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Castle of Terror Slot - Review, Free & Demo Play

Castle of Terror
Castle of Terror
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Updated: 22.07.2025
Reviewed by: Joe Booth
The mystical slot machine Castle of Terror by Big Time Gaming, which was released on 20/09/2022, will take you to a mysterious castle where everything is not so simple. The inhabitants of this location look like ordinary people, but at the sight of Wild Holy Water, they turn into evil vampires. In the fight against vampires, progressive multipliers, several types of free spins, and holy water will help you. In this review from Slotsjudge, you will learn all the ins and outs of the machine to be ready to play for real money!

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In this review
  1. Slot details
  2. Theme
  3. Bonus Rounds & Free Sipns
  4. Summary
  5. Where to play
General information about Castle of Terror slot

General information about Castle of Terror slot

Rating by Joe Booth:
9.5
User’s Rating: (based on  reviews):
8.5
Big Time Gaming
Write a review +25 SJ points
  • Release Date:
    20.09.2022
  • Volatility:
    High
  • RTP:
    96.7%
  • Multiplier:
    Yes
  • Max. win:
    61,720x
  • Bonus game:
    No
  • Free spins:
    Yes
  • Scatter Symbol:
    Yes
  • Wild symbol:
    Yes
  • Symbol Stacked:
    No
  • Jackpot Game:
    No
  • Slot lines:
    4,096
  • Slot reels:
    6
  • Layout:
    6-4
  • Stakes range (€/£/$):
    0.20 to 15
  • Slot Theme:
    Vampires
  • Technology:
    HTML5
More infoLess info

Licensed and tested by

  • Gambling Comission
  • MGA

How to Play

Castle of Terror is filled with horror and a 6x4 layout with 4,096 ways to win. But keep in mind that all ways lead to the mystical castle where you can get Enhanced Free Spins or classic free spins. You will also get unlimited progressive multipliers in the bonus game. Below, you will find instructions that can help you launch the slot for real money:

  1. Register at the online casino and make a deposit
  2. Find a game and activate it for real money
  3. Place a bet from €0.20 up to €15
  4. You can also buy bonus spins with your credits

Castle of Terror RTP and Volatility

9.1 
The fight against vampires in the Castle of Terror game will take place with an RTP of 96.72% and high volatility.
Yes, high volatility always adds pepper to the gameplay, but keep in mind that all risks will be justified since the slot has a very generous max win. And also keep in mind that during Bonus Buy will be slightly higher 96.73%.

Theme

8.9 

Walking on a sunny morning, you will find a beautiful old castle that stands alone on a hill. When you want to get closer to it and get acquainted with the local inhabitants, you will meet ordinary peaceful people, but when the full moon comes, they will turn into evil vampires. As an experienced gambler, you know that Wild Holy Water will help you in this matter. If you defeat these vampires, you will receive a very high reward.

In the ancient Castle of Terror, you will come across mystical symbols that can be exchanged for credits. For example, for card symbols are the lowest-paying ones, for a gardener, a maid, and a gentleman are the medium symbols, and an evil lady pays the highest wins. The wild symbol in the form of holy water can replace symbols and increase the multiplier for the winning spin by +1. Scatter symbols start the game with free spins, and Mega Scatter will be able to open the round with Enhanced Free Spins.

Theme
Castle of Terror Slot - Paytable

Mobile Compatibility

Castle of Terror Slot Mobile

If you prefer mobile gaming, Castle of Terror by Big Time Gaming is fully optimized for mobile gadgets. Also, using your smartphone, you can play both in demo mode and for real money.

About Big Time Gaming

The Big Time Gaming provider was launched in 2011 and it offers all gamblers and online casinos unique slots, table games, blackjack, and roulette. It is worth noting that Big Time Gaming has received many awards. At the moment, the author's portfolio includes more than 60 slots with unique plots. For example, Bonanza Megapays, The Final Countdown, and Cyberslot Megaclusters.

Bonus Rounds & Free Spins

10 

The scary Castle of Terror slot by Big Time Gaming has a lot of bonus features that are available both in the main game and during additional rounds.

Holy Water

In random order, in any game mode, holy water can spill onto the 4 middle reels. If water hits 2 or more medium-value symbols, they will turn Wild and receive a +1 multiplier. This feature will allow you to catch wins in a row and bring you good payouts.

Free Spins and Enhanced Free Spins

There are 2 Scatter symbols on the reels of Castle of Terror – the classic one and the Gold Castle. Collecting 3 or more of these symbols is worth 12 free spins and for each additional 3 spins. In each round, you can get a progressive multiplier and the Holy Water feature on every spin. Let's look at the difference between rounds:

  1. Silver Castle Scatter A regular round where the multiplier starts at 1x and increases by 1+ when medium symbols become Wild.
  2. Enhanced Free Spins The multiplier starts at 2x and increases by +2 when the medium and high symbols become Wild

All these rounds will combine that if you win 20x, you will receive 6 free spins.Castle of Terror Slot - Enhanced Free Spins

Win Exchange

If you get a 100x win, you can exchange this reward for 12 free spins. Also, if you have an opportunity to exchange winnings from 25x to 100x for a wheel of fortune, in which you can get 12 free spins or lose.

Buy Bonus

It is worth noting that free spins are available for a streaming balance. The classic 12 free spins are worth 70x, while the Enhanced Free Spins round is worth 200x.

Castle of Terror Demo Play

Castle of Terror is available not only for real money but also in demo mode, which will allow you to play without a deposit. Many gamblers take advantage of this opportunity to test the game.

Max Win

10 
If you can neutralize the vampires, then you can take possession of the treasures of the castle in the form of 61,720x max win.
Yes, such a win is really cool and it is definitely worth fighting for. But be careful since not only vampires but also high risks while gambling can be dangerous.

Overall Rating

9.5
The mystical Castle of Terror slot machine can offer not only a cool plot but also nice bonus rounds that will help you get up to 61,720x max win. We really liked the progressive multipliers in the bonus game, which have no limits and when you get 20x, you will be given 6 more spins. The only thing that causes mixed emotions is the implementation of Win Exchange. But in general, the game is very interesting!
Hits
Several rounds with free spins
Unlimited progressive multipliers
Holy Water feature
The 61,720x max win
Misses
Win Exchange Implementation

Castle of Terror Slot - FAQ

What is the difference between bonus rounds with free spins?

The most important differences are that in the regular round, you start with a 1x multiplier and add +1 for each successful transformation of medium symbols, while in Enhanced Free Spins, you get 2x and add 2x each for the transformation of medium and high symbols.

What is the maximum win in the slot?

If you can neutralize the vampires, then you can take possession of the treasures of the castle in the form of 61,720x max win.

What is the RTP in Castle of Terror by Big Time Gaming?

The fight against vampires will take place with an RTP of 96.72% and high volatility.

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Joe Booth
Joe Booth
Expert in: News, Blog, Slot reviews, Payments
Joe is an expert online casino player, who knows all the tricks and tips on how to get to the most massive wins. He is also an experienced online casino games reviewer, with hundreds of written articles behind him, on all kinds of online casino games. He makes sure to play them, see how they work, and then gives his honest expert opinion about them to other players, our readers. 

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Reviewed by Editor-in-Chief
Nikita Lukanenoks
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Overall rating

Based on 2 reviews

8.5/10
Sloto Toto own avatar
Sloto Toto
6 lvl Superstar
9
Winning: €7
Multiplier: x18
A super volatile and very mysterious slot. The definition of an unpredictable game.
The main story of the game is a random bottle that throws wilds and multipliers into the board. U never what to expect from it. But it’s nice to have an enhancer that can possibly lead to you to something huge. U can play and win BIG even w/o free spins. Freebies, well, there 2 different modes that can be triggered by different scatters. They are just huge due to progressive multiplier...
Review image 2118-0
10.12.2022
Primstan own avatar
Primstan
6 lvl Superstar
8
Winning: €46
Multiplier: x233
Castle of Terror has that vampire themed vibe and these BTG's old school graphics fit in perfectly. The potential that exceeds 90000x is incredible and the slot has a decent feature, that activates the grid and turns premium symbols into wilds, while increasing the overall multiplier. The feature is not always active when it comes to the base game, making a base game a little bit tough, however, in FS it's always active. FS re-trigger once you collect all the drops of blood. Multipliers remain
Review image 2042-0
27.11.2022
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