Originally Posted by JieXY
I do see a player who has got all the achievements from mygamercard.net.
It seems the new achievements worked as they should for him/her.
Some people might have been lucky.
Pretty much everyone I heard from have had their stats wiped out since the DLC went online. Luckily for me, I still have all my weapons and kills, but many people do have to start from scratch, including my partner in crime.