Sanatorium Secrets: Wilds Behind Locked Doors

Sanatorium Secrets is a Pragmatic Play horror slot built around wild multipliers and a two-part bonus. The reels run from 1 to 6, with expanding wilds working on reels 2 to 5 and special hook symbols on the outer reels 1 and 6.

The structure is easy to summarise. In the base game, wilds and hooks do the work. Land enough scatters and a puzzle respin round plays out first, setting up the free spins that follow, including the minimum wild multiplier that can appear in them.

That puzzle round is also where the top prize sits: Pragmatic Play states that completing the entire puzzle instantly awards the maximum win.

Pragmatic Play lists the RTP of Sanatorium Secrets at 96.47% on its game page, and that is the only RTP figure it publishes there. Check the RTP stated in the game's own information screen when you play, because that is the figure for the version in front of you.

The game page does not publish volatility, a max win multiplier, a bet range or a release date, so none are given here. The figures Pragmatic Play does publish are the multiplier caps on the wilds: up to 8x on the 1x4 expanding wilds and up to 64x on the 2x4 wilds.

The free spins counts are also fixed by the rules: 6 free spins for three scatters, plus 2 more for each additional scatter.

Two types of multiplier wild appear in both the base game and the bonus. The first is a 1x4 expanding wild that can fill any of reels 2 to 5 and can carry a multiplier of up to 8x.

The second is the fiery 2x4 wild, which can engulf reels 3 and 4 together and carries a multiplier as high as 64x. It is the only wild described as covering two reels at once.

Those caps are the biggest multipliers Pragmatic Play publishes for the game. A standard expanding wild tops out at 8x, while the fiery wild can reach eight times that, so watch which of the two types lands when a wild appears on reel 3 or 4.

Hook symbols land only on the first and sixth reels. When one lands, it transforms all high-paying symbols on the same row into 1x1 wild symbols, then turns itself into that same symbol.

This makes the hook a row tool rather than a reel tool. It works across the grid horizontally while the expanding wilds work vertically, so a row hook and an expanding wild on the same spin cover the board from two directions.

The effect depends on what is already on the row. A row full of high-paying symbols gains several wilds; a row of low-paying symbols gains none, because only high-paying symbols are converted.

Landing three scatters on reels 2 to 5 triggers the bonus game with 6 free spins, plus 2 for every additional scatter. As an illustration of that rule, four scatters would start the feature with 8 free spins.

A super scatter landing alongside three scatters activates Super Free Spins instead. The difference is the hooks: in Super Free Spins, two hooks are guaranteed to hit in the puzzle feature and during the free spins that follow.

Since hooks are what turn high-paying symbols into 1x1 wilds, the two guaranteed hooks are the clear difference between the super version and the standard one, adding 1x1 wilds on top of the multiplier wilds already in play.

Before the free spins begin, a puzzle respin bonus game plays out. It determines the minimum wild multiplier value that can land during the free spins that follow, and it can activate hook symbols and 1x1 wilds for that round.

Each puzzle piece that lands on the grid can unlock additional respins and additional free spins, so the respin round can extend both itself and the bonus that comes after it.

Completing the entire puzzle instantly awards the maximum win. Pragmatic Play does not publish the max win figure on its game page, so check the game's own information screen for the exact amount.

The free Sanatorium Secrets demo on this page is the best way to see how the two parts of the bonus connect. In the puzzle round, note the minimum wild multiplier it sets, because that floor applies to every free spin after it.

In the base game, watch which wild type lands. The 1x4 expanding wild caps at 8x and can appear on any of reels 2 to 5; the fiery 2x4 wild only covers reels 3 and 4 but goes up to 64x.

Check the hooks on reels 1 and 6 as well, and count how many high-paying symbols sit on their rows. A demo session shows how the features behave, not what any future spin will pay. Play is for adults aged 18 and over only.

Other Pragmatic Play titles covered on Slotscritic: Sweet Bonanza POP, Big Bass Halloween Splash 1000, Wonders of Aztec, Odds On Winner, Deep Sea Frenzy and Pelican Payday.

What is the RTP of Sanatorium Secrets?

Pragmatic Play lists the RTP of Sanatorium Secrets at 96.47% on its official game page, the only RTP figure it publishes there. Check the game's own information screen when you play, since the RTP shown there is the one that applies to the version you have loaded.

What is the max win on Sanatorium Secrets?

Pragmatic Play does not publish a max win multiplier on its game page. It does state that completing the entire puzzle in the respin round instantly awards the maximum win, and the game's information screen shows the exact figure. The biggest published multipliers are the 2x4 fiery wilds, at up to 64x.

How do you trigger free spins in Sanatorium Secrets?

Land three scatters on reels 2 to 5 to trigger 6 free spins, plus 2 more for every additional scatter. Three scatters with a super scatter activate Super Free Spins, where two hooks are guaranteed in the puzzle feature and the free spins. A puzzle respin round always plays before the free spins begin.

How do the wild multipliers work in Sanatorium Secrets?

There are two multiplier wilds, active in both the base game and the bonus. The 1x4 expanding wild can fill any of reels 2 to 5 with a multiplier of up to 8x, and the fiery 2x4 wild covers reels 3 and 4 with a multiplier of up to 64x. The puzzle round sets a minimum wild multiplier for the free spins.

What do the hook symbols do in Sanatorium Secrets?

Hook symbols land on reels 1 and 6. When one lands, it turns every high-paying symbol on the same row into a 1x1 wild, then becomes that same symbol itself. The puzzle respin round can activate hooks for the free spins, and Super Free Spins guarantee two hooks.

Can you play the Sanatorium Secrets demo for free?

Yes. The Sanatorium Secrets demo on this page runs Pragmatic Play's game with play credits, so you can watch the expanding and fiery wilds, the hooks and the puzzle respin round without staking money. It uses the same rules as the full game.