Call of Duty 4

Collect the indicated number of Intel Pieces (enemy laptop computers) hidden throughout the game to unlock the corresponding cheat option:

COD Noir: 2 Intel Pieces. Turns graphics black and white.

Photo-Negative: 4 Intel Pieces. Inverts the colors.

Super Contrast: 6 Intel Pieces. Increases the contrast.

Ragtime Warfare: 8 Intel Pieces. Silent Movie mode; graphics are black and white, dust and scratches fill the screen, game plays at two times the speed, and the music becomes piano music.

Cluster Bombs: 10 Intel Pieces. Frag grenades are more powerful.

A Bad Year: 15 Intel Pieces. Enemies explode into tires when shot.

Slow-Mo Ability: 20 Intel Pieces. Slow motion game play.

Infinite Ammo: 30 Intel Pieces.

Accomplish the indicated achievement to get the corresponding number of Gamerscore points. Note: Enabling cheats will prevent achievements from being earned.

Make the Jump (20 points): Infiltrate a cargo ship.
Earn a Winged Dagger (20 points): Complete 'F.N.G.'.
Win the War (40 points): Complete the game on any difficulty.
Dancing in the Dark (20 points): Kill the power.
Save the Bacon (20 points): Protect 'War Pig', the Abrams tank.
Death From Above (20 points): Operate an AC-130 gun ship.
Wrong Number (20 points): Find Al-Asad's safehouse.
Piggyback Ride (20 points): Carry Cpt. MacMillian to safety.
Desperate Measures (20 points): Corner Zakhaev's Son.
Look Sharp (20 points): Find 15 enemy intel items.
Eyes and Ears (20 points): Find 30 enemy intel items.
Down Boy Down (20 points): Survive a dog attack.
New Squadron Record (20 points): Complete the cargo ship mockup in less than 20 seconds.
Rescue Roycewicz (20 points): Save Pvt. Roycewicz on the stairs.
Your Show Sucks (20 points): Destroy all the TVs showing Al-Asad's speech.
Man of the People (10 points): Save the farmer.
Straight Flush (20 points): Kill 5 enemies with one shot while in the AC-130 gunship.
Ghillies In The Mist (20 points): Complete 'All Ghillied Up' without alerting any enemies.
Mile High Club (20 points): Sky dive to safety on Veteran difficulty.
No Rest for the Weary (10 points): Stab an injured crawling enemy.
Deep and Hard (90 points): Complete the game on Hardened or Veteran difficulty.
The Package (40 points): Complete 'Crew Expendable' on Veteran difficulty.
The Rescue (40 points): Complete 'Blackout' on Veteran difficulty.
The Search (40 points): Complete 'Charlie Don't Surf' on Veteran difficulty.
The Bog (40 points): Complete 'The Bog' and 'War Pig' on Veteran difficulty.
The Escape (40 points): Complete 'Hunted' and 'Death From Above' on Veteran difficulty.
The First Horseman (40 points): Complete 'Shock and Awe' on Veteran difficulty.
The Second Horseman (40 points): Complete 'Safehouse' on Veteran difficulty.
The Shot (40 points): Complete 'All Ghillied Up' and 'One Shot, One Kill' on Veteran difficulty.
The Third Horseman (40 points): Complete 'Heat' and 'The Sins of the Father' on Veteran difficulty.
The Ultimatum (40 points): Complete 'Ultimatum', 'All In', and 'No Fighting in the War Room' on Veteran difficulty.
The Fourth Horseman (40 points): Complete 'Game Over' on Veteran difficulty.
Daredevil (10 points): Kill an enemy while blinded by a flashbang in the single player campaign.
Roadkill (10 points): Kill 2 enemies by blowing up a car in the single player campaign.
Bird on the Ground (20 points): Shoot down an enemy helicopter with an RPG in the single player campaign.
Four of a Kind (20 points): Kill 4 enemies in a row with headshots in the single player campaign.
Three of a Kind (10 points): Kill 3 enemies in a row with your knife in the single player campaign.