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King under the Mountain
A simulation-based settlement-building strategy game set in a fantasy world - build and grow from a humble colony to control of your own kingdom!
What players say
Steam review score and the most-helpful voices, which may include critical ones. Score via Steam as of 2026-09-28.
“I bought this game maybe an hour after it launched but I couldn't get it started. I went to the discussions to ask for help and the developer worked with me personally to get it launched. I ended up going to the discord server to continue troubleshooting and he ended up…”
— a player, Steam review · 13 hrs played“A complex but charming settlement builder in the vein of RimWorld or Dwarf Fortress. I've had a good time with my first few runs and would recommend if you don't mind some interesting bugs and frustrations - the game is still very early. There are good bones here for a game that…”
— a player, Steam review · 13 hrs played“Currently, you are paying to be a playtester in a VERY early game. Great game idea but not enough development just yet. If they follow their roadmap, this will be a lot of fun. Problems I encountered that make the game very difficult to play as is: - Many resources are currently…”
— a player, Steam review · 10 hrs playedLatest official news
Developer announcements via the Steam news API — links go to the original posts. More across all games on the news hub.
King under the Mountain released as open-source, Mountaincore dev on hold
2023 was a tumultuous year for Mountaincore - we were made to keep the community in the dark by a publisher which ultimately backed out, scrambled to release the game according to the plan that had be
Mountaincore Early Access Release!
Dear King under the Mountain players! If you've missed the updates recently, King under the Mountain has been massively reworked and re-released as Mountaincore ! As an owner of King under the Mountai
Mountaincore granted to all King under the Mountain owners
Hi everyone, thank you for your patience while we got this resolved with Steam support - all King under the Mountain owners should now have Mountaincore in their library! If you haven't already, I rec
What's Next for King under the Mountain
Hi everyone! It’s finally time to talk about what’s going on with us (Rocket Jump Technology) and King under the Mountain . As you might have seen in our previous updates, nearly a year ago we started
Huge news on the future of King under the Mountain
Hi everyone, Sorry it's been so quiet for so long with no news about what's happening with King under the Mountain. It's been brewing for a long time, but I'm absolutely delighted to announce that I'm
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Screenshots
Official Steam store screenshots — click any shot to enlarge.
Facts & details
From the Steam store record, snapshot 2026-09-28.
| Genres | Indie, RPG, Simulation, Strategy, Early Access |
| Player tags | Early Access · Colony Sim · Base-Building · City Builder · Management · Relaxing · Building · Strategy · Survival · Procedural Generation · Simulation · Mining (SteamSpy community voting) |
| Features | Single-player · Family Sharing |
| Languages | English, Italian, German, Spanish - Spain, Japanese, Simplified Chinese |
| Official site | http://kingunderthemounta.in |
Minimum system requirements (PC)
Minimum: Requires a 64-bit processor and operating system OS *: Windows 7 64-bit Processor: Intel Core2 Duo 2.4Ghz or Higher Memory: 8 GB RAM Graphics: Intel HD Graphics 3000 Storage: 1 GB available space