Sanatorium Secrets
Sanatorium Secrets by Pragmatic Play is a mystery-themed slot that utilizes 1x4 and fiery 2x4 expanding wilds with multipliers reaching up to 64x. The base game includes Hook symbols on the first and sixth reels that transform high-paying symbols on the same row into wilds. Landing scatters triggers a two-part bonus starting with a puzzle respin game that determines the minimum wild multiplier and modifiers for the subsequent Free Spins or Super Free Spins round.
RTP published by the studio / Sanatorium Secrets
96.47%
Scale starts at 95% · other versions not published
Figures: Pragmatic Play game page, Pragmatic Play demo game, checked October 5, 2026; each value is linked to its page in the game facts table. Artwork © Pragmatic Play; image file from the Slots-Info slot database, not supplied by the studio.
10,000×
Max win, × stake
1
RTP version published · others not published
Yes
Bonus buy
Game facts
| Metric | Value |
|---|---|
| Studio | Pragmatic Play1 |
| RTP versions | 96.47%1 |
| Other RTP versions | Not published by the studio |
| Volatility | Not published |
| Max win | 10,000× stake2 |
| Bet range | Not published by the studio |
| Layout | Not published |
| Features | Expanding Wild Multipliers, Hook Symbols, Free Spins, Puzzle Respin Bonus, Super Free Spins, Ante bet1 |
| 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
Pragmatic Play publishes one RTP setting for Sanatorium Secrets: 96.47%. Other RTP versions are not published by the studio. 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 |
|---|---|---|---|
| 96.47% (highest) | 3.53% | $96.47 | — |
House edge = 100% minus RTP. RTP is a long-run average across all players, not a prediction for a session.
Features
- Expanding Wild Multipliers
- Hook Symbols
- Free Spins
- Puzzle Respin Bonus
- Super Free Spins
- Ante bet
Where it’s available
Not confirmed. Availability in regulated North American markets is not confirmed yet.
Regulated markets only; availability varies by casino.
