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

The Professional Shoot all of Amsel's henchmen, including their attack dog, without reloading. (Solo only)

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

Rough Economy Kill 3 enemies with a single round.

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

War Hero Complete the game on any difficulty. (Solo only)

Stabbed in the Heart Complete all missions on the Eastern Front on any difficulty. (Solo only)

The Last Stand Survive the conflict in Okinawa on any difficulty. (Solo only)

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

Stormed Peleliu Establish a beachhead at Peleliu Island on any difficulty. (Solo only)

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

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

Get Your Left Foot Wet Complete a match in Campaign Co-Op mode. (Online co-op only)

Visari Ribbon Complete Visari Square on any difficulty level

Blood Ribbon Complete Blood Meridian on any difficulty level

Corinth Ribbon Complete Corinth River on any difficulty level

Key To The City You completed GTA IV to 100%.

Dare Devil You completed all the unique stunt jumps.

Endangered Species You collected every hidden package in the game.

No More Strangers You've met all the random characters.

Liberty City (5) Your friends all like you above 90%.

That's How We Roll! You unlocked the special ability of Brucie's helicopter ride.

Dial B For Bomb You unlocked the special ability of Packie's car bomb placement.

Retail Therapy You unlocked the special ability of buying guns from Little Jacob.

Genetically Superior You came first in 20 singleplayer street races.

Chain Reaction You exploded 10 vehicles in 10 seconds.