Are you brave enough to embark on a horror adventure where you’ll encounter vampires eager to suck out the last drop of your blood? If the answer is yes, then join Big Time Gaming and take a spin on the new Castle of Terror slot.
What you get is a classy package that takes slot enthusiasts to a beautifully-designed scenery, which turns into a gore setting of a horror movie once the sun goes down. The best part of the game is that it delivers a distinctive playing experience, immersing players right from the start. Let’s take some time to explore the creepy world painted by the renowned developer’s development team.
Welcome to the World of Horror
Castle of Terror is playable on any device, allowing players to place any bet ranging from $0.20 to $15 per spin. Big Time Gaming describes the game’s maths model as “very high”, while the return to player varies between 96.72% and 96.73%, depending on whether the bonus buy option is used.
The action takes place on a six-reel, four-row grid, using 4,096 different ways to win instead of traditional paylines. Players must land symbols of the same kind to create a winning combination on adjacent reels, starting from the one on the far left.
Playing card symbols are at the bottom of the paytable, awarding cash prizes reaching 0.5x the bet for six-of-a-kind. The four main characters deliver more prominent awards. The slot’s four main characters appear in two forms, one for the day and one when the sun goes down, paying up to 50x the triggering stake! Wilds are also there, replacing other regular symbols to complete additional winning ways.
Castle of Terror: Features
Castle of Terror is packed with thrilling and potentially very lucrative features. Some of them are available in both the Main Game and Free Spins, while the bonus round has two equally exciting variants.

But that’s not all, as two additional options provide plenty of opportunities.
Holy Water
Players can randomly trigger the Holy Water feature on any spin. The liquid will be splashed on the four middle reels when this occurs. Two or more positions containing the four main characters will turn into Wilds, increasing the multiplier by one. The multiplier resets for the next spin.
Free Spins
Castle of Terror features two Scatter symbols: a regular silver castle Scatter, and the gold castle Scatter. Landing three regular Scatters anywhere in view awards twelve spins, with each additional one awarding three more. If the gold castle Scatter is among the triggering symbols, you’ll gain access to Enhanced Free Spins.
Both bonus rounds include a progressive win multiplier. The best part about it is that it doesn’t reset between spins. The Holy Water feature is activated on every spin.
The win multiplier starts at 1x in regular free spins, going up by one whenever one of the four characters turns wild. In Enhanced Free Spins, the win multiplier begins at 2x and increases by two when one of the four high-paying icons turns wild.
Increasing the win multiplier to 20x adds six more spins to the tally in both bonus rounds.
Players can buy regular or Enhanced Free Spins by paying 70x or 200x their bet, respectively.
Win Exchange
Players can enter the bonus round through the Win Exchange. Whenever they win a prize of at least 100x their bet, they can pay another 100x the stake to unlock the bonus and receive twelve spins. If their win is between 25x and 100x the bet, they can gamble their winning for the chance to start Free Spins. The wheel spins, and if it stops on a green segment, the round is triggered. However, landing on a red segment will forfeit the initial win.
