Downshaft

Downshaft is a slow, quiet idle game about a mine that never stops going down.

Strike the rock, hire a crew, and let them dig. Every measure of ore pushes the shaft deeper, and every new stratum - Subsoil, Glacial Till, Limestone Karst, Granite Root, all the way to the Inner Core - multiplies the whole operation above it.

Then you bring the tunnels down on purpose.

Six prestige layers, each with its own idea.

• Collapse the shaft for Crystal Cores and spend them on the Shoring Ledger - six ranked upgrades you can buy again and again.
• Reforge in the Magma Sea and melt your shards into alloys at the Alloy Forge. Three slots, six alloys, and a different loadout for every phase of a run.
• Fracture the core and spend Fracture Points on a three-branch build that ends in choose-one capstones. Clear and refund whenever you want to try another route.
• Compression, Ascension, and Eternity lie deeper still. They're playable today and getting their own mechanics in coming updates.

Built for people who actually like idle games.

• Runs at real speed. No time-warp, no speed-up buttons.
• Always-on offline progress (12 hours to start, upgradeable to unlimited).
• Every prestige is manual. The game never resets you.
• Auto-buy and auto-spend are earned through play, not handed out.
• 35 Feats, each a permanent +2% ore, through every reset.
• Export/import save codes. Your progress is yours.

Free, in the browser, no account. Feedback is very welcome - this is the first public build and the deeper layers are being shaped by what players ask for.