Mithril cave environment

MITHRIL

The world remembers

Mine. Build. Survive.
A world shaped by time. Changed by you.

Dig Deeper

Procedural Caves

Every descent is different. Explore cave systems shaped by geological forces — no two expeditions are the same.

Geological Materials

From common basalt to legendary mithril. Each material has real physical properties that affect how you mine, what you craft, and how stable your tunnels stay.

Dormancy

Enter dormancy and let a million years of geology reshape the world around you. New minerals form, caves transform, and the mountain you wake up to isn't the one you fell asleep in.

Mining & Automation

Dig by hand. Then build machines that dig for you. Design pipelines that extract, process, and deliver while you push deeper.

Survival Combat

The creatures evolve with the world. Fallen enemies are claimed by geology during dormancy — silicified, opalised, turned to mineral. Those that survive come back stronger, and they remember what worked last time.

Structural Stress

Every block bears weight. Dig recklessly and the mountain reminds you who's in charge. Engineer your tunnels or lose them.

Try the Cave Generator Yourself

See Dormancy in action. Watch a million years of geology unfold in your browser.

Launch Web Viewer

Built From Scratch

Powered by a custom Rust voxel engine driving Unreal Engine 5.

Mithril's world runs on a bespoke voxel engine written in Rust—handling geology simulation, structural physics, and procedural generation at speeds that let UE5 focus on what it does best: making it all look incredible.

Open Source

Core engine code available on GitHub. Crates coming soon to crates.io.

Making Rust Unreal

A technical blog series on building a game engine that bridges Rust and Unreal Engine. Coming soon.

Join the Expedition

Mithril is being built by a solo dev from the ground up. Follow the journey, shape the world, be first to explore it.