How to get Zombie Beach Party: Use Browning, don't shot directly at them, shot the ground near them, and they will collapse on floor. When these lying-on-ground Zombies fully fill the arena, use dart instead, so the Browning won't explode the bodies. For Gone In 30 Seconds, select Selectioner level and nuke them every 5 seconds, that should do it. Sorry for my bad English. If you think this is usefull, please rate it up, so other players can see :peace