claudium
We make small games, and the tool that makes them.
Claudium is two things at once. A studio shipping browser games, and Claudium Engine — the workshop those games are built in, where you describe a change in plain words and watch the game reload while you are still reading the reply.
The games, and what they are made with.
Neither exists without the other. The engine gets sharper because a real game keeps finding its edges; the games get made faster because the engine stopped being in the way.
Card Idle
A dark fantasy idle deckbuilder. Nine slots, 113 cards, and neighbours that quietly change what each other is worth. Free, in your browser.
See the games →
engineClaudium Engine
A desktop workshop with Claude living in it. Chat, code and a live game, side by side. Exports one HTML file that runs anywhere.
See the engine →
Say it, see it, keep it.
Describe the change
Not a ticket, not a prompt template — a sentence. “Make the sparks orbit on an ellipse and give me a knob for how fast they swing round.” The code pane shows exactly what changed, line by line, and one button puts it back.
Watch it run
The preview reloads the moment the file is written. Numbers the game exposed become sliders you can drag while it plays — no reload, no rebuild, no guessing at a value and running it again.
Ship one file
Export writes a single HTML page, or a folder with real assets beside it. It opens by double-clicking, needs no server and no network, and uploads to itch.io as-is.
Card Idle
A dark fantasy idle deckbuilder. Most idle games ask you to buy a bigger number; this one asks you where to put things. Nine slots, 113 cards, and every card changes the ones beside it.
Come and say something.
Card ideas, bug reports, screenshots of a board that got out of hand — the server is where the next build gets argued about before it exists.