WARNING: For skilled players only. Hold zombies off 4 sides at once. That's unless they come from the ceiling. Yeah, they like to come out of the ceiling.
Stick this in your maps folder. Be sure to type
in console before starting.
Mega thanks to
www.Facepunchstudios.com : for miscellaneous help.
[SS] Raccoon : For Beta testing help.
Obamma Yo Momma : Also for Beta testing help.