from the makers of Bellchain
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Dig your wayto gold.

Dig tunnels, blast gold, raise a base with a flag. The digging game in the spirit of Clonk, right in your browser.

Play free now Read the docs
Game scene from Goldmine: a wooden hut with a waving flag, trees, and below it earth with rock, gold and a tunnel where a digger is at work. Real scene from Goldmine
  • Dig
  • Blast
  • Build
  • Chop
  • Rescue
Before · After

A meadow becomes a mine.

Same spot, same view. In between: your crew.

Before: the untouched meadow of Goldmine with trees, below it earth, rock and gold veins.
After: the same spot with a sawmill, a hut with a flag, a windmill and an elevator, below them a shaft, tunnels, a lorry and blasted gold veins.
First morning A few hours later
  • Shaft
  • Tunnels
  • Blast craters
  • Power
  • Home base
From the sky into the deep

A world you dig up pixel by pixel.

Scroll down and dig your way through.

Raise the flag. Hear the till.

Carry the flag into your hut and every bit of gold that comes in turns into money.

How the base works

Build. Wire up. Done.

Place a site, haul wood and metal, switch on the windmill.

How building works
Settlement with sawmill, hut, windmill and elevator, connected by power lines
Windmill turning in the wind

Castles that snap together.

Walls, towers and drawbridges fit together like building blocks.

Building castles
Castle of stone walls, towers and a staircase with office and flag
Keep

Wipfs, monsters, zaps.

Rescue the wipfs. Dodge the monsters. Leave the zap nests alone.

All animals
A wipf runs across the meadow, a bird flies
Rescue the Wipfs
Wipf
Monster
Bird
Fish

One button. Straight down.

Your digger burrows diagonally through earth, sand and coal.

Learn to dig
A digger digs a diagonal tunnel through the earth
Digging

One flint. Gold flies.

Rock and gold only give way to explosives. The lorry hauls the nuggets up.

Learn to blast
A flint explodes in a gold vein, gold nuggets fly
Boom.
Your crew

From Digger to Chancellor.

Everyone has a name, gains experience and climbs the ranks. A trumpet celebrates every promotion.

  • Ace, Lieutenant Ace Lieutenant
  • Nova, Sergeant Nova Sergeant
  • Hex, Private First Class Hex Private First Class
  • Ziggy, Digger Ziggy Digger
  1. Digger
  2. Private
  3. Private First Class
  4. Corporal
  5. Sergeant
  6. Ensign
  7. Lieutenant
  8. Captain
  9. Major
  10. Colonel
  11. General
  12. Field Marshal
  13. Admiral
  14. Fleet Admiral
  15. Secretary of State
  16. Chancellor

All ranks and abilities

Buildings

Every building works.

Saws saw, chimneys smoke, the windmill turns. All real sprites from the game.

  • Wooden hut
  • Sawmill
  • Foundry
  • Workshop
  • Windmill
  • Elevator
  • Chemical factory
  • Power plant
  • Pump
  • Oil derrick
  • Watchtower
  • Counting house

Every building in detail

Scenarios

Five rounds to get started.

From the guided tutorial to the castle battle. Every scenario has a start, a goal and rules like the original.

New? Start here

The Basics

Start
1 digger, wood, 260 money
Goal
Ten lessons: walk, dig, chop, hut, flag, elevator, windmill, gold
Classic

Goldmine

Start
Hut with flag, 50 money
Goal
Mine and sell all the gold
Animals

Rescue the Wipfs

Start
Small crew, office
Goal
Collect and sell every wipf
Combat

Keep

Start
Castle with office, castle plans
Goal
Destroy the AI opponent’s office
Free play

Sandbox

Start
Plenty of money and material
Goal
None. Build whatever you like.

Goals and rules of every scenario

Where can I play?

Anywhere a browser runs.

On PC and Mac, on phones and tablets, with a gamepad. Or as an app with its own icon that also works offline. No download, no account, no app store.

  • PC and Mac

    Chrome, Edge, Firefox or Safari. Keyboard and mouse, right click for the context menu.

    Browser

  • Phone and tablet

    Touch with a stick and big buttons on phones, an action bar on tablets. Best in landscape.

    Touch

  • Gamepad

    Plug in an Xbox or PlayStation controller and go, on computers, tablets and phones.

    Layout

  • Install as an app

    Chrome and Edge: install icon. Android: Install app. iPhone and iPad: Share → Add to Home Screen. Mac: File → Add to Dock.

    Step by step
Undermine Squad on a phone in landscape: crest, money and menu at the top, the Dig, Jump and Throw buttons bottom right.
On a phone
Diagram: iPhone with Safari, “Add to Home Screen” highlighted in the share sheet.
As an app, also offline

Every device and step in the docs

Wide view of Goldmine at original size: meadow with hut and trees, below it earth, rock, coal, gold and caves
Original size, like back then
The story

Inspired by Clonk. Rebuilt for the browser.

The flag on the hut, the ring of the till, the one flint too many: since 1994 Clonk has shaped a whole generation. Undermine Squad brings that feel to the browser, with its own pixel art, its own code and rules as close to the original as possible.

Thanks to RedWolf Design, the LegacyClonk team and the OpenClonk project. Without their open source code and content this game would not exist.

“Clonk” is a registered trademark of Matthes Bender. Undermine Squad is an independent game and not affiliated with the rights holders.

  1. 1994Clonk is released
  2. 2008Clonk Rage by RedWolf Design
  3. 2009 –OpenClonk and LegacyClonk keep the scene alive
  4. 2026Undermine Squad: free in the browser
Credits

Made with lots of love and open sources.

Game, art, website
Undermine Squad
Music
K-Pone (Martin Strohmeier), OpenClonk, CC BY 3.0
Sound effects
OpenClonk Sound.ocg, CC BY 3.0, various authors
Engine algorithms
Clonk Rage, LegacyClonk and OpenClonk, ISC License

All credits →

Questions

Quick answers.

Is Undermine Squad free?

Yes. Playing costs nothing, you need no account, and there are no ads and no in-game purchases. If you like, you can support the server and further development with a voluntary donation.

Do I need to install anything?

No. The game runs right in an up-to-date browser at undermine-squad.com/spielen/. Saved games and your crew live in the browser’s storage; you can back up the crew as a file.

Does it work on phones and tablets?

Yes. On phones and tablets you steer with a stick under your left thumb and buttons on the right, best in landscape. With “Add to Home Screen” Undermine Squad installs as an app and starts offline after the first round. A gamepad works too.

Is this Clonk?

No. Undermine Squad is an independent game inspired by Clonk, with its own code and its own pixel art. Rules and values follow the open source code of Clonk Rage and LegacyClonk. “Clonk” is a registered trademark of Matthes Bender; Undermine Squad is not affiliated with the rights holders.

Which languages are available?

The game, the website and the docs are available in English and German.

Who is behind it?

The team behind Bellchain (bellchain.app). Undermine Squad is a passion project and is meant to stay free.

More answers in the docs

Ready to dig?

One click and you are standing on the meadow with your first digger.

Play free now Read the docs first