To unlock the "Cheat" menu, complete Campaign mode. It will appear under "Options". Activate the following cheats by collecting the corresponding numbers of intel. You must re-activate the cheats after dying:
CHEAT OPTION - INTEL A Bad Year - 15 Intel Cluster Bombs - 10 Intel CoD Noir - 2 Intel Infinite Ammo - 30 Intel Paintball - 8 Intel Photo-Negative - 4 Intel Slow-Mo Ability - 20 Intel Super Contrast - 6 Intel
Unlock the following Golden weapons by performing the corresponding tasks:
GOLDEN WEAPON - HOW TO UNLOCK Golden AK-47 - Beat all assault rifle challenges. Golden Desert Eagle - Reach level 55 "Commander" rank. Golden Dragunov - Beat all sniper challenges. Golden M1014 - Beat all shotgun challenges. Golden M60E4 - Beat all LMG challenges. Golden Mini-Uzi - Beat all SMG challenges.
Kill streak bonuses: During online multi-player mode you can call in an air-strike if you get a five kill streak without dying and a helicopter after a seven kill streak. You can call in the airstrike or helicopter at any time in the match, even if you die, as long as you acquired the necessary number of kills without dying. However, there is problem if you get a five kill streak and get two more without dying that allows you to call in a chopper. If you get a seven kill streak and have not used your airstrike, you will not be able to use it. You will be able to use the chopper in the same way. Basically you can get the ability to call in a chopper or airstrike and use it whenever desired, even in the finalminute of the game. This trick also works to call in a UAV after a three kill streak.