You can unlock cheats by finding the required number of Intel Laptops that are hidden throughout the single-player campaign.
10 - Cluster Bombs (grenades explode into a pile of grenades that also then explode)
Complete the following achievements to unlock Microsoft Gamerscore points.
Achievement | How to unlock | Points
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| - Beat IW best time on the Ship Training course in 'F.N.G.' (15.1 sec).
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| - Shoot down an enemy helicopter with an RPG in the single player campaign.
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| - Kill an enemy while blinded by a flashbang in the single player campaign.
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| - Operate an AC-130 gun ship
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| - Complete the game on Hardened or Veteran difficulty.
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| - Find the Desert Eagle in 'Crew Expendable' and kill 5 enemies with it.
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| - Kill 20 attack dogs with a knife.
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| - Kill 20 enemies with explosives in a single level.
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| - Find 30 enemy intel items.
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| - Kill all 4 tanks on the overpass with the Javelin missile in 'The Bog'.
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| - Destroy 8 enemy helicopters in 'Heat'.
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| - Kill 4 enemies in a row with headshots in the single player campaign.
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| - Complete 'All Ghillied Up' without alerting any enemies.
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| - Find 15 enemy intel items.
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| - Alert the enemy helicopter in 'All Ghillied Up' and take it down.
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| - Complete any level using only the knife to kill enemies.
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| - Sky dive to safety on Veteran difficulty.
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| - Complete the cargo ship mockup in less than 19 seconds.
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| - Stab an injured crawling enemy.
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| - Carry Cpt. MacMillan to safety.
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| - Kill at least 3 rappelling enemies in a single rope.
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| - Save Pvt. Roycewicz on the stairs.
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| - Complete any level without reloading your weapon (excluding 'The Coup' and 'Aftermath').
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| - Kill 2 enemies by blowing up a car in the single player campaign.
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| - Protect 'War Pig', the Abrams tank.
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| - Kill 5 enemies with one shot while in the AC-130 gunship.
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| - Complete 'The Bog' and 'War Pig' on Veteran difficulty.
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| - Complete 'Hunted' and 'Death From Above' on Veteran difficulty.
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| - Complete 'Shock and Awe' on Veteran difficulty.
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| - Complete 'Game Over' on Veteran difficulty.
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- The Man in the High Tower
| - Find and use the hidden cache in 'Heat'.
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| - Complete 'Crew Expendable' on Veteran difficulty.
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| - Complete 'Blackout' on Veteran difficulty.
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| - Complete 'Charlie Don't Surf' on Veteran difficulty.
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| - Complete 'Safehouse' on Veteran difficulty.
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| - Complete 'All Ghillied Up' and 'One Shot, One Kill' on Veteran difficulty.
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| - Complete 'Heat' and 'The Sins of the Father' on Veteran difficulty.
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| - Complete 'Ultimatum', 'All In', and 'No Fighting in the War Room' on Veteran difficulty.
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| - Kill 3 enemies in a row with your knife in the single player campaign.
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| - Kill Makarov and complete your mission
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| - Get a kill with each type of handheld gun, explosive and launcher in the single player campaign.
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| - Complete the game on any difficulty.
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| - Find Al-Asad's safehouse.
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| - Destroy all the TVs showing Al-Asad's speech.
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