Humans vs. Zombies

This game takes place on a college campus and can last an entire semester there is no registration teams or any thing complicated.

the equipment need is:
a Nerf gun
a red bandanna
a yellow bandanna

when the game starts all the player are "humans" and wear red bandannas except one zombie who has a yellow bandanna.

here are the rules

1) the game cant be played in academic buildings.
2) when a Zombie tags (they cant use guns) a Human the Human becomes a Zombie and must switch his red bandanna for a yellow one.
3) when a Zombie is shot by a Human it can not touch any Human for fifteen minuets .

the game ends when every one is a zombie or the end of the semester

every one is responsible for their own guns bandannas etc. every man for him self!

a variation is humans wear a bandanna on there arm and Zombies wear it on their head