Castle of Terror Slot Review

4.5/5
Based on our expert’s review. Reviewed by
Big Time Gaming Slots
Review by
Chris Taylor
Updated: 26/10/2022
Review by
Chris Taylor
Updated: 26/10/2022

Satisfy your thirst with the Castle of Terror slot from Big Time Gaming. With 6 reels and 4,096 ways to win, the Holy Water feature sees the high value character symbols transforming into wilds and increasing the win multiplier. This applies in both free spins features. In the Megascatter Enhanced Free Spins feature, Holy Water increases the multiplier by 2 each time, with no limits. Offering a 96.72% RTP rate and 61,720 x bet max wins, sink your teeth into our Castle of Terror review.

Max Win
61,720 x bet
Play
T&Cs Apply

18+ new players only. Minimum deposit: £20. Maximum £100 bonus. Max bet with an active bonus: £2. Wagering requirement 100% match bonus: 30 times sum of deposit + bonus. Max redeemable from welcome bonus: £500. 100 Free Spins are given out 20 per day on Book of Dead for 5 days in a row, log in each day is required. Max Free Spins winnings: £100. Winnings from Free Spins are credited as bonus money with a wagering requirement of 45 times. Free Spins expire after 3 days. Some games may not be played with a bonus. Games may contribute differently when wagering a bonus. Play Responsibly! www.begambleaware.org. #ad

Provider
Big Time Gaming
Type of Slot
Video Slot
Theme
Horror
Reels
6
Paylines
4,096
Stakes Range
20p to £8
Bonus Features
Yes (5)
Free Spins/Multiplier
12-Unlimited/Unlimited
Max Win
61,720 x
RTP
96.72%
Volatility
Very High

Castle of Terror Demo

18plus uk-gambling-commission online-slot-co-uk-logo agechecked-verification-provider
T&Cs Apply 18+ new players only. Minimum deposit: £20. Maximum £100 bonus. Max bet with an active bonus: £2. Wagering requirement 100% match bonus: 30 times sum of deposit + bonus. Max redeemable from welcome bonus: £500. 100 Free Spins are given out 20 per day on Book of Dead for 5 days in a row, log in each day is required. Max Free Spins winnings: £100. Winnings from Free Spins are credited as bonus money with a wagering requirement of 45 times. Free Spins expire after 3 days. Some games may not be played with a bonus. Games may contribute differently when wagering a bonus. Play Responsibly! www.begambleaware.org. #ad
18plus uk-gambling-commission online-slot-co-uk-logo agechecked-verification-provider
T&Cs Apply 18+ new players only. Minimum deposit: £20. Maximum £100 bonus. Max bet with an active bonus: £2. Wagering requirement 100% match bonus: 30 times sum of deposit + bonus. Max redeemable from welcome bonus: £500. 100 Free Spins are given out 20 per day on Book of Dead for 5 days in a row, log in each day is required. Max Free Spins winnings: £100. Winnings from Free Spins are credited as bonus money with a wagering requirement of 45 times. Free Spins expire after 3 days. Some games may not be played with a bonus. Games may contribute differently when wagering a bonus. Play Responsibly! www.begambleaware.org. #ad

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100% Bonus up to £100 + 20 Bonus Spins
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18+. New customers. Opt-in required. 20 Bonus Spins on “Sahara Riches Cash Collect” at 10p per spin and 100% Deposit Bonus up to £100 on first deposit (payment method and play restrictions apply). Min. deposit £10. 30x wagering for Bonus Spins and Deposit Bonus (game weighting applies). Max. £5/spin or £0.50/line. 30 days expiry. Please gamble responsibly • www.begambleaware.org #ad

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Castle of Terror Slot RTP, Details & Wager Limits

Reels/Paylines: 6 reels + 4,096 ways to win

Stakes Range: 20p to £8 per spin

RTP: 96.72%

Max Win: 61,720 x bet per spin

The Castle of Terror slot is played with 6 reels, 4 rows and 4,096 ways to win. It’s a surprise it’s not a Megaways game but some of Big Time Gaming’s best slots have the same setup (such as Danger High Voltage and Lil’ Devil). Winning combinations are formed when 3+ matching consecutive symbols from left to right begin from the leftmost reel, in any position.

The bet options vary from 20p to £8 per spin. Head to the Stake box and then use the arrows to change your stake. Outside the UK, you will find an Auto Play function where up to 100 autospins alongside single win and loss limits can be used. BTG slots don’t have a Turbo or Quick Play mode.

The Castle of Terror RTP is 96.72%. This is very high compared to the slots average of 96%. It’s also better compared to other slots from the provider. The volatility is very high as expected. Finally, the hit frequency rate is 31.7% meaning a win every 3.15 spins on average.

When it comes to exposure, the most you can win per base game spin is 29,690 x your total bet. In the free spins, the max win is 61,720 x your total bet. This is due to the unlimited win multipliers (more details below).

Theme – love at first bite

Theme: Vampire/Horror

High Value Symbol: Lady Character

Compatibility: Mobile, Tablet, Desktop

castle-of-terror-slot-base-game

With a vampire/horror theme, the Castle of Terror slot was released on the 26th of October 2022, just in time for Halloween. Set in what looks like Transylvania, you will see a creepy castle (of terror) in the backdrop. Graphically, it reminds me of Playtech’s Full Moon Fortunes.

With a harrowing soundtrack, symbols on the reels include A, K, Q, J, 10 and 9 royals. The better paying symbols include 4 characters who can transform into vampires. There’s the groundskeeper, maid, lord and lady. The lady character the best paying symbol with 3, 4, 5 or 6 awarding 1, 5, 10 or 50 x your total bet.

There is also a Wild symbol that substitutes for all symbols above. Finally, you have 2 scatters: the Silver Castle Scatter and Gold Castle Megascatter. The former can appear on reels 1 to 5 with the latter appearing on reel 6 only.

Symbol Payouts/Info
castle-of-terror-slot-9-symbol9 3, 4, 5 or 6 = 0.1, 0.15, 0.2 or 0.3 x bet
castle-of-terror-slot-10-symbol10 3, 4, 5 or 6 = 0.1, 0.15, 0.2 or 0.3 x bet
castle-of-terror-slot-j-symbolJ 3, 4, 5 or 6 = 0.15, 0.2, 0.25 or 0.4 x bet
castle-of-terror-slot-q-symbolQ 3, 4, 5 or 6 = 0.15, 0.2, 0.25 or 0.4 x bet
castle-of-terror-slot-k-symbolK 3, 4, 5 or 6 = 0.2, 0.25, 0.3 or 0.5 x bet
castle-of-terror-slot-a-symbolA 3, 4, 5 or 6 = 0.2, 0.25, 0.3 or 0.5 x bet
castle-of-terror-slot-groundskeeper-symbolGroundskeeper 3, 4, 5 or 6 = 0.25, 0.3, 0.4 or 0.6 x bet
castle-of-terror-slot-maid-symbolMaid 3, 4, 5 or 6 = 0.25, 0.3, 0.4 or 0.6 x bet
castle-of-terror-slot-lord-symbolLord 3, 4, 5 or 6 = 0.3, 0.4, 0.5 or 1 x bet
castle-of-terror-slot-lady-symbolLady 2, 3, 4, 5 or 6 = 0.5, 1, 2, 3 or 50 x bet
castle-of-terror-slot-wild-symbolWild Substitutes for all symbols except scatter
castle-of-terror-slot-silver-castle-scatter-symbolSilver Castle Scatter 3+ triggers Free Spins feature
castle-of-terror-slot-gold-castle-scatter-symbolGold Castle Scatter Triggers Megascatter Enhanced Free Spins feature

Castle of Terror Mobile

Produced by Big Time Gaming with HTML5 technology, you can sink your teeth into Castle of Terror on mobile, PC, laptop and/or tablet devices. The 6×4 layout works well on smartphones too, including devices operating with iOS, Android and Windows.

castle-of-terror-mobile-slot

Castle of Terror Bonus Features

The Castle of Terror slot comes with 5 bonus features. The random Holy Water feature transforms any of the 4 character symbols into wilds as well as increasing the win multiplier. Then you have the 2 free spins features where any character becomes a wild and increases the win multiplier, with no limits, by 1 or 2. Finally, there’s the Win Exchange element where you can exchange your wins to play the free spins.

Holy Water feature

castle-of-terror-slot-holy-water-feature

On every base game spin, there is a chance that 2 or more positions on the 4 centre reels can be hit by Holy Water. Any gardener, maid, gentle or lady symbol hit by Holy Water will become wild and increase the win multiplier by 1. This is known as the Holy Water feature.

Free Spins feature

The Free Spins feature is triggered when you land 3 or more Silver Castle Scatters on reels 1 to 5, in any position. 3, 4 or 5 scatters will award 12, 15 or 18 free spins respectively.

With the win multiplier starting at 1x, the Holy Water feature is in play for every free spin. Every time a lady, gentleman, maid or gardener character lands, it becomes wild and increases the win multiplier by 1. Each time the win multiplier reaches a multiple of 20 (i.e. 20x, 40x etc), you hit the blood bank. An extra 6 free spins are awarded each time, with no limits.

Megascatter Enhanced Free Spins feature

castle-of-terror-slot-megascatter-enhanced-free-spins-feature

The Megascatter Enhanced Free Spins feature is played when you get 3 or more scatters on the reels with 1 being a Gold Castle Megascatter. As with the standard feature, 3, 4, 5 or 6 scatters will give you 12, 15, 18 or 21 free spins respectively.

The win multiplier begins at 2x and increases by 2 every time a lady, gentleman, maid or gardener becomes wild. When the win multiplier reaches a multiple of 20, you will also get 6 additional free spins.

Win Exchange feature

The Castle of Terror slot also comes with a Win Exchange feature. When you win 100 x bet or higher, you can exchange the win for entry to the Free Spins feature (with 12 free spins). Just click on the Exchange button to enable it.

If you win between 25 and 100 x your total bet, you can exchange for the chance to enter the Free Spins feature. You will gamble via a wheel which has both a green and red segment. Land on the green segment to win free spins. If you land on the red segment, you will lose your win and revert back to the base game.

Bonus Buy feature

For non-UK players, you will see a Bonus Buy button. When pressed, it will trigger the Bonus Buy feature. There are 2 free spins options with the RTP increasing marginally to 96.73%. You will get 12 free spins in both options:

Option Cost
Free Spins feature 70 x bet
Megascatter Enhanced Free Spins feature 200 x bet

Castle of Terror Summary – increasing win multipliers key to fangtastic wins

Ratings
Theme & Symbols








Sounds & Music








Bonus Features








RTP (96.72%)








Max Win (61,720 x)








Originality








The Castle of Terror slot isn’t the best designed game I’ve come across. The graphics are a little old-skool for my liking. In terms of the gameplay, I’m glad it’s not another Megaways game.

The Holy Water feature transforms the high value character symbols into wilds and increases the win multiplier. This applies on every free spin too. However, it’s all about the Megascatter Enhanced Free Spins feature as the win multiplier rises by 2 every time a character symbol becomes wild. The Win Exchange element is something we’ve seen a few times already though.

What I do like about Castle of Terror is the very high RTP rate of 96.72%. Furthermore, the max win of 61,720 x bet is significantly higher than that of other 4,096 ways to win Big Time Gaming slots (Lil’ Devil offers 36,403 x bet and Danger High Voltage 15,746 x bet).

In summary, Castle of Terror is a decent horror themed slot. Whilst the gameplay doesn’t offer anything innovative or unique, the max win potential and high return rate gives it plenty of bite. If you want a truly terrifying slot, Nolimit City’s Mental slot is a set in an asylum and benefits from multipliers up to 9,999x and 66,666 x bet top wins.

If you like horror themed slots, I recommend you a look at our Halloween Slots section. You will find the likes of Full Moon Fortunes (Playtech), Fat Drac (Push Gaming), Immortal Romance (Microgaming) and Book of Shadows (Nolimit City).

Pros
  • 61,720 x bet max wins
  • Win multiplier rises by 2 in Megascatter Enhanced Free Spins feature
  • High 96.72% RTP rate
Cons
  • Nothing innovative or unique

Castle of Terror FAQs

What is the Castle of Terror RTP?

The Castle of Terror RTP is 96.72%. This is significantly higher than the 96% online slots average. The volatility also very high with the bigger wins coming in the free spins features.

What is the Castle of Terror maximum win?

The most you can win is 61,720 x your total bet on a free spin. The key to big wins is from the increasing win multiplier. In the base game, you can win up to 29,690 x bet per spin.

Are there any Castle of Terror free spins?

Yes, there are 2 Free Spins features, standard and enhanced versions. In the Megascatter Enhanced Free Spins feature, a character symbol becoming wild sees the win multiplier increase by 2 each time with no limits.

Can I play the Castle of Terror demo?

Yes, the Castle of Terror demo can be played here at Online-Slot.co.uk. Sink your teeth into this horror themed slot on mobile, tablet, laptop and/or PC devices.

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