Evoplay launches Halloween slot The Castle of Slotenstein

Evoplay has released The Castle of Slotenstein, a Halloween-themed slot inspired by Frankenstein, the company said on 15th October 2026. The title centres on a Hold & Win-style Bonus Game supported by three “booster” mechanics tied to coloured pumpkin Bonus symbols.

According to Evoplay, Green Shock symbols increase the opening number of Bonus Game spins from three to four. Purple Trick symbols can generate additional Bonus symbols on their reel or increase the values of existing ones up to 5x. Blue Treat symbols add their values to every Orange Bonus symbol already on the grid.

The Bonus Game starts with three or four spins depending on active boosters, and only Bonus symbols appear. Evoplay said each new Bonus symbol resets the spin counter. When three Bonus symbols fill a reel, a collect is triggered: their values are added to the win meter before the reel is cleared.

Progression is tied to a “Grand Reel of Fortune”. Evoplay said the first time a reel is completed, one of five sections of the Grand Reel of Fortune is unlocked. Unlocking all five sections results in one final spin with one of eight possible prizes, including 2x, 3x, 5x and 8x multipliers, plus Mini, Mega, Super and Grand prizes.

Players can also buy direct entry to the feature via a Bonus Buy, with the option to start with one, two or all three boosters active. Ivan Kravchuk, CEO at Evoplay, said: “The Castle of Slotenstein, gives the classic Frankenstein story an Evoplay twist, combining a spooky Halloween setting with a feature set designed to keep the action building.

“The three boosters each change the way the Bonus Game develops, while the Grand Reel of Fortune gives players a target to chase as they work through the feature. It makes for a suitably unpredictable addition to our portfolio just in time for scary season.”