Call of Duty 4: Modern Warfare/Enemy Intelligence

Throughout the game, there are pieces of Enemy Intelligence to collect. This will list the places to find it. These will unlock cheats in the options when a certain amount of intelligence is found and the game has been completed on any difficulty.

Crew Expendable 2/2

 * To the left of the two enemies that are are sleeping.
 * In the middle of the lower deck inside (with all the enemies)

Blackout 2/2

 * In the shack to the left near the enemy killed on the bridge near the start of the level
 * In the house that has the power cut it is in the bathroom (Beind the room Nikolai is in)

Hunted 1/3

 * Near the end of the level, where you have to get inside a barn, there will be a table under the shelter, the intelligence is there.