This is an Xbox 360 game BUT it is great fun. BTW this game game out Wednesday, June 5th, 2013.
Gunna try and not spoil anything because there is somewhat of a storyline:
Essentially its an open world survival/rpg type zombie game. You start off with one character and need to figure out what the fuck is going on. Once you get your bearings straight and some decent supplies built up. You are able to move into a shelter. Once settled down into a base, you have a number of responsibilities. You have four main resources you need to maintain, Food, Ammo, Materials, and Fuel. Now the main ones are the first three, fuel is not used for cars but for creating things such as flamebombs/traps etc. Food is obvious that you need to maintain hunger, which is based on the number of survivors you have. So say you have four survivors and ten rations of food. Everyday those rations will go down by four. For ammo it depends on how many people you may have or if you have a watchtower built (get into buildings in a second). Materials are used for maintaining repairs and building facilities/upgrading them. How that works is in your building menu you have building squares where you can put buildings. You have a set number of building squares, which depends on how big your base is. (You are able to choose where you want to set up base and that will depend on if you have the requirements to stay there). Some of those buildings include a watchtower, which puts a survivor on guard duty and shoots any zombies that come into the area of the base. Sleeping quarters to prevent sleep deprivation and gives beds to the population, and many more. Now you will get more survivors, whether you randomly meet them, save them, encounter them on a mission, or they come seeking shelter at your base. Each character has their own unique traits/attributes. If the person liked to do something athletic such as hike, they will get a bonus in stamina. They could also have a unique attribute such as a doctor which helps with hurt/sick people. For basic stats you have things like, cardio, fighting, leadership, etc. You can increase these by simply running, fighting, and doing missions with other survivors. There are many missions to save other survivors, deal with infestations, look for supplies, deal with bandits, etc etc.
Debut Trailer
Gameplay Trailer
The game is $30 USD on the Xbox 360 arcade.
TL;DR
http://undeadlabs.com/about-state-of-decay/This game is fucking awesome. 10/10. Would bang