This product requires base game State of Decay in order to play.
"State of Decay: Lifeline puts you into the boots of Greyhound One, a military unit sent into a zombie-infested city to rescue the team of scientists who can put an end to the outbreak.
Lifeline features a new map, new characters, and a new way to play: Defend your base against hordes of zombies, using the best military equipment and personnel your unit can scrape together.
The fate of the city is in your hands. How many people can you save?"