Call of Duty 4 (PlayStation 3)

Once you've beat the game on any difficulty, let the credits run all the way through, and when they finish, you'll start another mission.

This mission takes place on a plane the resembles Air Force One, and you must fight your way through a hoard of bad guys, save the V.I.P., and escape the plane in less than 2 minutes.

When you finish the game, you, also, unlock the Arcade Mode.

You will unlock the cheats by acquiring thirty Intel Pieces that are strewn throughout the game. The number of pieces that you need to collect in order to unlock the cheats are in bold, and the cheat they unlock is paired next to it.

2 Pieces: "CoD Noir;" Play the game in black and white.

4 Pieces: "Photo-Negative;" Game colors become invert.

6 Pieces: "Super Contrast;" Game's contrast increases.

8 Pieces: "Ragtime Warfare;" The game feels like an old silent movie.

10 Pieces: "Cluster Bombs;" One frag grenade thrown equals five in explosion.

15 Pieces: "A Bad Year;" Enemies explode into tires when shot.

20 Pieces: "Slow-Mo Ability;" Game plays at 40% normal speed.

30 Pieces: "Infinite Ammo"

Unlockable multiplayer weapons are based on your rank that you receive, so as you gain rank, you will gain the ability for more weapons.

Rank 4 : Sniper Rifle (M40)

Rank 10 : Assault Rifle (M4)

Rank 13 : SMG (Mini Uzi)

Rank 16 : Pistol (M1911)

Rank 19 : LMG (M60E4)

Rank 22 : Sniper Rifle (Dragunov)

Rank 25 : Assault Rifle (G3)

Rank 28 : SMG (AK-74U)

Rank 31 : Shotgun (M1014)

Rank 34 : Sniper Rifle (R700)

Rank 37 : Assault Rifle (G36C)

Rank 40 : SMG (P90)

Rank 43 : Pistol (Desert Eagle)

Rank 46 : Assault Rifle (M14)

Rank 49 : Sniper Rifle (Barret)

Rank 52 : Assault Rifle (MP44)

Rank 55 : Pistol (Golden Desert Eagle)

Golden Weapons are considered camo that you can obtain when you complete their respective weapon challenges. You can use them by choosing the gold camo of the respective weapon. The gold weapons are not enhanced, stronger, or more powerful, it's simply skin.

Golden Ak-47: Complete all Assault Rifle challenges.

Golden Desert Eagle (Not Skin): Reach Lv. 55

Golden Dragonuv: Complete all Sniper challenges.

Golden M1014: Complete all Shotgun challenges.

Golden M60: Complete all LMG challenges.

Golden Mini-Uzi: Complete all SMG challenges.