if your playing with your friend/sibling/whoeveritis turn on the friendly fire, and then choose "big boxy" after that. while in the game if you got Mine and barrels, kill the zombies on that round and left 1 zombie, tell your friend to go round and round on te zombie so the zombie could follow him/her then you set traps on the entrance of zombies with barrels and mines. OR while your friendly fire is on. and then theres so many zombies. throw grenades (cluster bomb) EVERYWHERE with your friend. did this to my sibling our hands got numb.
 "Boxhead: 2Play Rooms"){kind=icon}