Well, i was playing Modern Warfare 2 online in the Search and Destroy modality, then i could see that my enemies we're using mods/hacks, i don't now. Well, just at the start of the game there was a guy behind me!, then i killed it, but something weird happened, in the screen there was a message 'Challenges Completed 10/100, 20/100, 30/100 ...' then eventually it was 100/100. I was freaked out, and i leaved the game.
Then i checked my titles and my challenges, and i almost cried. All of my weapons titles we're deleted, and my challenges we're al blocked and deleted.
I need some help, please. I want all of my things back.