Sales of the standalone DayZ game have now passed 2 million, according to creator Dean Hall.

That's up some 300,000 copies from the 1.7 million sales publisher Bohemia Interactive announced in March. The latest sales milestone has been hit within six months of the game's release, said Hall via the Twitter announcement, although it's actually less than five months since the game first hit Steam.

"Just over 2 years ago the DayZ mod released. Today, the Standalone game just broke 2 million units in under 6 months," said Hall.

The standalone alpha version of the perma-death zombie survival game released on Steam Early Access and via Bohemia Interactive's online store on December 16, 2013.

The game quickly hit 172,500 in the game's first 24 hours of availability and had topped 800,000 sales by January 6, according to the game's developer.

In March, Hall announced that the team working on DayZ was 'effectively doubling' as he made preparations to leave the project by the end of 2014.

The game is available to buy on Steam for a cost of 19.99 / 23.99 / $29.99.