Call of Duty 4 makes you unlock weapons, weapon attachments and mods, camouflage, and challenges. Well there is a way around that because all of the data is stored client-side. To unlock all weapons for Call of Duty 4 multiplayer so that you don’t have to level up follow these easy instructions.
- Download this mpdata file.
- Go to Start -> Run-> Type regedit -> Hit Enter.
- Go to HKEY_LOCAL_MACHINE -> Activision -> Call of Duty 4
- Double-click codkey
- Save the key in notepad
- Replace the key with: DL2J8PY44Q22GE4888D2
- Press OK and close regedit.
- Navigate to your Call of Duty 4 profile folder (typically “C:\Program Files\Activision\Call of Duty 4 – Modern Warfare\players\profiles\your_user_name”)
- Back-up and then remove all the files in your user name folder.
- Place the mpdata file you downloaded in your user name folder
- Open the COD4 MP game and check your rank. You should now be level 55 with all challenges, guns, and every camouflage unlocked!
- Finally, in the game go to Options -> Multiplayer Options -> Key Code and type your original cd key you have saved in notepad.
There you go, you now have everything unlocked. Enjoy.