King under the Mountain was a pretty nice colony-building game from Rocket Jump Technology, and it was going through a huge upgrade. Sadly, their publisher cancelled on them so they're having to re-release as Mountaincore.
Read the full article here: https://www.gamingonlinux.com/2023/04/publisher-of-king-under-the-mountain-backs-out-so-its-re-releasing-as-mountaincore