I would like to offer my help for the 3 hardest trophies. I have a save file wich can give you the trophies in matter of minutes. Now you have to join on the save just before the ending, i complete the end and the trophy will pop
the trophies are:
alpha vs omega: have denyce attack and damage sgt.boykin
cramped quarters: get 8 survivors in a vehicle
purewal memorial cup: don't consume any meat,dairy or alcohol untill the military arrives
after that you just have to complete the story and the challenges in sandbox mode alone and in co op.
dim10 toyofreak no_plat_no_buy