There are 30 Bronze Trophies, 12 Silver Trophies, 2 Gold Trophies, and 1 Platinum Trophy for this title.

Bronze:

"When It Rains, It Pours"
Objective: Complete 'Eviction' on Veteran difficulty.

Architect
Objective: Complete 'Vendetta' on Veteran difficulty.

Bearing the Burden
Objective: Complete 'Downfall' on Veteran difficulty.

Bloody Peleliu
Objective: Complete 'Little Resistance' on Veteran difficulty.

Blowtorch and Corkscrew
Objective: Complete 'Blowtorch and Corkscrew' on Veteran difficulty.

Blue Ribbon
Objective: Complete a 4-player Competitive Co-Op match in 1st place.

Close Shave
Objective: Survive a banzai attack.

Fearless
Objective: Complete 'Relentless' on Veteran difficulty.

For the Motherland
Objective: Complete 'Heart of the Reich' on Veteran difficulty.

Get Your Hands Dirty
Objective: Complete 'Semper Fi' on Veteran difficulty.

Get Your Left Foot Wet
Objective: Complete a match in Campaign Co-Op mode.

Get Your Right Foot Wet
Objective: Complete a match in Competitive Co-Op mode.

Guardian Angel
Objective: In the final battle for Okinawa, save Sergeant Roebuck.

Hell on Wheels
Objective: Complete 'Blood and Iron' on Veteran difficulty.

Lights Out!
Objective: In 'Black Cats', blast out all of the spot lights in the Japanese cargo convoy.

Mortar-dom
Objective: Kill 8 Japanese with thrown mortars in 'Breaking Point.

No Return
Objective: Complete 'Ring of Steel' on Veteran difficulty.

No Safe Place
Objective: Burn an enemy out of a tree with the flamethrower in 'Hard Landing'.

One Bad Gato
Objective: Complete 'Blackcats' on Veteran difficulty.

Purple Heart
Objective: When staring into the face of adversity, show courage and persevere.

Rough Economy
Objective: Kill 3 enemies with a single round.

Ruthless
Objective: Kill 15 enemies while mounted on a tank in 'Ring of Steel'.

Saved Private Ryan
Objective: Save the soldier before he burns to death.

Scorched Earth
Objective: Complete 'Burn 'em Out' on Veteran difficulty.

Shot in the Dark
Objective: Kill 10 enemies while the lights are out in the subway in 'Eviction'.

Snake in the Grass
Objective: Take out a Japanese soldier lying in wait in the grass.

The Hammer Strikes
Objective: Complete 'Their Land, Their Blood' on Veteran difficulty.

The Sun Sets
Objective: Complete 'Breaking Point' on Veteran difficulty.

The Sword Is Broken
Objective: Complete 'Hard Landing' on Veteran difficulty.

Weapon of Mass Destruction
Objective: Radio in a naval bombardment that kills at least 4 Japanese soldiers.

Silver:

Gunslinger
Objective: Assassinate General Amsel with a pistol shot.

Carlson's Raiders
Objective: Complete 'Semper Fi' on any difficulty.

Firestarter
Objective: Complete a level using only the flamethrower. Melee, grenades & explosives are OK.

Grave Robber
Objective: Collect all Death Cards in the game.

Iron Fist
Objective: Destroy all towers and bunkers in 'Blood and Iron'.

Kamikaze
Objective: Complete a level on Regular difficulty or higher using only melee or grenades.

Stabbed in the Heart
Objective: Complete all missions on the Eastern Front on any difficulty.

Stormed Peleliu
Objective: Establish a beachhead at Peleliu Island on any difficulty.

Sum of All Zeros
Objective: Down 45 Japanese Zeros in 'Black Cats'.

Throw a Six and a Half
Objective: On Hardened or Veteran difficulty, complete a level without dying.

The Last Stand
Objective: Survive the conflict in Okinawa on any difficulty.

The Professional
Objective: Shoot all of Amsel's henchmen, including their attack dog, without reloading.

Gold:

Hardened War Hero
Objective: Complete the game on Hardened or Veteran difficulty.

War Hero
Objective: Complete the game on any difficulty.

Platinum:

100% Complete
Objective: Unlock the platinum trophy by unlocking all other trophies.