Call of Duty 4: Modern Warfare PS3 Cheat

COD4: Modern Warfare Unlockables
After-Credit Sequences
Beat the game on any difficulty and let the credits run all the way through. When 
they finish, you'll start another mission. This mission takes place on a plane 
the resembles Air Force One, wherein you must fight your way through a hoard of 
baddies, save the V.I.P. and escape the plane in less than 2 minutes.

Also, when you finish the game, you unlock the Arcade Mode.

Unlockable	        How to Unlock
Arcade Mode	        Finish The Game
Air Force One Mission	Finish The Game

Cheats are unlocked not by inserting passwords, but by acquiring the thirty Intel 
Pieces strewn throughout the game. The more of them you collect, the more cheats 
you can access. On the left are the number of Intel Pieces collected, and on the
right are the cheats that are unlocked, with an explanation of what each does.

Unlockable	                                How to Unlock

"CoD Noir" Play the game in black and white	Collect 02 intel pieces
"Photo-Negative" Game colors become inverte	Collect 04 intel pieces
"Super Contrast" Game's contrast increases.	Collect 06 intel pieces

"Ragtime Warfare" The game feels like an old silent movie -  Collect 08 
intel pieces

"Cluster Bombs" One frag grenade thrown equals five in explosion -  Collect
10 intel pieces

"A Bad Year" Enemies explode into tires when shot	Collect 15 intel pieces
"Slow-Mo Ability" Game plays at 40% normal speed	Collect 20 intel pieces
"Infinite Ammo" Just what it says	Collect 30 intel pieces

Arcade Mode

Unlockable	How to Unlock
Arcade Mode	To unlock Arcade Mode, beat the game once through on 
any difficulty level. Arcade Mode itself is split into two options - 
Full Challenge or Level Challenge Using Golden Weapons

Golden weapons are considered as special camo that you obtain when you 
fully complete their respective weapon challenges. You can use them by 
choosing that gold camo of the respective weapon. Note: The gold weapons 
are not enhanced, stronger, or more powerful in any way, it's simply Skin

Unlockable How to Unlock:
Unlockable	How to Unlock
Golden Ak-47	Complete all Assault Rifle challenges.
Golden Mini-Uzi	Complete all SMG challenges.
Golden M60	Complete all LMG challenges.
Golden M1014	Complete all Shotgun challenges.
Golden Dragonuv	Complete all Sniper challenges.
Golden Desert Eagle (Not Skin)	Reach Lv. 55

Multiplayer Weapons
Unlockable multiplayer weapons are based on your rank you receive. As you 
gain in rank, you will gain the ability for more and more weapons.
Unlockable	How to Unlock
Assault Rifle (G3)	Rank 25
Assault Rifle (G36C)	Rank 37
Assault Rifle (M14)	Rank 46
Assault Rifle (M4)	Rank 10
Assault Rifle (MP44)	Rank 52
LMG (M60E4)	Rank 19
Pistol (Desert Eagle)	Rank 43
Pistol (Golden Desert Eagle)	Rank 55
Pistol (M1911)	Rank 16
Shotgun (M1014)	Rank 31
SMG (AK-74U)	Rank 28
SMG (Mini Uzi)	Rank 13
SMG (P90)	Rank 40
Sniper Rifle (Barret)	Rank 49
Sniper Rifle (Dragunov)	Rank 22
Sniper Rifle (M40)	Rank 04
Sniper Rifle (R700)	Rank 34
Multiplayer Perks
All these perks are obtained by a certain rank in multiplayer mode.
Unlockable	How to Unlock
Bomb Squad	Rank 14
Claymores	Rank 23
Bandolier	Rank 32
3 Frag Grenades	Rank 41
UAV Jammer	Rank 11
Sleight of Hand	Rank 20
Double Tap	Rank 29
Overkill	Rank 38
Last Stand	Rank 8
Martyrdom	Rank 17