Jumped into State of Decay last night. Love the premise and for an Xbox Live Arcade game, you'd never think it was. Kinda plays and feels like a regular disc game.
Since you don't really play as a specific character but switch off between many people with different specializations(good at hand to hand combat, better cardio, marksmen, etc). Good tension with the zombies running around forcing you to use cover and hide in bushes to break their line of sight. Fighting can get really intense if you get caught up in it because if that character dies, they stay dead. No coming back and no reloading a save to try it differently, they are GONE!. I've restarted twice now because I've lost characters I liked. You do get to pick up some replacements(of the class you lost), though but I've not stuck it out yet
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