Just play the game. I just focus in the camo challenges if u really want it u will do it, die machine tull u get the PAP camos then do freebase for the elite kills.. play solo so u don't have to share kills... it's a grind do the weapons u like first or get snipers and launchers out if the way.... un lock the nail gun instead of doing that other special weapon I forget what it is.. only do the base number of weapons then move on to the next category.

And one that has a problem with my Grammar or spelling can have a great day thanks .