The Call of Duty 4 Achievements for Xbox 360 can be found here:
http://www.xbox360achievements.org/game/call-of-duty-4-modern-warfare/achievements/
http://www.xbox360achievements.org/game/call-of-duty/achievements/ There you go bud
You get various unlocks for weapons, new weapons, new perks, and camouflage for completing the achievements.
look here http://www.xbox360achievements.org/game/call-of-duty-world-at-war/achievements/
Yes you can unlock extra perks on call of duty four but you have to be playing on live and gain ranks. to do this you must win round with 1 or more kills.
actually it depends on what cheats you're using you cant get achievements if you have a specific kind of cheat on
youtube it.
You have to achieve them xD (Most of them include the single player campaign)
you can find a list of achievements at: http://www.xbox360achievements.org/game/call-of-duty-modern-warfare-2/achievements/ and also a guide for them at:http://www.xbox360achievements.org/game/call-of-duty-modern-warfare-2/guide/
Call of duty 4?
He was a Call of Duty MLG player for OptiC
The 2 secret achievements in Call Of Duty 5 can be unlocked by reaching prestige 1 and prestige 10 in multiplayer mode. They are called "It's All about Prestige" and "Go Get Some Sun" respectively.Both achievements are worth 0 gamerpoints.
Yes I do have Call of duty 4 for the Xbox 360.