[Update: 1-5-09] Due to Underground proactiveness, Chyea has re-done the video tutorial to lay down the hellfire that this hack does work. All you non-believers, watch the video and cleanse your eyes. If you cannot accept the fact that this hack work,s then you need to re-evaluate your own method.
“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 -> Software -> 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.
- IMPORTANT: you MUST join a server after the above step, stay in it for a couple of minutes so that the new cdkey will be encrypted onto your profile.
There you go, you now have everything unlocked. Enjoy.”
Note: if you’re using Windows XP, when choosing to save the mpdata file, make sure you put quotation marks -> “mpdata” as the file name. Otherwise XP will save it as a default txt(I think) format.
Note: if you are using a 64 bit OS, the registry path for the cdkey is as follows: HKEY_LOCAL_MACHINE —> SOFTWARE —> Wow6432Node —> Activision —> Call of Duty 4
Source (Thank you): http://karmarogue.com/2007/11/19/cod4-unlock-all-guns-level-55-crack/
Video tutorial: http://www.youtube.com/watch?v=LSP76WbLJ_Q&fmt=22
Video re-done and uploaded 1-5-09. Watch it in HD at youtube.
Also, to play COD4 in a window, add this to the shortcut: +r_fullscreen “0”