The sandbox zombie survival game CastleMiner Z is still the best-selling game on Xbox Live Indie Games, and now it's pushed over 1 million copies in only 10 months.
DigitalDNA's voxel game allows players to build and mine a hostile world, crafting items such as guns and ammunition out of materials in the environment.
Thomas Steinke designed the original, CastleMiner, and released it in 2011, quickly following up with the sequel that same year.
In addition to the two CastleMiner games, developer DigitalDNA has a third successful game on the platform: Avatar Laser Wars 2.
CastleMiner Z costs 80 Microsoft Points on XBLIG.
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