Cthulhu is an Yggdrasil and Gluck Games slot that brings sorcery, magic and mystics to your game screen. Set sail with the intrepid adventurer and pirate, as the former seeks to fight the beastly Cthulhu. This is a wonderful slot with some exciting features that are detailed further in our Cthulhu slot review.

Rating: 76% | Made By Yggdrasil | Reviewed On

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An Introduction to Cthulhu

Cthulhu is a mystery and horror-themed slot that revolves around the horrific creature from the story Call of the Cthulhu. Sharing similarities with video games based on the tale, this slot features monsters which attack the characters on the reels. Once in the Craze of Cthulhu Bonus, the beast itself shows up. However, with the help of the wizard and adventurer, you can prevail and earn sticky and transparent sticky wilds into the bargain.

Cthulhu slot layout
Cthulhu slot layout

Become immersed in the Craze of Cthulhu Bonus for some magical sticky wild gameplay and wins galore!

Betting and Layout

The Cthulhu slot game has a simple layout of five reels, three rows and ten fixed paylines. With regard to regular symbols, there are ten : five high-value icons and five low-value ones. Our Cthulhu slot review shows that this slot has medium-high volatility, which tends to award average to substantial wins. The average wins may be a little frequent, while the bigger wins happen less frequently.

The Cthulhu RTP is 95.42%, which is a tad lower than the average RTP for modern video slots. You can play this slot with at least 0.20 coins and up to 20 coins per spin. Lucky players of this slot can walk home with a maximum reward of 8,004x their wager.

This slot has an eerie soundtrack, complemented by a sharp, sword-swinging sound driving home the theme with every spin. Like most slots from this developer, the graphics are elegantly done, with two beast statues flanking the game grid.

Key Information

Developer Yggdrasil
RTP 95.42%
No. Reels 5
No. Rows 3
Volatility Medium to High
Min. Wager 0.20
Max. Wager 20
Max. Payout 8,004x

Gameplay and Features

The Craze of Cthulhu Bonus activates randomly when the adventurer shows up in the base game. Once this happens, the weaker  creatures on the reels will start attacking the adventurer. If the adventurer defeats them, he turns sticky and will subsequently battle Cthulhu himself.

The sticky wilds will in turn transform into transparent sticky wilds, offering a fantastic bonus game. During this feature, it’s possible for scatter symbols to appear, and three consecutive scatters will activate the Free Spins feature.

Cthulhu wild symbols
Cthulhu wild symbols

Regular Symbols

Regular symbols consist of gothic style icons that reflect the horror theme of the Cthulhu slot game, The low-rewarding symbols include topaz and card suits, such as spade, diamond, club and heart.

High-value regular symbols on the reels are the musician, sorcerer, sailor, the adventurer and the wizard. The wizard provides the biggest reward of 50x your stake on a default one-coin bet.

Scatter Symbols

The beast is the scatter symbol that leads to the Cthulhu Free Spins feature when you land three on the reels. The scatter only appears on the 1st, 3rd and 5th reels.

Cthulhu free spins
Cthulhu free spins

Free Spins

Though the Cthulhu Free Spins feature is not a stand-alone feature, it’s worth exploring. During the Craze of Cthulhu Bonus, if you land three scatter symbols on the reels, you will activate this feature. This will award ten free spins, during which the sticky wilds will remain on the reels.

With the sticky wilds possibly turning to transparent sticky wilds, your chances of winning could increase. What’s more, if you land more scatters on the reels, additional 10 free spins will be awarded. On the whole, there’s no limit to the free spins you can win in this feature.
Wild Symbols

The wild symbol replaces all other symbols when making a winning combination, save for the scatter. Just like the wizard symbol, the wild awards 50x your bet, which is the highest symbol win available. The wild will turn to sticky wild and sticky transparent wild in the bonus game.

How to Win at Cthulhu

This Yggdrasil title has the same payout pattern as many other slots. So you need to land 3 or more identical symbols on the paylines from left to right. Landing the bigger symbols will reward more, especially the wizard, wild and adventurer.

Also, try to activate the Craze of Cthulhu Bonus, as you can unlock free spins this way. While at it, the battles and the wild transformations that follow could help create better winning potentials.

Furthermore, you can play this slot for free at any of the casinos on our list. Most of the casinos offer a demo version for you to practise and understand this slot clearly before wagering real money. Should you create a casino account, we advise doing so at one of our top-rated casinos on this page. They offer an exciting welcome bonus, a wide variety of games and robust security.

Cthulhu slot paytable
Cthulhu slot paytable (1)

Payout Structure for Cthulhu

Though the Cthulhu RTP is only 95.42%, the payout structure isn’t too bad. Hence, a default one-coin bet will offer 50x your bet for landing five wizards on the reels. Land five adventurers or pirates on the reels and receive 35x or 25x your stake, respectively.

Cthulhu slot paytable (2)
Cthulhu slot paytable (2)

The sorcerer or musician symbols will offer 20x or 15x your wager, respectively for five on the reels. Landing five topaz, heart or club symbols will reward you with 10x, 8x or 5x your bet, respectively. You’ll receive 4x or 3x your stake for landing 5 diamond or spade symbols on the reels, respectively.


Whether you are a fan of horror-themed slots or not, this is an all-round entertaining title. A maximum win potential of 8,004x your wager from the Craze of Cthulhu Bonus will certainly help you to enjoy this slot. Free spins, sticky wilds and transparent sticky wilds all make the game even more exciting.

If you wish to be part of the phenomenal gaming experience of this slot, you can join one of our top-rated casinos. These sites provide a truly refreshing experience through various bonuses, innovative banking methods, solid security and user interface design. Sign up today to receive your welcome bonus!


Can I play Cthulhu for free?

Absolutely. You can play this slot for free at most of the recommended casinos on this page. Many of them offer a demo version for free play of games without any real money deposit or risk involved.

Does Cthulhu have a free spins feature?

Yes. There’s a Cthulhu Free Spins feature, where sticky wilds and transparent sticky wilds increase your chances of landing a substantial win.

What is the volatility of Cthulhu?

This slot has a medium to high volatility, which means the rewards could range from average sized payouts to massive wins. Although the average wins tend to happen a little more often than the bigger ones.

What is the max win of Cthulhu?

8,004x your bet is the maximum win available from this slot.

Can I play Cthulhu on my mobile or tablet?

Yes. This game is compatible with the iOS and Android smartphones and tablets. It is also compatible with mobile browsers such as Safari, Internet Explorer and Firefox. Some of the casinos have a mobile app, you may download and play there.

Who makes the Cthulhu slot game?

This slot is a collaboration between Yggdrasil and Gluck Games.

Which online casinos have Cthulhu?

Use the list of Cthulhu casinos to see all online casinos that have Cthulhu. We filter the casino top list to only show Cthulhu casinos that accept players from your location.

What is the Return to Player (RTP) for Cthulhu?

The Cthulhu RTP is 95.42%. An RTP of 95.42% puts Cthulhu among slots with a below-average Return to Player. An Average RTP is at least 96%, and a high RTP at least 98%.