Boomstone: Build a Vein, Blast It, Clear Eight Layers
📚 Game Guides: games picked by genre, one page each
What is Boomstone?
Eight stones appear on the mine wall each turn, and every stone carries a colour and a purity value. You line up matching colours into a vein and then blast it. The purer the vein, the more your score multiplies, and clearing eight layers means the mine is fully worked out.
How to play
Pick stones of the same colour from the wall, build them into a vein and set it off. The payout grows with the number of stones in the vein and with their purity, so two pure stones often beat three cloudy ones. At the end of each layer you choose equipment at the supply point: tools that add bonus points to one colour, double the blasts of a matching colour or strengthen your final shot. Anomalies at the close of a layer shut off a colour or swallow one of your blasts, so read the preview and change your plan.
Controls
| Key | Action |
|---|---|
| Left click | Pick a stone and blast the vein |
| Touch | Tap stones to build a vein on a phone |
Tips
- Watch which colour you tie your supply point equipment to; while that colour keeps showing up in the next layer, the score snowballs.
- When a layer end anomaly shuts off a colour, stop pushing for a long vein - a short one that ignores that colour pays better.
- Add your low purity stones at the end of a vein rather than the start, because the total multiplier drops less that way.
Frequently asked questions
How long does a run take?
A full run of eight layers takes around twenty minutes, and you can stop wherever you want.
Does every game play out the same?
No. The equipment at the supply point and the layer end anomalies are reshuffled every run.
Do I have to download anything?
No. The game opens straight in your browser.