we did 4 of us yesterday and still could only get to 13 untill last night when we got to 14.
we found something that really helps though in that help room, cause if you go left theirs a box you pay 900 to get a random wep, it can be anything fromg the game.
never had the ray gun before, but i like the mg42, i always start shooting my colt out of ammo, and then buy a carbine, after that open the door, en use the random weapon thing, I hate it when people open the topside thing,
you know the door that says "HELP" on it downstaires. Well pay 1000 to unlock it then as you walk into the room turn left and their is a long box on the floor. Pay 900 to open it and get a random wep. Sicko loves what he gets xD