The world has fallen. Rebuild it in...

Castle Digger

Built with love. Free to play. No strings attached.

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...scroll down to learn more.

Game Mechanics

What's this all about?

Castle Digger is a cozy incremental game about building your underground castle while uncovering the mysteries below. Send adventurers on quests, expand your fortress with new rooms, and dig deeper into the unknown. Start active, settle into idle — unlock new mechanics and watch your kingdom grow at your own pace. In time, you might even discover what happened to this world.

Sound interesting? Give it a try!
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Your people are waiting...
Adventures

“Your Majesty! There are ruins to loot, scary shadows to evade, and glory to misinterpret. Send us forth — on hundreds of quests, preferably the dangerous ones.”

Bernard
Collectables

“The realm attracts an impressive variety of individuals, Your Highness. Each with quirks, habits, and at least one troubling flaw. They are yours now.”

Eudocia

“History remembers the bold! The brave! The slightly reckless monarchs who dug holes without asking why? or should we stop?

King Reginald,
First of His Name
... for you to play this light-hearted game...
Base Building

“Name your dream, and we shall build it — deep underground. An excellent location. Very defensible. Almost impossible to escape.”

Cuno

“Got handed a disaster. Turning it into a very deep solution. Leadership!”

Queen Elena,
Daughter of Ezra the Wise
... about digging and building and collecting
and improving and discovery
and more. :)
Truly Idle

“Worry not, Your Majesty. You may rule anywhere, anytime. There is no stress, and the realm continues to prosper — even while you are absent.”

Roland

“Some rulers conquer lands. Others hoard gold. I? I have committed myself to the noble pursuit of seeing how far down this goes.”

Kofi,
Sovereign.
Frequently Asked Questions
Is Castle Digger really free?

Yes! Castle Digger is 100% free. Why? Because I want it so.

Where is the item shop?

There is no F2P item shop — and there never will be.

Where are the ads?

There aren't any ads — and there never will be. If you disable your ad blocker for this website now, you'll usually get a performance boost of around 30%, with no downside.

What type of game is Castle Digger?

Castle Digger is an idle and incremental game where you rebuild an underground empire after a cataclysmic event. It focuses on strategic resource management, base-building, and hero development.

Do I need to download anything?

No download required! Castle Digger is a browser-based game that you can play directly in your web browser. Click here to play.

Do I have to register an account?

No. There is no account registration. When you start a new game, you will be handed a key to your castle. Take care of that key. Maybe even create a bookmark (the key is in the URL) or write it down on a piece of paper.

I have lost my castle key.

Time to start over. :-(

Try checking your browser history — the code is in the URL.

Cookies?

No cookies.

The Herald

Privacy

What is there to say? The game runs locally on your computer, but saves are synchronized with my web server. I will sometimes look at some of those saves to improve the game.

Notable events in your castle are shared as text messages with the discord community. This includes your custom ruler and castle name. This can be disabled in the options.

I do need to handle your IP address for some time as a technical necessity when you access the website. This is how the internet functions.

I will also collect a unique identifier (anonymized) and user agent (the name and version of your browser) for automated error reports should one occur, so I can detect and fix bugs. The report is for my eyes only and will be deleted as soon as possible. This can be disabled in the options.


I do not handle any personal information apart from a few technical things as written above. You cannot register an account.

There is no web analytics and there are no cookies here.

Hope you have fun! :)

About Me

Hello there! My name is Tarte, also known as stated below. I created this game as a passion project.

If you found a bug or have any other feedback, please send me a message.


Contact information:

Simeon Guthier
55122 Mainz
Hegelstraße 45
guthier.online@gmail.com