Zombie Paintball in Colorado

Locked in a tight bunker with the last remaining survivors, you quickly take stock of your resources. There isn't a can of food or a drop of water, but there appears to be a crate packed with paintball guns and thousands of paintballs. You look at the others trapped with you and make a silent pact to fight the beings that are pushing against the door in an effort to get in. It is only a matter of time until the undead creatures break through and begin to feast on your brains. As that realization sinks in, you hear faint footsteps and guttural noises coming from another part of the bunker. You and your band of survivors are going to have to think fast and shoot faster if you're ever going to see sunlight again.