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Castle of Terror [BIG TIME GAMING]


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Title: Castle of Terror
Developer: Big Time Gaming
Reels: 6
Rows: 4
Paylines: 4,096
RTP: 96.72% | 91.0% (DE)
Hit Freq: 31.7%
Max Win: 61,720x
Volatility: High
Min/Max Bet: 0.20/15
Release Date: October 19, 2022

Play Now: https://k8.io/games/slots/big_castleofterror

Castle of Terror: Slot Overview

Grab a clove or two of garlic and come join software provider Big Time Gaming as it explores the nosferatu side of life in an online slot titled Castle of Terror. Frightening name, but if you look at the title font, it kind of suggests a B movie level of horror rather than something actually gory or scary. Castle of Terror is actually quite classy and whips players off to an exotic destination to enjoy the charming scenery by day, then avoiding getting nipped in the neck when the sun goes down.

Till then, let's take in the sights which are extraordinarily detailed like a Thomas Kinkade painting. It depicts an autumnal scene of a quaint community overlooked by the Castle of Terror set high up on a hill. Sunlight beams through the clouds on imagery you don't see every day in an online slot. It's like one of those video games where you guide a character along paths, into buildings, finding clues and uncovering objects you'll need to defeat the baddies. Castle of Terror is obviously a different sort of game; one in which BTG has painted a pretty and very detailed picture for the creepiness to take place.


Any device is suitable for tackling the Terror on, where players can select a bet of 20 p/c to £/€15 per spin. As we've come to expect from BTG, the math model is a highly volatile one, whilst the return to player varies ever so slightly between 96.72% overall to 96.73% when buying a bonus. Slightly surprising, perhaps, due to the shape of the grid, but Castle of Terror is not a Megaways game. Instead, it is played on a 6-reel, 4-row panel with 4,096 ways to win. Wins occur when matching symbols fall on adjacent reels starting from the leftmost side.

9 to Ace cards start the paytable off, paying 0.3-0.5x the bet for a six-of-a-kind win, then four characters are used as the high pays – the Gardener, Maid, Gentleman, and Lady. Whether they are in their friendly daytime form, or their less friendly, bitey free spins form, landing six of a kind is worth 0.6-50 times the stake. The wilds, when they appear, are able to substitute for any normal pay symbols to help complete ways.

Castle of Terror: Slot Features


Castle of Terror makes use of a Holy Water feature in both the base and bonus game, handy to keep the vamps at bay, while free spins come in two forms – regular free spins or Enhanced Free Spins. As well as these, players may have access to the Win Exchange or the Bonus Buy.

Holy Water

On any base game spin, Holy Water may randomly trigger, and liquid is splashed on the middle four reels. When activated, 2 or more positions containing the Gardener, Maid, Gentleman, or Lady are converted into wild symbols. Each symbol converted into a wild symbol increases the win multiplier for that spin by +1. Wins are evaluated after the wild transformation has occurred, and the multiplier resets for the next base game spin.

Free Spins and Enhanced Free Spins


Castle of Terror has two scatters – a regular Silver Castle Scatter and the Gold Castle Scatter. Landing 3 scatters in any position awards 12 free spins, plus 3 free spins for any additional scatters in view. If one of the triggering scatters was the Gold Castle Scatter, Enhanced Free Spins are awarded instead.

Both free spins bonus rounds have a progressive win multiplier that does not reset between spins – and Holy Water is triggered on every single spin.

In the regular free spins round, the win multiplier starts at x1 and increases by +1 every time a Gardener, Maid, Gentleman, or Lady turns wild.
In Enhanced Free Spins, the multiplier starts at x2 and increases by +2 whenever a high pay symbol is converted into a wild.
In both games, if the win multiplier reaches x20, then +6 additional free spins are awarded. On a last note, if the opportunity to buy free spins is there, players can buy the regular free spins for 70x the bet or Enhanced Free Spins for 200x the bet.

Win Exchange

Another way of possibly entering free spins is with the Win Exchange. Firstly, whenever players win 100x their stake or more, they can pay a value worth 100x the stake in exchange for 12 free spins. Or, when winning between 25-100x the bet, players can gamble their winnings for the chance to win 12 free spins. A wheel spins, and if it lands on a green segment, free spins are won. If it lands on a red segment, no free spins are won, and the original win is forfeit.


Castle of Terror: Slot Verdict

Castle of Terror was an unusual slot that kind of caught us off guard at first. It came across as a mix of art and literature, similar to Apollo Pays Megaways, but arguably even more severe in tone. The dour quality isn't off-putting; if anything, it made Castle of Terror even more intriguing. Castle of Terror presents a more serious-minded approach to vampirism, leaning closer to something like Immortal Romance than, say, Baron Bloodmore in terms of atmosphere.

Or, perhaps we're just overanalysing after being thrown a curveball in the form of the game's representation. If so, let's let the audio-visuals rest and proceed to the gaming side of things. First, the lack of Megaways or cascades played into the initial uncertainty yet didn't detract from the game's overall enjoyment. In their place is a wild transformation/increasing multiplier feature, aka Holy Water which pops up at random in the base game or on every single free spin. It didn't always blow up, but when factoring in thousands of ways, with potentially several wilds and a multiplier on top means there are chances for solid results in the base game. Free spins, too, since there the multiplier doesn't reset between spins; it only goes up or stays level. Knowing BTG, Castle of Terror's potential is no doubt impressive, maxing out at 61,720 times the stake.

So, for a slot with a creepy edge (the vampire Gentleman and Lady are a tad unsettling) or a glimpse at another side of BTG's personality, Castle of Terror warrants a look. It's not one of the studio's top-tier, triple-A, gold star releases, and Holy Water can drag when you know the wild conversions aren't going to link with anything, but Castle of Terror has the right components to provide a dab of horror or be a highbrow Halloween alternative to the usual run of pumpkins, cobwebs, and candy.

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