Happy fragging. Have a question about a specific mpdata error? Leave a comment on your favorite COD4 forum – the community is still alive. Long live Modern Warfare.
%LOCALAPPDATA%\Activision\CoD4\players\profiles\[YourProfileName]\ Or in older installations: cod4 mpdata level 55
For players in 2007–2010 (and even today on community servers), reaching Level 55 was proof of dedication. It meant you had unlocked every weapon, every attachment, and every Camouflage and Challenge. But behind the scenes, all that data lived in a single, tiny, powerful file: the or, more famously, the mpdata file. Happy fragging