Hey guys I have all the achievements in the game except the Co-op. I have all the weapons so I can blaze through the game on easy. Assuming it doesn't lag a lot. This should give you a lot of extra cash to use on your hard and gold playthrough if you haven't done it already. When I attepmted to do it I was stuck with the crappy weapons because I wanted to get the Million Dollar Achievement before I started spending. Which I basically got at the end of the game. Also I will be on probably all night tonight. I am leaving for about an hour and a half now and when I get back I would like to do this.