State of Decay is an open sandbox world that develops in real-time, dynamically generating content based on your actions, the choices you make, and the ever-increasing zombie threat. Decide where you’d like to set up a fortified safe haven for you and other survivors you’ve rescued, then form raiding parties to gather resources and create supply chains. Use the materials you’ve gathered to develop your community as you see fit, but be careful — resources will deplete as you pillage areas, and zombies are attracted to noise and activity. Take up the offensive by assaulting hordes before they reach your settlement, or focus on improving your defenses against the massed zombie attacks. Every choice and every action matter in this fully simulated, evolving world.

During a livestream chat Undead Labs' Jeff Strain and Brant Fitzgerald revealed some new PC details

Will the PC version have enhanced graphics? Higher res? Improved framerate? Yes. A high end PC can do all those things, so we're modifying the game to support those things. The PC version will not have different content or features, however.

What the PC version also won't have are modding tools (for time/testing reasons), but we have no objection to mods or modders, and we look forward to seeing what our PC players come up with.

Speaking of the PC version, Jeff confirmed that we are going to be taking part in Steam's Early Access program. That means we will be doing a controller-only PC version in advance of the final release for the purposes of feedback. The final version of the PC version will of course have keyboard/mouse support.

Finally, he confirmed that it would be out in 2013.

What if society came screeching to a halt? What if all our rules and laws no longer mattered? State of Decay brings these questions to life in a very real way. It’s not just about combat; it’s about doing what you must do to stay alive. Food, water, shelter, and ammo — you’ll need them all. Taking you beyond the initial panic, and beyond the first weeks of the crisis, State of Decay is the embodiment of the “What if?” zombie apocalypse scenario.

Move through the world like a zombie-slaying badass. Dive through windows, jump on cars, and take it to the living dead with baseball bats. Hop in a truck and mow down some undead pedestrians. Break into the local police station and clear out their arsenal or walk into the local grocery store to stock up on your favorite junk food. The world is your oyster…a shiny oyster that happens to be filled with zombies.

State Of Decay is currently available on XBLA for 1600 MS Points, with the PC version to follow later.