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Mithril & Mud

A dwarven mining incremental. Build your hold and dig deeper every run.

An incremental mining game for Windows. Hire miners, build rooms, earn helpers that run the mine for you, then dig deeper than anyone should.

Wishlist on SteamStart the descent

In Early Access on Steam now. 1.0 coming soon.

Pip Mudbeard, the youngest miner in the hold, holding up a glowing mithril nugget
Dig down

Depth 1The Hold

How it plays

From one vein to a busy hold

You start with one ore vein and a pickaxe. Click the vein, hire Dwarf Miners, and build rooms around the cave. Soon the carts are rolling, the tavern is full, and your dwarves are asking where the next tunnel goes.

  • 13 rooms
  • 8 expedition destinations
  • 10 trade nations
How it starts: depth 3, five miners and the first three rooms around the ore vein.
Depth 3: five miners and three rooms.
A busy hold at depth 18: sixty miners around the glowing ore vein, every room staffed, mine carts and trade embassies.
Depth 18: sixty miners and every room busy.

Automation helpers, the Guild Hall and the Forge

Earn your automation

The Foreman, the Overseer, the Quartermaster, the Smeltmaster and more sign on as you progress. Each one takes a chore off your hands, and you can switch them on or off, save profiles, or pause them all.

  • Play actively, or let the hold run while you are away. Offline progress runs at the full rate, and a Welcome Back report shows what your dwarves did.
  • The Guild Hall gathers every screen of your hold. Pin your favourites to the bar.
  • The Forge: craft artifacts, cut gems and forge mythic upgrades, all in one place.
The Guild Hall: one screen that gathers every panel of the hold, with the Drowned Halls behind it.
The Guild Hall
The Forge screen: artifacts, gems and mythic upgrades in one place.
The Forge

Depth 20The Emberdeep

“The rock runs hot here. Seams of molten stone light the tunnels, and anything wooden chars before it reaches the lift.”

  • Twist Forge Heat
  • Warden The Cinderwyrm

Raids, dragons and Wardens

Something is knocking on the tunnel wall

Every descent costs more and pays more. Cave-ins block the way, and trolls and a dragon come raiding. Your Runic Warriors handle them.

  • Past depth 20, each biome has a Warden. Halfway through, it rises and fights like a dragon raid.
  • Wardens are tougher than dragons, but they drop Shadowsteel, Rune Shards and, the first time, a unique relic.
The Cinderwyrm, Warden of the Emberdeep, fights the hold at depth 25 between falls of lava.
The Cinderwyrm, Warden of the Emberdeep
Lithodore the dragon raids the hold at depth 16 while Runic Warriors fight it and the miners scatter.
Lithodore comes raiding

Depth 30The Drowned Halls

“An old dwarven city, flooded to the rafters. Boats move faster than feet, but ink runs in the damp.”

  • Twist Floodwater
  • Warden The Drowned King

Omens and challenges

New Dig, with an omen

Start a New Dig to earn Ancestral Knowledge and spend it on permanent blessings. Before each dig the elders read the stones.

  • Pick one of three omens (each gives something and takes something) or dig as usual. There are 14 to find.
  • Take on one of 5 challenges for Bronze, Silver and Gold medals. Medals teach your helpers new tricks.
  • Ascend for a second layer of permanent perks.
The Next Dig screen: three omens to choose from and the optional challenges.
The elders read the stones

Depth 40The Crystal Choir

“Every strike of a pick rings through the crystal. The whole cavern hums, and the walls answer.”

  • Twist Resonance
  • Warden The Choir Golem

Endless depths

The tunnels keep going

The main dig ends at depth 20 with a crown to forge. After that the tunnels keep going: the Emberdeep, the Drowned Halls, the Crystal Choir and the Hollow Dark, each with its own rule twist and its own Warden to beat.

  • The biomes cycle deeper and deeper, so there is always another depth.
  • 17 relics to find and equip, runestones to slot, and a 24-node skill tree bought with Rune Shards.
Depth 44 in the Crystal Choir: purple crystal spires around the ore vein and the rooms of the hold.
Depth 44, still digging

Depth 50The Hollow Dark

“No lantern reaches the far walls. Things live down here, and they have noticed you.”

  • Twist The Dark Hungers
  • Warden The Hollow Wyrm

The look, and a few secrets

Cozy, cartoony, a little mischievous

Big heads, chunky outlines and torchlight. Grumpy trolls, a dragon who wants your ore, and a hold full of dwarves who are very fond of each other.

  • 57 achievements, 4 of them hidden.
  • Poke around. The dwarves have a few secrets.
Depth 52 in the Hollow Dark, lit only by glowing mushrooms and the ore vein.
Depth 52, lit by glow-shrooms
The title screen with Pip Mudbeard holding up a mithril nugget beside the logo.
Pip, on the title screen

You have reached the bottom of the page.
The mine keeps going.

Wishlist Mithril & Mud and Steam will tell you when 1.0 lands. Can't wait? The Early Access build is on Steam today.

Wishlist on Steam

At 1.0 the same page sells the full game. Play the Early Access build now.

CommunityJoin the hold on DiscordShare your deepest dig, report bugs and see what is coming next.DevlogThe Road to 1.0October 27, 2026. Read the latest, or follow along by RSS.QuestionsRead the FAQLanguages, saves, offline progress, updates and how to report a bug.

Made to be comfortable

  • 15 languages
  • Colorblind palettes
  • Reduce motion option
  • Rebindable keys
  • UI scaling
  • Scientific notation
  • Steam Cloud saves
  • 3 save slots, export and import
  • In-game music player