Sanatorium Secrets
Sanatorium Secrets is a horror-themed Pragmatic Play slot that leans into eerie mystery, haunted imagery, and feature-heavy gameplay rather than simple reel-spinning. The game plays on a 6x4 layout and mixes expanding multiplier wilds with a two-part bonus sequence built around a puzzle respin setup and a follow-up free spins round.
In both the base game and bonus game, 1x4 expanding wilds can land across reels 2-5, carrying multipliers of up to 8x. On top of that, fiery 2x4 wilds can appear on reels 3 and 4 with multipliers as high as 64x, giving the game a much more aggressive win-boosting structure than a standard mystery slot.
Another key mechanic is the hook symbol, which can land on the first and sixth reels. When it does, it transforms all high-paying symbols on the same row into 1x1 wild symbols, then changes into that same symbol itself. That can create sudden row-based upgrades and gives the game an extra layer of unpredictability beyond the expanding wilds.
The main bonus is triggered by landing 3 or more scatters on reels 2-5. This awards 6 free spins, plus 2 additional free spins for every extra scatter. If a super scatter lands alongside the triggering scatters, the game instead activates Super Free Spins.
Before the free spins round begins, the game first plays out a puzzle respin bonus feature. This feature determines the minimum wild multiplier value that can appear during the upcoming bonus and can also activate hook symbols and 1x1 wilds. Puzzle pieces landing on the board can award extra respins and even additional free spins, while completing the full puzzle instantly awards the maximum win.
If Super Free Spins are triggered, two hooks are guaranteed to land during both the puzzle feature and the subsequent free spins round. For players in jurisdictions where the option is enabled, there are also two Bonus Buy choices: Free Spins for 75x stake and Super Free Spins for 150x stake.
Key Features
- RTP: 96.47%
- Release Date: 01 June 2026
- Layout: 6x4
- Theme: horror-themed mystery slot set around a sinister sanatorium atmosphere
- 1x4 wilds: expanding wilds on reels 2-5 with multipliers up to 8x
- 2x4 fiery wilds: appear on reels 3 and 4 with multipliers up to 64x
- Hook symbols: land on reels 1 and 6 and turn high-paying symbols on the same row into 1x1 wilds
- Bonus trigger: landing 3+ scatters on reels 2-5
- Free spins: 6 free spins, plus 2 extra for each additional scatter
- Super Free Spins: triggered by landing 3 scatters plus a super scatter
- Pre-bonus feature: puzzle respin bonus game
- Puzzle feature effects: can raise the minimum wild multiplier, activate hooks and 1x1 wilds, and award extra respins/free spins
- Instant max win trigger: completing the entire puzzle awards the maximum win
- Super feature boost: 2 hooks guaranteed in the puzzle feature and free spins
- Bonus Buy: Free Spins 75x, Super Free Spins 150x
Bonus & Special Features
- Expanding wild multipliers: 1x4 wilds can land on reels 2-5 with multipliers of up to 8x in both base game and bonus play.
- Fiery 2x4 wilds: larger 2x4 wilds can cover reels 3 and 4 and carry multipliers as high as 64x.
- Hook symbol mechanic: hooks on reels 1 and 6 transform all high-paying symbols on the same row into 1x1 wilds, then become that same symbol themselves.
- Scatter-triggered feature: landing 3 or more scatters on reels 2-5 awards 6 free spins plus 2 extra spins for each additional scatter.
- Super Free Spins trigger: landing a super scatter together with 3 scatters activates the upgraded bonus version.
- Puzzle respin feature: before free spins start, a respin-based puzzle feature plays out and sets the stage for the bonus round.
- Minimum multiplier upgrade: the puzzle bonus determines the minimum wild multiplier value that can land during the following free spins.
- Extra rewards in the puzzle: puzzle pieces can award extra respins, additional free spins, and can also activate hook symbols and 1x1 wilds.
- Maximum win shortcut: completing the full puzzle instantly awards the maximum win.
- Super Free Spins enhancement: if the super version is triggered, two hooks are guaranteed in both the puzzle feature and the subsequent free spins.
- Bonus Buy menu: where available, players can buy Free Spins or Super Free Spins directly.
*Feature triggers, Bonus Buy availability, and exact game configuration can vary by jurisdiction or casino setup - always check the in-game paytable and info panel before playing.
Game Stats & Betting
- RTP: 96.47%
- Release Date: 01 June 2026
- Layout: 6x4
- Bonus trigger: 3+ scatters on reels 2-5
- Free spins start: 6 free spins
- Additional spins: +2 per extra scatter
- Super trigger: 3 scatters plus a super scatter
- 1x4 wild multiplier: up to 8x
- 2x4 fiery wild multiplier: up to 64x
- Hook reels: 1 and 6
- Bonus Buy: Free Spins 75x, Super Free Spins 150x
- Key Features: expanding multiplier wilds, fiery wilds, hook symbols, puzzle respins, free spins, Super Free Spins
*RTP and feature behaviour may vary by jurisdiction or casino configuration - always check the in-game paytable and info before playing.
Where to Play Sanatorium Secrets
Sanatorium Secrets Slot FAQ
- When was Sanatorium Secrets released?
- Sanatorium Secrets was released on 01 June 2026.
- What is the RTP?
- The RTP of Sanatorium Secrets is 96.47%.
- How do you trigger the bonus game?
- Landing 3 or more scatters on reels 2-5 triggers the bonus game with 6 free spins, plus 2 extra free spins for every additional scatter.
- What triggers Super Free Spins?
- Landing a super scatter together with 3 scatters triggers Super Free Spins.
- What do the hook symbols do?
- Hook symbols on reels 1 and 6 transform all high-paying symbols on the same row into 1x1 wilds, then turn into that same symbol.
- How high can the wild multipliers go?
- The 1x4 expanding wilds can carry multipliers of up to 8x, while the 2x4 fiery wilds can go as high as 64x.
- What happens in the puzzle respin feature?
- The puzzle respin feature takes place before free spins and sets the minimum wild multiplier value for the bonus. It can also activate hook symbols, 1x1 wilds, extra respins, and additional free spins. Completing the full puzzle awards the maximum win.
- Is there a Bonus Buy feature?
- Yes. There are two Bonus Buy options: Free Spins for 75x stake and Super Free Spins for 150x stake.
- Where's the official game page?
- https://www.pragmaticplay.com/en/games/sanatorium-secrets/
Casino Beacon Verdict
Sanatorium Secrets looks like one of Pragmatic Play's more feature-stacked horror releases, combining a creepy sanatorium setting with several mechanics that can meaningfully reshape the reels. The combination of 1x4 expanding wilds, larger 2x4 fiery wilds, and the row-changing hook symbol gives it more happening in the base game than many slots that save almost everything for the bonus.
The most interesting part, though, is the two-stage feature structure. Instead of going straight into free spins, the game first uses a puzzle respin feature to influence how strong the bonus can become, with the possibility of improving the minimum multiplier floor, adding spins, and even awarding the maximum win outright. If you enjoy darker themes and bonus rounds with a little more setup and progression, this looks like a slot worth checking out.
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