Castle of Terror Slot: Features, RTP, Winnings, and More

November 10, 2022

Castle of Terror is a vampire/horror-themed slot machine that was released by Big Time Gaming just recently. It has become one of the most popular titles filling the rows of Halloween-featuring slot games. Set in a mysterious location resembling Transylvania, the slot takes you into a creepy castle full of scary and thrilling adventures. What makes this game so popular is the special pack of features and benefits you can access after loading the slot. The core advantages include the following:

  • The maximum winning of 61,720x your bet;
  • The feature of a wild transformation multiplier;
  • Bonus Buy & Win Exchange;
  • Fixed RTP rate of 96.72 %;
  • Licensed software

These features alone are enough to attract any slot lover’s attention and make them play online Castle of Terror without much thinking. If it’s the case for you, too, then feel free to check out our top online casinos and try out the game with the best offers possible.

Castle of Terror Slot

Play Castle of Terror Online For Real Money

Do you want to get started with Castle of Terror for real money? Or do you prefer demo versions more? No matter what your final answer is, the game provider has all options ready for you. If you don’t want to take risks, register an account, or are simply new to the gambling industry, you can first try playing the demo Castle of Terror slot. This is the perfect way to gain gaming experience and learn all THE strategies and tips necessary to succeed in the game. 

After getting acquainted with the basics of the game, you can already switch to playing for real cash. In order to get started, you just need to choose an online casino site from the recommended list, go through a registration process or log in to your existing gaming account, make a qualifying deposit and begin spinning. 

Game Mechanics 

Castle of Terror Gameplay

The actions of the game take place in a grid consisting of 4 rows, 6 reels, and 4,096 fixed ways to win.

Castle of Terror (Big Time Gaming) is a provably fair game you can play without encountering any scamming or illegal mechanisms. It is driven by a blockchain-based algorithm that enables you to verify the random nature of spins and rounds.

Simply put, this mechanism generates a hash whenever you push the spin button, and you can access it to check the final result.

Random Number Generator 

The slot game works on the random number generator integrated into its system. It adds an extra layer of security due to its random nature and makes it quite tough for third-party apps to interfere with the game mechanism.

RTP (Return to Player)

The theoretical RTP rate of this game is 96.72%, which is slightly higher than the average level common to most slot machines.


The slot’s volatility is very high, and the hit frequency rate is 31.7%. It means you can hit a win almost every 3.15 spins.

Maximum Winning

The most you can win during the base game is 29,690x the total bet. However, in the free spins, you can get your hands on the Castle of Terror big win of 61,720x the bet. 

Betting and Prizes

When playing, you can choose between a minimum bet of $0.20 and a maximum bet of $15.

Features and How They Work

Castle of Terror Payout

The main features you can find in the game are Holy Water, Win Exchange, and Free Spins. Here let’s look through them one by one.

Holy Water

This feature can randomly appear on any spin during the base game. When triggered, you will see liquid splashed on the four central reels and positions covering Maid, Gardener, Lady, and Gentleman converted into wilds. Each symbol transformed into a wild symbol can increase the win multiplier by +1. Wins will be calculated after the wild transformation has taken place, and the multiplier will reset for the next spin.

Free Spins/Enhanced Free Spins

You will run into two scatter symbols in the game – the Gold Castle Scatter and a standard Silver Castle Scatter. If you land three scatters anywhere on the reels, you will get 12 free spins and three free spins for any extra scatter symbols in view. If one of the activated scatters the Gold Castle Scatter, then Enhanced Free Spins will be awarded. 

Both bonus rounds come with a progressive win multiplier, not resetting between spins.

During the regular spins, the win multiplier will start at x1 and increase by +1 whenever a Gardener, Gentleman, Maid, or Lady transforms wild.

During the Enhanced Free Spins, the multiplier will start at x2 and increase by +2 every time a high-paying symbol is turned into a wild.

Win Exchange

A different way of activating free spins is using the Win Exchange feature. Firstly, every time you win 100x the bet or more, you can pay 100x the stake and exchange it for 12 spins. 

The next option is winning from 25x to 100x. In this case, you can gamble your earnings to get 12 additional spins. A wheel will spin, and if it stops on a green segment, then you will win the free spins. However, if it stops on a red segment, the original win will be forfeited, and no free spins will be won.

Castle of Terror Mobile Slot

Produced with HTML5 technology, the game is available for all users to access and play the slot on any possible device, including mobile, laptop, and tablet. The 6×4 grid especially works well on smartphones, including Android, iOS, and Windows devices.

The game provider offers you two options when playing from a mobile phone: downloading and installing the app or playing straight on the browser’s mobile version. 

The application, normally, is the best choice for regular players who want to access the game anytime and anywhere. And the browser option, on the other hand, is perfect if you don’t want to download any files but access the game directly on your browser.

Playing and Winning With Castle of Terror

Castle of Terror Rules

Now let’s get to the most exciting part and see how you can start playing the Castle of terror game. First and foremost, you need to create an account at one of the suggested online casino platforms. The procedure is mostly the same for all casinos and takes just several minutes. All players over the legitimate age can easily log in, create an account, and play the game at top sites. Just go to the official website of your preferred online casino and follow the steps below:

  1. Go to the main page of the gambling site and click on the “Register” button.
  2. Select from the available registration options ( email address or mobile phone) and enter a complex password.
  3. Confirm the accuracy of the information by entering the verification code or clicking on the confirmation link sent to your provided contact address.
  4. Load the game, and choose the playing mode.
  5. Set your preferred betting amount.
  6. Start spinning the reels.

To win, you need to land matching symbols and form winning combinations in adjacent reels, starting from the first reel.


In this section, you can find the answers to some of the most common questions regarding the slot and its features. So, let’s look through it.

What is the RTP of Castle of Terror?

The highest RTP rate of this slot machine is 96.72%.

Where Can I Play at Demo Castle of Terror Slot?

If you want to play Castle of Terror for free, you can load the demo version available in most online casinos. On our website, you can find the list of all popular gambling sites offering the game’s fun version. 

What is the Maximum You Can Win on the Castle of Terror Slot by Big Time Gaming?

The maximum you can expect from this game is 61,720x the stake. 

Where Can I Play Castle of Terror Slots Online?

All licensed and top-rated online casinos have this slot machine in their game library. Just check them out at, pick the one that suits your needs, load the game and start playing. 

Can I Play at Castle of Terror on Mobile?

Yes, you can! The game is optimized for both Android and iOS gadgets. So, you can easily access and play this slot directly on your mobile phone or tablet. 

What Other Games Can I Play Similar to the Castle of Terror Slot from Big Time Gaming?

The other slot machines with similar features and themes from this game provider include Survivor Megaways, The Final Countdown, Book of Gods, and Max Megaways.