Mithril

Mithril is a procedurally generated voxel mining survival game built around cave-collapse physics and simulated geology. You dig through caves for ores and minerals, support tunnels against structural stress, and manipulate water and lava to change the rock. Every stone you remove and every flow you redirect affects the cave.

Mine and shape the caves

Structural stress spreads through the rock in real time. Remove too much too quickly and the cave can collapse; build struts to support your tunnels. Destruction ranges from entire caverns giving way to mining keyholes around individual ores.

When you trigger Dormancy, the game simulates a million years of geological change in the cave around you. Water carries minerals and concentrates ores along ancient water tables, while lava heats untouched rock and transforms it into new minerals. Unsupported tunnels can collapse under their own weight. These changes are driven by what you do, and the ore you need may not exist until you reshape the cave.

Build your production chain

You can design systems that extract, process and deliver materials as you push deeper. Build with crushers, furnaces, conveyors and storage, and use Orehands to keep production moving while you are elsewhere. You can also feed one production chain into another.

The cave's geology

Procedurally generated cave systems contain depth-layered rock strata and simulated geological processes. The caves include mineral formations, veins and enrichment, as well as stalactites, columns, flowstone, crystal growths, lava pools and water systems. Each material has physical properties that affect how you mine it, and every descent is different.

Creatures and Dormancy

Creatures in the dark watch how you dig, build and fight, then learn from your actions. Those that die are claimed by deep time and become silicified or opalised within the stone. Creatures that survive Dormancy return with knowledge of what did not work before.

Co-op and freeplay

Online and local co-op support up to four players. Freeplay leaves out the creatures, so you can focus on the cave, its geology and its machines, though the cave can still collapse.