Pragmatic Play dropped Sanatorium Secrets on 1 June 2026 and it is one of their darker releases in years. Grimy walls, spider-covered card symbols, doctors and patients staring out from the reels. Think Nolimit City's Mental series but from Pragmatic.
The game backs the theme up with real mechanics. Giant wilds with multipliers up to 64x. A Hook symbol that turns whole rows into wilds. A Puzzle round before free spins that can upgrade your bonus before it starts — or skip straight to the 10,000x max win if you complete it.
Sanatorium Secrets at a Glance
| Feature | Detail |
|---|---|
| Provider | Pragmatic Play |
| Release Date | 1 June 2026 |
| Grid | 6x4 |
| Ways to Win | 4,096 |
| RTP | 96.47% top setting |
| Volatility | Medium |
| Hit Frequency | ~30% |
| Min Bet | €0.20 |
| Max Bet | €240 |
| Max Win | 10,000x |
| Bonus Buy | 75x or 150x stake |
| Ante Bet | 2x stake — bonus 4x more likely |
How It Works
6x4 grid, 4,096 ways to win. Matching symbols just need to appear on adjacent reels from left to right — no specific positions needed. Around 30% of spins pay something, which is active for medium volatility.
Card symbols are low-paying. Four character symbols — doctors and patients — are the premiums. Get six matching premiums across all six reels and you win 1.5x to 10x your bet before any wilds or multipliers get involved.
The Wilds
1x4 Expanding Wild
Fills an entire reel — all four rows in one column. Lands on reels 2, 3, 4, or 5. Carries a multiplier of up to 8x.
2x4 Fiery Wild
Bigger. Covers both reels 3 and 4 at the same time — two full columns of wilds. Multiplier can reach 64x. When this lands alongside a win, you feel it.
Both wilds work in the base game and in free spins.
Hook Symbol
The most interesting symbol in Sanatorium Secrets. It only lands on reels 1 and 6. When it does, it looks at the row it is sitting in, turns every high-paying symbol on that row into a 1x1 wild, then turns itself into the same symbol.
So if a row has doctor symbols, the Hook turns them all into wilds and becomes a doctor. Combined with a multiplier wild already on the grid, that is a lot of value firing at once.
Bonus Game
Triggering
Three or more scatters on reels 2 to 5 triggers the bonus. You start with 6 free spins, plus 2 more for each extra scatter. Land a Super Scatter alongside three regular scatters and you get Super Free Spins, which guarantees two Hook symbols in both the Puzzle round and throughout the free spins.
The Puzzle Round
Before free spins start, a Puzzle respin round plays out. This is where things get interesting.
Puzzle pieces land during the respins. Each piece can:
- Unlock extra respins and free spins
- Activate Hook symbols
- Raise the minimum multiplier value for the upcoming free spins
The better the Puzzle goes, the better your free spins entry conditions. More pieces, higher multiplier floor, more Hooks active.
Complete the entire puzzle and the game skips straight to the max win of 10,000x. No free spins needed.
Free Spins
Once the Puzzle round ends, free spins run with the upgraded conditions. Everything carries over — minimum multiplier set, Hooks active, giant wilds still landing. Super Free Spins adds two guaranteed Hooks on top of all of that, giving you rows of wilds baked into every spin.
Bonus Buy
| Option | Cost | What You Get |
|---|---|---|
| Ante Bet | 2x per spin | Bonus triggers 4x more often |
| Bonus Buy | 75x stake | Randomly gives Free Spins or Super Free Spins |
| Super Buy | 150x stake | Guaranteed Super Free Spins |
At €0.20 minimum bet the 75x buy costs €15 and the 150x costs €30. The 150x is the better value if you want the top-tier feature — guaranteed Super Free Spins with two Hooks locked in.
RTP and Volatility
Top RTP is 96.47%. Casinos can also run it at 95.47% or 94.49%. Check the paytable at your casino before playing.
Medium volatility with a 30% hit frequency means you are winning regularly in the base game. Most of those wins are small. The big numbers come through free spins with multiplier wilds stacking and Hooks turning rows into wilds.
Max Win
10,000x. At €0.20 that is €2,000. At €240 max bet it is €2,400,000.
Two ways to get there. Complete the Puzzle round entirely and the game pays it out immediately. Or run Super Free Spins with the 64x multiplier wild landing across rows of Hook-generated wilds. The instant max win path through the Puzzle is the more dramatic of the two.
Our Verdict
Sanatorium Secrets is a well-built horror slot that does more than just look the part. The Hook symbol is genuinely clever. The Puzzle round adding a pre-bonus upgrade phase is something most slots skip entirely. And the instant 10,000x path through completing the puzzle is a memorable design choice.
Medium volatility, 96.47% RTP, ~30% hit rate. Accessible enough for regular sessions and atmospheric enough to feel different from the standard Pragmatic Play output.
If you want a dark, feature-rich slot that holds up beyond the theme, Sanatorium Secrets is worth your time.