you unlock cheats such as a bad year where enemies turn into tires when you shoot them on single player
the only cheats that you can unlock in call of duty 4 are the ones from collecting Intel in the single player campaign. Other than that there are no other cheats for call of duty 4.
The intel items in Call of Duty: Modern Warfare 2 only unlocks trophies (PS3) or achievements (Xbox 360) when the player has collected 22 and 45 of the intel items. Unlike Call of Duty 4: Modern Warfare; collecting intel items do not unlock cheats for the single player campaign.
call of duty 2
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Call of Duty 1. Call of Duty 2: Big Red One Call of Duty 3. Call of Duty 4: Modern Warfare Call of Duty 5: World at War Call of Duty 6: Modern warfare 2 Call of Duty 7: Black Ops Call of Duty 8: Modern warfare 3 Call of Duty 8: Black Ops 2
Intel is Computers In Campaign that you Collect To Unlock CHEATS.
you get a trophy
call of duty has cheats you don't enter them tho you collect hidden Intel in the story mode then when you have beaten the game it unlocks cheats according to the number of Intel you have collected
you get unlimited ammo
nothing you just get achievements but infinity ward said that they will do what they did on cod 4 modern warfare 1 and make cheats for when u collect them
Over time, you get achievements when you collect enough.
Intel pieces are things that you collect during the process of the campaign, but they are hidden. if collect a certain amount they allow you to use cheats during the single player like unlimited ammo.
you have to collect all 30 enemy Intel items and activate it from the options menu
On consoles like wii and xbox you collect them to unlock cheat codes. there are 30 of them
You get an achievement/trophy.
http://www.supercheats.com/guides/call-of-duty-4/Intel-locations.shtml This website will explain where all the enemy Intel units are in the Call of Duty 4 campaign.