Undead Labs' State of Decay may be on its way to the Xbox One, but at this stage it'll be (very welcome) gravy on top of an already tasty and successful meal. The developer recently announced that its zombie survival game has accrued over two million sales... and that's not counting DLC.
This stat is a combination of both PC and Xbox Live Arcade sales; sadly for those hungry for more details, separate figures aren't shown. That said, the game managed over 500,000 sales from Live Arcade alone and hit one million four months later with the help of an Early Access release on Steam.
What's remarkable about the number, at least from Undead Labs' point of view, is that the game had no marketing or advertising, instead relying on "playing and streaming and spreading the word". It's no secret that YouTube and Twitch are an ever-increasing resource independent developers are tapping into to promote their games and State of Decay is another reminder of just how important they've become.