Beast Below
Beast Below by Hacksaw Gaming is an underwater-themed slot set on a 5x4 grid with 14 paylines. In the base game, expanding wild Sirens offer multipliers up to 200x. The game features two main bonus rounds: The Sirens' Call Bonus with nudging Pink Sirens, and the Down Below Bonus where expanding Wild Divers roam the grid while managing their oxygen charges.
Highest published RTP / Beast Below
96.29%
Scale starts at 87% · casino picks the version
Figures: Hacksaw Gaming game page, checked October 5, 2026; each value is linked to its page in the game facts table. Artwork © Hacksaw Gaming; image file from the Slots-Info slot database, not supplied by the studio.
10,000×
Max win, × stake
4
RTP versions published by the studio
88.28%
Lowest published RTP
Yes
Bonus buy
Game facts
| Metric | Value |
|---|---|
| Studio | Hacksaw Gaming1 |
| RTP versions | 96.29% / 94.27% / 92.25% / 88.28%1 |
| Volatility | Very high1 |
| Max win | 10,000× stake1 |
| Bet range | €0.10 – €1001 |
| Layout | 5x4 · 14 Paylines1 |
| Features | Expanding Sirens, The Sirens' Call Bonus, Down Below Bonus, FeatureSpins™1 |
| Bonus buy | Yes2 |
| Release date | Not published by the studio |
Numbers link each value to the page it comes from. “Not published” means the studio does not state it; we add it when it does and never estimate a spec. Figures from casino sites are not used.
RTP versions
Hacksaw Gaming publishes 4 RTP settings for Beast Below and each casino chooses one. Over very long play, the 96.29% version returns $96.29 per $100 staked; the 88.28% version returns $88.28. Check the game’s help or paytable screen at your casino to see which version it runs.
| RTP version | House edge | Return per $100, long run | vs highest |
|---|---|---|---|
| 96.29% (highest) | 3.71% | $96.29 | — |
| 94.27% | 5.73% | $94.27 | −2.02 pts |
| 92.25% | 7.75% | $92.25 | −4.04 pts |
| 88.28% | 11.72% | $88.28 | −8.01 pts |
House edge = 100% minus RTP. RTP is a long-run average across all players, not a prediction for a session.
Features
- Expanding Sirens
- The Sirens' Call Bonus
- Down Below Bonus
- FeatureSpins™
Very high volatility Volatility is set by the studio and is the same at every casino — unlike RTP.
Where it’s available
Not confirmed. Availability in regulated North American markets is not confirmed yet.
Regulated markets only; availability varies by casino.
