Call of Duty: Modern Warfare - Mobilized Cheats

Unlock Survival Mode
First go into the War Room from the Main Menu. Then go into the Options screen. In the Options screen type in the password. The downside to the password is that it only lasts until you turn the game off. Once you turn the game on again, you must re-enter the code and any progress made before will be lost.

[Select], [L], [R], [Select], [Y], [Y], [X], [R], [L], [X], [R], [Y]: Unlock Survival Mode

New Game Mode
Survival Mode: Beat The Game On It's Hardest Difficulty

Multiplayer weapon unlockables, Weapons Room (Bonus mode) unlockable
AA12 Automatic Shotgun: 100 Multiplayer kills with the Allied faction
AN94 Assault Rifle: 100 Multiplayer kills with the Enemy faction
Heckler-Koch HK MG4: 500 Multiplayer kills with the Enemy faction
M249 SAW Machine Gun: 500 Multiplayer kills with the Allied faction
M4 with Red Dot Scope: 50 Multiplayer kills with the Allied faction
P90 Sub Machine Gun: 300 Multiplayer kills with the Allied faction
Skorpion Machine Pistol: 50 Multiplayer kills with the Enemy faction
Steyr AUG A3: 300 Multiplayer kills with the Enemy faction
Weapons Room: Beat the Campaign on the Regular difficulty

Bonus modes
Beat campaign on different difficulties.

Arcade Mode: Beat campaign on regular or hardened difficulties
Mini-Game Mode: Beat campaign on any of the three difficulties
Survival Mode: Beat The Game On It's Hardest Difficulty