For those of you who are new to the zombie society, there is a nice little permanent perk that will break you in just fine. First, what you have to do is buy the shotgun off of the wall, keep shooting it, reloading, and refilling its ammo. Once you do this a good number of times you will notice that a futuristic looking machine will be in your hand. What you got my friend is the ray gun! you can also refill its ammo from the shotgun on the wall as well. ( B.T.W. I believe this permanent perk will go away if you make it up to the skull rank in zombies, so don't be surprised if you refill the shotgun's ammo like 50 times and you still don't have it. you'll just be wasting money.) I hope this helped the noob zombie nation out there!