06-24-2010, 03:35 PM
I have tried this over and over and can't seem to grab the achievement. I have been doing in CO-OP with a buddy and 99% sure we have got everything. Also considering he has already done it and knows what to look for. Can this only be got in Solo form? I also have been doing all the shooting of all the cannisters myself. Am I doing something wrong or again do I need to do it Solo? Thanks for the help in advance.