Core Keeper is apparently a keeper, as Fireshine Games announces the mining sandbox adventure has now sold over a million copies since entering Early Access in March. Here's more on this indie success story:

We’re delighted to announce that, shortly after the launch of The Sunken Sea Update - our first major content update - Core Keeper hit 1,000,000 sales. This is a momentous occasion for us as developers and for our publisher, Fireshine Games. In fact, Core Keeper previously set the record for being Fireshine Games’ fastest-selling digital game of all time by selling 100,000 copies within its first two days of Early-Access launch.

We’re truly overwhelmed by the fantastic community response that Core Keeper has had, and we’re thrilled to have hit this milestone so early on in the games’ development. Launching in Early Access has given us a unique opportunity to involve the community in major game decisions and collaborate with them on improvements and optimisations.