If you play a game in multiplayer mode, and the backspace key is'nt one of your controls, press backspace and then you have all guns.Press It again and you have more ammo. And, also, your BEST weapon is the dart pen, because in multiplayer mode, it kills your enemies in 1 hit. The only bad thing about this cheat is that it is hard to scroll around with your weapons because there are so many. That is another reason why I like the dart pen.