Big Thunder
Play Big Thunder slot by Ainsworth for free in demo mode! Explore RTP, bonus rounds, and key features before playing for real.
Only 0.2% of slots combine 30 Paylines and Substitution Symbols.
The Slot Score is calculated from the visible data below. It is not affected by affiliate deals or paid placement.
Why this score
High confidence (86%)Five weighted signals shape the composite. Four context signals refine ties. See how we rate for the full methodology.
Popularity Proxy is a conservative derived signal. SlotRanker does not yet use live play telemetry for this category.
Compare Big Thunder with other games
 Big Thunder Score 64This game |  Jungle King Score 55 |  King Kong Cash Score 66 |  Magic Idol Score 63 |  Spinanga Score 57 | |
|---|---|---|---|---|---|
| Identity | |||||
| Studio | |||||
| Released | 10/13/2013 | 8/9/2021 | 5/10/2016 | 5/15/2014 | 10/10/2022 |
| Math | |||||
| RTP | 94.38% | — | 95.8% | 96% | 94.74% |
| Volatility | Medium volatility | Medium volatility | Medium volatility | Medium volatility | Medium volatility |
| Max win | — | 2,000× | — | — | 6,000× |
| Format | |||||
| Reels | 5 | 5 | 5 | 5 | 5 |
| Layout | 5x3 | 5x3 | 5x3 | 5x3 | 5x3 |
| Paylines | 30 | 50 | 20 | 10 | 20 |
| Min bet | 0.30 | 0.10 | 0.20 | 1.00 | 0.20 |
| Max bet | 3000.00 | 100.00 | 1.00 | 500.00 | 60.00 |
| Features | |||||
| Progressive | ✓ | — | — | — | — |
| Wild symbol | ✓ | ✓ | ✓ | — | ✓ |
| Free spins | ✓ | ✓ | ✓ | ✓ | ✓ |
| Scatter symbol | ✓ | ✓ | ✓ | ✓ | ✓ |
| Multiplier | ✓ | — | ✓ | — | — |
| Bonus game | ✓ | — | ✓ | — | — |
| Respins | — | — | — | — | — |
Every number is shown as a delta against Big Thunder.
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 | Big Thunder | 94.38% | |
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Questions & Answers
Big Thunder FAQ
Big Thunder offers a return to player (RTP) rate of 94.38%.
You can use virtual credits to play Big Thunder for free.
The mobile version of Big Thunder works smoothly, quickly, and looks great.
Yes, just select one of the casinos shown above to start playing Big Thunder with real funds.
You can't buy the bonus round in Big Thunder.
You can trigger Free Spins while playing Big Thunder.
Big Thunder is built on a traditional payline system, not Megaways.
A progressive jackpot is part of the bonus structure in Big Thunder.
