Steam has sold over 2 million copies of the alpha build of the third-person, zombie survival game, DayZ.

It hasn't even been two years since we first caught wind of DayZ as a zombie apocalypse survival mod to Bohemia Interactive's Arma 2, and it is still continuing reel in some serious numbers. The standalone PC version of DayZ that was released via Steam Early Access program and sold over 1 million copies in less than a month when its alpha build debuted this past December.

DayZ creator Dean Hall has announced on his Twitter that the game has surpassed over 2 million copies sold through Steam. This is quite the remarkable number considering that DayZ is still technically in its alpha stage of development. This past February, Hall announced that he was stepping down as DayZ's lead developer to move back to home in New Zealand and form an indie game company of his own. We just can't wait to see what its sales numbers will be once the DayZ beta build arrives, or better yet, it's finalized version.

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