It turns out that you may not need commercials when you have zombies on your side.
Developer Undead Labs revealed today that its zombie-survival sim State of Decay has surpassed 2 million copies sold on Xbox 360 and Steam. The game reached this milestone despite a complete lack of official advertising. Instead, Undead Labs credits its fans for the success. In a blog on its website, the studio claims that people livestreaming the game helped spread the word and turned the small release into a bit hit. This shows the power of video platforms like livestreaming site Twitch and gameplay videos on YouTube. Those tools can help a game quietly go from quiet Xbox Live Arcade release to blockbuster hit.
GamesBeat