While announcing the two year anniversary of the original DayZ mod for Bohemia Interactive's Arma 2, DayZ creator Dean "Rocket" Hall revealed that the stand-alone game based on that mod has hit a brand new sales milestone. According to Hall, DayZ has sold over two million copies since its release on Steam Early Access.
The standalone sandbox zombie survival game launched on Steam as an Early Access title on December 16, 2013 and quickly made its way to the top of Steam's best-sellers list. The game, which is still in the early stages of development, costs $30. At that price, the game has made an estimated $60 million. Not too shabby for being an early access game and for only being on the market for a little over four months.
Quite rightly has been pointed out to me, that DayZ isn't out for 6 months until mid june. So actually, it's 2 million in just over 4 months
— Dean Hall (@rocket2guns) May 1, 2014
Earlier this year Hall announced that he would be leaving the DayZ development team to start his own company in New Zealand. He said at the time that he would still consult with the company for a time.
For more information on DayZ on Steam Early Access, check the game's Steam product page.