Stewie and Brian are in the underground laboratory beneath the city Stewie wants to go back to reality.

Peter's family have found the Umbrella secret laboratory and there's all kinds a monsters and zombies.

the Griffin family finds the entrance to the secret umbrella Laboratories Nemesis is still chasing them and Porky Pig is a train conductor.

there is a zombie outbreak in Quahog and nobody knows why and Stewie's got plenty of weapons it also contains references to other video game characters