Project Zomboid is an open-world, survival horror game developed by The Indie Stone for Microsoft Windows, Mac OS and Linux. At the moment the game is a single player game, in which you take on the role of Bob Smith, a man looking after his injured wife.
The story in Project Zomboid is a little vague at this point, due to it only being in Alpha. However, as Bob Smith you must protect your wife from the horde of the undead by gathering food, water and bandages to heal her wounds. In despair, Bob and Kate quickly take shelter in a home they found in Knox County. But be warned, undead aren't always the only threat.