For the past month or two the modding problem on COD5 has been getting extremely out of hand. There is in every game 2+ People flying around the map killing you. The zombies aren't much better either. A bit ago I was searching and I joined a der riese lobby which when it started gave me Prestige 11 and full achievements I quit straight away but the damage was done - any way to get rid of this as it is really annoying being unable to earn achievements which I enjoy playing for; playing online because it keeps "corrupting" and it deletes all progress and puts me to my last "backup" on Prestige 11: Rank 65. I can't play enjoyably any more and its a real downer. Any support or am I just screwed?