Sanatorium Secrets

Quick facts: RTP, volatility, max win

Sanatorium Secrets, released by Pragmatic Play in June 2026, is a 6×4 grid with 4,096 ways to win, a 96.47% RTP on its top configuration (it also ships in lower configs, and the operator picks which one runs), classified as medium volatility, with a maximum win of 10,000x the bet, set in an asylum horror mystery theme.

Cross-link: provider profile Pragmatic Play.

How Sanatorium Secrets plays: the expanding wilds

Sanatorium Secrets pays across a 6×4 grid with 4,096 ways to win, so matching symbols count from the leftmost reel regardless of their row. The core mechanic is its wilds, and they behave the same way in the base game and the bonus.

The everyday wild is a 1×4 expanding wild that can fill reels 2 to 5, and it lands with a multiplier of up to 8x attached. Above that sits a fiery 2×4 wild that can engulf reels 3 and 4, carrying a multiplier as high as 64x. The two wild types stack their multipliers when they land in the same spin, which is where the larger wins come from.

There is also a hook symbol that appears only on reels 1 and 6. When a hook lands, it transforms all of the high-pay symbols on the same row into 1×1 wilds, then turns into that same symbol itself. It is a tidy way to seed extra wilds into a paying spin without expanding a full reel.

Bonus features and free spins

The feature is triggered by three scatters on reels 2 to 5, which award six free spins. Each extra scatter on top of the three adds two more spins, so a four-scatter trigger gives eight and so on. If a super scatter lands alongside the three scatters, it activates Super Free Spins instead of the standard round.

Before the free spins begin there is a puzzle respin bonus. This step sets the minimum wild multiplier that will apply during the free spins, and it can also activate the hook symbols for the round. In practice it is the puzzle respin that decides how generous the feature will be before you have spun once, since a higher minimum multiplier floor raises every wild win that follows. The same expanding and fiery wilds carry through the round, so the 8x and 64x ceilings still apply once the spins are running.

BonusOracle’s verdict

Sanatorium Secrets is a polished, slightly above-average Pragmatic slot rather than a breakout. The asylum mystery theme is atmospheric and the wild system is the genuine draw, with the 64x fiery wild and the puzzle respin floor giving the feature more shape than a plain free-spins round. The puzzle step in particular adds a sense of anticipation that the engine itself does not always deliver, and the 4,096-ways base keeps the spins ticking. Against that sit a few honest watch-outs. The RTP ships in multiple configurations, so 96.47% is the best case and an operator can quietly run a lower one. The 10,000x ceiling is modest for a feature this layered, the medium volatility means the big multiplier wilds rarely line up, and the underlying ways-pay-plus-expanding-wild engine is familiar territory that Pragmatic has visited before. We ran the ClientHub demo build, cross-checked the RTP, the max win and the feature maths against the game-info panel, and scored it 7.4/10: a well-built slot worth a look for the wilds, short of essential because of the multi-config RTP and the modest top end.

FAQ

What is the RTP of Sanatorium Secrets? The top configuration is 96.47%. Pragmatic also ships lower-RTP versions, and the operator decides which one runs, so confirm the figure in the game-info panel before you play.

What is the maximum win on Sanatorium Secrets? 10,000x the bet. The fiery 2×4 wild can carry a multiplier as high as 64x and the expanding wild up to 8x, but the game’s overall win is capped at 10,000x.

Is Sanatorium Secrets high volatility? Pragmatic classifies it as medium volatility. Expect a fairly steady base game, with the bigger wins resting on the wild multipliers and the free-spins feature lining up.

Can I play Sanatorium Secrets for free? Yes. The free demo runs on this page using the Pragmatic Play demo build, with no deposit or sign-up.

Does Sanatorium Secrets have a bonus buy? Yes, where the regulator allows it. The feature buy costs roughly 75x the stake and takes you straight into the free-spins round. It is switched off in markets that ban bonus purchases.

Responsible gambling

Slots are designed to entertain, not to earn. Set a budget before you spin, treat any win as luck rather than skill, and never chase losses. If gambling stops being fun, take a break or use the deposit limits, time-outs and self-exclusion tools your casino is required to offer. Support is free and confidential through your national helpline.