Mithril Brings First-Person Mining and Automation to Steam on December 8
The underground mining game features procedurally generated caves where removing too much material can trigger cave-ins.
Mithril, an underground first-person automation and mining game, will launch on Steam on December 8, 2026, according to gamerant.com. A demo is available on Steam now, though it does not include all of the game's features.
The game places players in procedurally generated caves with simulated geology. Removing too much material can trigger cave-ins, which players will have to account for as they dig.
Mining feeds into an automation layer: players can transform rock using lava and water to create new minerals, then build pipelines using crushers, furnaces, conveyors and storage.
Mithril supports solo play and four-player co-op. It also offers a Freeplay mode without hostiles for players who want to focus on extraction and production rather than combat.
Comparison points
The game arrives in a space that includes established titles such as Deep Rock Galactic, the co-op FPS from Ghost Ship Games featuring the Glyphid aliens, and Satisfactory, the automation game that saw massive success in October 2025 and prompted many indie developers to try their own spin on the automation genre.
Quick answers
When does Mithril release on Steam?
Mithril releases on December 8, 2026.
Is there a Mithril demo?
Yes. A Steam demo is available now, but it does not include all of the game's features.
Does Mithril have co-op?
Yes. It supports solo play and four-player co-op, plus a Freeplay mode without hostiles.