18+ For entertainment only No real money play No prizes of monetary value No in-app purchases
before the dome opens
Every instrument here is free and runs on stardust. Stardust cannot be bought, sold or exchanged, and there are no prizes of monetary value.
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The games here are for adults only. If gambling or gaming is worrying you or someone close to you, GamCare's free, confidential helpline is open day and night on 0808 8020 133.
close the shutters
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a note from the hall
In that time you have played 0 rounds, and your stardust has moved by 0. Stardust is only points, but time is real.
A note on storage
Orrery Hall sets no cookies and runs no trackers or adverts. Your age answer and this choice are kept in this browser. Accept, and your stardust and Logbook stay on this device; choose Session only, and they are forgotten when you close the tab. How storage works
10stake
Choose a stake to begin.
Five reels of four crystals each, paid by ways. Winning crystals vanish, new ones fall into place and the multiplier climbs from ×1 to ×5 for as long as the falls keep paying.
A glass case of crystals with weather inside them. Wins are frequent and small, and the falls are the point: each one nudges the multiplier up a step.
Free rounds are rare, roughly once in a couple of hundred rounds, and they carry the larger results.
Long-run return is what the game gives back on average over millions of rounds, checked by simulation. Any single evening can land far above or below it.
These are the exact numbers the game uses. Every round is drawn fresh by your browser's secure random number generator, and nothing that happened before changes what happens next.
Returns are multiples of your total stake for each way. Two ways with the same symbol pay twice.
| Symbol | 3 reels | 4 reels | 5 reels |
|---|---|---|---|
 Gold nebula | × 0.128 | × 0.319 | × 1.065 |
 Crimson nebula | × 0.106 | × 0.213 | × 0.639 |
 Violet nebula | × 0.085 | × 0.213 | × 0.426 |
 Magenta nebula | × 0.053 | × 0.106 | × 0.266 |
 Teal nebula | × 0.043 | × 0.085 | × 0.213 |
 Emerald nebula | × 0.021 | × 0.053 | × 0.128 |
 Sapphire nebula | × 0.021 | × 0.043 | × 0.106 |
Multiplier for each fall in a round: × 1, ×2, ×3, ×5 (then stays). In free rounds: × 2, ×4, ×6, ×10.
Star crystal: 3, 4 or 5 anywhere return × 0.4, × 1 or × 4 and start 8 free rounds.
