by the way the chainsaw glitch also works with the sniper rifle...
heres another glitch you can use when you have survivors and you see them reloading just press the main menu to pause and they will still reload fast and easy way to kill some zombies
Tap R for reload realy fast and you should reload much faster hope this helps you guys
heres a cheat that you can do get the chainsaw in your main weapon and the 357. wesson smith magnum as your back up weapon then when you start a level when the screen turns black switch it to your magnum and you should have 50 bullets and by the way compound bow doesnt suck it has a 75% to kill a zombie in 1 hit depeding on the zone area you hit it in