This is probably well known and its not a bug either, but I will type it nonetheless for the people just starting out. You need a friend or be able to load up two Gunz accounts (Dunno if you can do it on the same computer. I have trouble running gunz itself so I use my other computer). Its really simple... All you do is password a game and put both of your guys in there. Make it a smallish map for best results. Just dummy kill the other player until you have enough bounty or exp. And if that is your friend, let him do it a few times too