Oklahoma Outbreak Part 1

You and 2 friends have made your way to oklahoma city to rescue some scientists working on a cure for the virus. The city is infested with zombies and you must get through. You have made it to the outskirts of the city but your vehicle broke down. Upon trying to fix it hundreds of civilians spotted a horde of zombies approaching the nearby building. You realise the only way you will survive is to kill them all. As you and your friends grab your weapons you run to the nearby facility and prepare to defend! as more civilians rush to the saftey of the structure and the zombies draw ever closer!