About This Game

Mithril is a procedurally generated voxel mining survival game. Infinite caves to explore, where each world changes with you. Every stone you touch, every flow of lava you manipulate, all has consequence.

Dig by hand. Build factories to process it for you. Survive what hunts you.

Then trigger the Dormancy, a deep sleep, and watch a million years of geology reshape the cave around you.

Every Stone Bears Weight

Every piece of rock you take, another has to carry what is left. Take too much, too fast, and it all comes down.

Structural stress propagates through the rock in real time. Support your tunnels with struts, or listen to the ceiling make the decision for you.

The stone is not known for forgiveness.

(Unscripted natural collapse event.)

A Million Years in Minutes

Dormancy is not a rest. It is a fast-forward.

The engine simulates deep geological time live on the cave you are standing in.

Open a path for water and the minerals it carries follow it, concentrating ores along ancient water tables. Channel lava into untouched rock and hydrothermal heat transforms it into new minerals. Leave a tunnel unsupported and it gives way under its own weight. Every change is player driven, the world is yours to manipulate.

You shape it. You trigger it. You watch it happen. And then you come back to a place you no longer recognise.

But you will do it anyway. The ore you need does not exist yet.

Same base. New danger.

(Deep time simulation of heat source turning into new minerals.)

Destruction at Every Scale

From entire caverns collapsing, to mining keyholes around ores, destruction happens flawlessly across any scale.

The Memory

The world is not the only thing that changes. 

While you play, creatures in the dark watch you. And they learn. Where you dig. What you build. How you fight.

The ones that survive Dormancy come back knowing what didn’t work last time. 

Dormancy reshapes the world. The Memory reshapes what hunts you.

Real Geology

The cave was generated. The geology was simulated. 

• Depth-layered rock strata across procedurally generated cave systems

• Geologically accurate mineral formation, veins, and enrichment

• Stalactites, columns, flowstone, crystal growths, lava pools, water systems

• Every material has real physical properties that change how you mine it

Every descent is different.

Build The Chain

Start with your claws and a torch. Finish with a line of machines pulling ore out of the dark while you work three tunnels over.

• Crushers, furnaces, conveyors, storage

• Orehands that keep the line moving while you are elsewhere

• Build the chain, then build the chain that feeds the chain

None of it survives Dormancy untouched. You do not build the line once.

Same Caves. Now With Friends

Online and local co-op for up to four. One of you digs. One of you watches the dark.

Arrives at launch.

The Quiet Version

Freeplay leaves out the creatures and gives you the cave, the geology, and the machines.

Arrives at launch.

Built From Scratch

Powered by a custom Rust voxel engine driving Unreal Engine 5. Built by a solo developer in Melbourne, Australia.

AI Generated Content Disclosure

The developers describe how their game uses AI Generated Content like this:

Mithril uses generative AI in much of its art and audio. This includes 3D models, textures and materials throughout the game — cave and terrain surfaces, environment art and interface textures — 2D item and UI icons, store page and marketing images, music and sound effects. All of it was edited and finalised by hand against the game's art direction.

No AI-generated voice is used, and no generative AI runs while you play — the game generates nothing at runtime.

Not AI-generated: world generation (hand-written procedural algorithms, not AI), model animations, game code, and level and systems design.