Galaxy Miner
Play Galaxy Miner online: mine Stardust, automate a space economy, manage Heat Flux, catch Golden Comets, and reset for permanent Dark Matter upgrades.
Galaxy Miner gameplay
Galaxy Miner is the flagship space mining idle clicker on SpaceClickerGame.com. Start with manual Stardust extraction, then reinvest into Laser Drills, Mining Drones, Rovers, Lunar Bases, Orbital Stations, and Dyson Swarms. The loop shifts from active clicking toward automated production as the run grows.
Heat Flux and active mining
Every manual mining action adds Heat. Keeping Heat between 80% and 99% activates the 2x Heat Flux state, while crossing 100% overheats the mining beam and temporarily disables normal mining. Geodes can vent Heat, so active play rewards timing rather than simply holding the input.
Planet progression and production multipliers
The run starts on Proxima Centauri B at 1x production. Reaching 1 million Stardust unlocks Kepler-186f at 10x production, 1 billion unlocks Trappist-1e at 50x, and 1 trillion unlocks the Galactic Core at 200x. Once a planet is unlocked in the current run, spending Stardust does not move the run backward.
Automation and offline production
Automatic upgrades continue producing Stardust without repeated clicks. Supported saved runs can also credit capped offline production after time away, using the saved automation rate rather than pretending the game ran continuously in the background.
Local save and portable backup
Galaxy Miner auto-saves to local browser storage. The Telemetry & Backup panel can copy a portable Base64 save code or download a .scg backup file, and either format can be restored manually after validation. These backups are not cloud sync or encryption.
Keyboard controls
On desktop, Space fires the mining laser, number keys 1 through 8 quick-buy the eight standard upgrade tiers, P toggles the Dark Matter prestige chamber, S toggles Telemetry & Backup, M toggles game audio, and H or ? toggles the hotkeys reference. When a form control or backup textarea has focus, gameplay shortcuts do not intercept typed input.
Galactic Reset and Dark Matter
Galactic Reset first awards 1 Dark Matter at 40 billion current Stardust; 1 trillion awards 5. A reset removes current Stardust and standard upgrades but keeps Dark Matter, permanent Void Technology, and lifetime progress. Larger runs can award more Dark Matter, so reset timing becomes a long-term efficiency decision.
For upgrade planning, see the Space Clicker strategy guide or track thresholds on the Galaxy Miner milestones page.
Reviewed against the current browser build: 2026-10-28
What makes this game different?
Use this checklist after a purchase, a break, or a reset when the resource panel behaves differently from what you expected. The figures below describe this build; they are calculation examples rather than measured completion times.
A producer milestone affects every unit in that tier. At 24 Mining Drones, base output is 48 Stardust/s; the 25th doubles the tier to 100/s. Its added output is 52/s before planet, Dark Matter, technology and Heat Flux multipliers. Check the next unit count before comparing purchases.
Galactic Reset uses current Stardust: floor(5 × sqrt(Stardust / 1 trillion)). It awards 1 Dark Matter at 40 billion, 5 at 1 trillion, and 10 at 4 trillion. Lifetime Stardust in the milestones tracker does not determine this reward. The live reset preview is the final check before confirming.
Decision guide
| Situation | Practical action | Why |
|---|---|---|
| Production falls without losing units | Check Heat Flux and compare the same Heat state | The active 2x bonus ends as Heat cools. A lower rate alone does not mean the save lost an upgrade. |
| Lifetime total is large but reset reward is small | Read current Stardust and the live Dark Matter preview | Spent Stardust still contributes to lifetime statistics but is unavailable to the reset calculation. |
| Returning gives no offline income | Check for purchased automatic producers and the saved state | Manual click power alone does not produce offline Stardust. Credit is capped at 24 hours and depends on saved automation. |
Beginner plan
- For the first upgrade, Laser Drill costs 15 Stardust and adds 1 base output per click; Mining Drone costs 50 and adds 2 base Stardust/s. Choose according to whether you will keep mining or leave the game.
- At 10 Drones and no Rovers, the next Drone costs 309 for +2 base Stardust/s, while the first Rover costs 350 for +15/s. With 350 available, the Rover has the shorter incremental payback before bonuses.
- Export a portable save code or .scg file from Telemetry & Backup before a reset or device change. Store it outside this browser before clearing site data.
- Before confirming Galactic Reset, check what clears: current Stardust, ordinary upgrades, current planet and Heat. Dark Matter, purchased Void Technology and lifetime statistics remain.
Limits and save behavior
Galaxy Miner is a browser game, not a cloud service. Progress is stored locally unless you export a portable backup. Offline production is capped and calculated from saved automation state; it is not a hidden background process that runs indefinitely.