Call of Duty 4: Modern Warfare Hints

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 - that add extra replayability to the game.

To play an all-new mission, which is an extra mission after the main quest is completed, beat the game and view the ending credits thereafter. After they've run their course, you will then be given the opportunity to play one last single player mission before all is said and done.

You can unlock all of the intel laptops automatically on the PC version of CoD4, but since you'll need to mess with your game's files a little bit, you're doing so at your own risk.

Simply go to your player profile (it will look something like this: C:program filesActivisionCall of Duty 4 - Modern WarfareplayersprofilesplayerYOURPROFILENAMEHERE), and search for a file called config.cfg.

Open the file by double-clicking it (or right-click it and open it in Notepad) and search for "cheat_points", minus the quotes, via the CTRL+F function. There will be a number next to cheat_points -- change it to "30" and all intel laptops will be automatically unlocked!