 kills with the Type 99
Box Magazine for M1A1 Carbine: Get 150 kills with the M1A1 Carbine
Dual Magazines for MP40: Get 150 kills with the MP40
Extended Clip for Type 100: Get 25 kills with the Type 100
Flash Hider for M1 Garand: Get 25 kills with the M1 Garand
Flash Hider for M1A1 Carbine: Get 25 kills with the M1A1 Carbine
Flash Hider for STG-44: Get 25 kills with the STG-44
Flash Hider for SVT-40: Get 25 kills with the SVT-40
Grip for Double Barreled Shotgun: Get 25 kills with the Double Barreled Shotgun
Grip for M1897 Trench Gun: Get 25 kills with the M1897 Trench Gun
Rifle Grenade for Arisaka: Get 150 kills with the Arisaka
Rifle Grenade for Gewehr 43: Get 150 kills with the Gewehr 43
Rifle Grenade for Kar98K: Get 150 kills with the Kar98K
Rifle Grenade for M1 Garand: Get 100 kills with the M1 Garand
Rifle Grenade for Mosin-Nagant: Get 150 kills with the Mosin-Nagant
Rifle Grenade for Springfield: Get 75 kills with the Springfield
Round Drum for PPSh-41: Get 75 kills with the PPSh-41
Round Drum for Thompson: Get 150 kills with the Thompson
Sawed-Off Shotgun: Get 75 kills with the Double Barreled Shotgun
Sniper Scope for Arisaka: Get 25 kills with the Arisaka
Sniper Scope for Kar98K: Get 25 kills with the Kar98K
Sniper Scope for M1 Garand: Get 150 kills with the M1 Garand
Sniper Scope for Mosin-Nagant: Get 25 kills with the Mosin-Nagant
Suppressor for Gewehr 43: Get 25 kills with the Gewehr 43
Suppressor for MP40: Get 25 kills with the MP40
Suppressor for Thompson: Get 25 kills with the Thompson
Suppressor for Type 100: Get 25 kills with the Type 100
Telescopic Sight for FG42: Get 75 kills with the FG42
Telescopic Sight for STG-44: Get 100 kills with the STG-44
Telescopic Sight for SVT-40: Get 150 kills with the SVT-40
Telesopic Sight for Gewehr 43: Get 100 kills with the Gewehr 43