Call of Duty: Zombie Outbreak

The game is inspired by the bonus Call of Duty Zombie maps. It is set in a post-apocalyptic planet. Please note not to any Call of Duty or real world storyline.

America but not how it should be...
The mission starts with Alex Mason being woken up by Frank Woods. He beckons you over to a wrecked apartment building. Once inside you meet up with a squad of soldiers. Suddenly Zombies attack and you must defend the apartment from hordes of Zombies. Eventually you start to become overrun meaning you have to barricade yourself in the basement.

Z for Zombies
You now take control of Dmitri Petrenko in Moscow.