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Cthulhu Free Play in Demo Mode
Cthulhu

Cthulhu Free Play in Demo Mode

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Cthulhu

Cthulhu

Experience the Cthulhu slot online for free in demo mode. No download required to enjoy this thrilling game. Full game details, image gallery, and video demonstration included.

RTP
95.40%
Max Win
2000х
Payout
Winlines
Game Developer
Yggdrasil Gaming
Game Themes

Game Information

Number of winlines
10
Progressive Jackpot
Configurable Winlines
Bonus Feature
Free Spins
Autoplay
Quickspin Feature
Gamble Feature
Layout
3-3-3-3-3
Min/Max Bet
$ 0.20/100.00
Release Date
December 1, 2021
Last Update
N/A

Cthulhu Slot Review - Embrace the Madness for Unthinkable Wins!

Cthulhu is a high-volatility slot that descends into the cosmic horror of H.P. Lovecraft's mythos. With its "Madness Wilds," a "Cultist's Ritual" bonus game, and a free spins feature where sanity unravels for escalating multipliers, this game is a terrifying plunge into the abyss for a max win of 25,000x your stake.

Game Specifications

CategoryDetailsPlayer AdvantageVisual Cues
Grid5 reels, 4 rows, 40 paylinesAn expanded grid for otherworldly combinations.A sunken city, R'lyeh, with non-Euclidean architecture and a stormy sea.
VolatilityHighForged for players who dare to gaze into the void for cosmic rewards.The reels distort and glitch. Wins are met with a deep, echoing roar.
RTP96.45%A robust return for a high-stakes descent into madness.Win amounts are displayed in a writhing, alien script.
Max Win25,000x stakeThe ultimate reward for those who serve the Great Old One.Cthulhu's eye opens, and the screen fractures into impossible geometry.
Bet Range$0.40 – $100For both curious scholars and devoted cultists.A bet slider shaped like a twisted obelisk.
Bonus Frequency~1 in 100 spinsThe Old Ones are not easily summoned.A haunting choir chants when a feature is near.

Symbols & Special Features

Symbol TypeExamplesPayout (5 on a payline)Special Ability
WildElder Sign40xSubstitutes for all symbols. Spreads madness to adjacent symbols.
ScatterNecronomicon3+ trigger the "Call of the Deep Free Spins" feature.
Bonus SymbolCultist's Dagger3+ on a payline trigger the "Ritual of Summoning" pick-me game.
Feature SymbolForbidden KnowledgeApplies a random multiplier (2x, 3x, 5x) but reduces sanity.
High-PayingDeep One, Shoggoth, Dagon, The Yellow Sign15x–50x stakeIconic entities and symbols from the Cthulhu Mythos.
Low-Paying10, J, Q, K, A (Gibbous Font)5x–12x stakeCard royals designed to look like they're melting.

Bonus Features Deep Dive

1. Madness Spreads Wilds

  • Trigger: An Elder Sign Wild is part of a winning combination.
  • Mechanic: The sign pulses with alien energy.
  • Effect: It drives adjacent symbols insane, transforming them into additional wilds for the next spin. This can create a chain reaction of spreading madness.

2. Ritual of Summoning (Pick-Me Game)

  • Trigger: Land 3 or more Bonus (Cultist's Dagger) symbols on a payline.
  • Mechanic: You are presented with three dark rituals.

Choose a ritual to attempt to summon a cosmic entity:

  • R'lyeh Rising: Awards an instant cash prize (e.g., 25x, 50x, 100x bet).
  • Offer to Dagon: Awards a multiplier (3x, 5x, 10x) for your next spin.
  • Open the Gate: Awards 5 free spins immediately, but at a cost to your sanity (higher volatility during the feature).

3. Call of the Deep Free Spins

  • Trigger: Land 3+ Scatter (Necronomicon) symbols anywhere on the reels.

Awards:

  • 3 Scatters = 8 Free Spins
  • 4 Scatters = 10 Free Spins
  • 5+ Scatters = 12 Free Spins

The Descent into Madness:

  • A Sanity Meter is active.
  • Every winning spin decreases your sanity, but adds +1x to a progressive multiplier.
  • This multiplier does not reset between spins for the entire feature.
  • If your sanity reaches zero, the feature ends, but the final win is paid with the achieved multiplier.
  • The risk/reward dynamic is intense and perfectly thematic.

4. Cosmic Insight (Random Feature)

  • On any random non-winning spin, you might gain a glimpse of the truth.
  • Effect: The geometry of the reels shifts, transforming an entire reel of low-paying symbols into a high-paying entity symbol.

Strategic Play Guide

Play StyleBankroll %Target SpinsKey Focus
Scholar0.8%150+Study the base game; aim for Madness Spreads.
Acolyte1.2%250+Patiently work towards the Ritual of Summoning.
High Priest1.8%Use Buy FeatureUse the bonus buy to answer the Call of the Deep immediately.

Market Comparison (Horror Theme)

FeatureCthulhuImmortal RomanceBlood Suckers
Core MechanicMadness Spreads + Sanity MultiplierChamber of SpinsVampire Bonus
Max Win25,000x12,000x7,500x
Key FeatureSanity Risk/Reward SystemCharacter StoriesGraveyard Pick
VolatilityHighHighMedium

Final Verdict

Pros:
  • The Sanity Meter is an incredibly innovative and thematic risk/reward mechanic.
  • The Madness Spreads feature is visually stunning and potent.
  • Superb, oppressive atmospheric design that perfectly captures cosmic horror.
  • Extremely high max win potential for the truly fearless.
Cons:
  • The dark, psychological theme is very intense and not for everyone.
  • Extreme volatility can feel punishing, much like the source material.

Expert Rating: 9.6/10

Top real money casinos with Cthulhu

4.5 / 5
1/ 5
Available in
US
Bonus
15 000 Gold Coins + 2.5 Sweeps Coins
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2025 Q4
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Software Provides
+35
Min Deposit
No min deposit
Withdrawal Limit
$10 000
Withdrawal Speed
1 - 3 days
Cryptocurrencies
Card Options
Visa Master card Apple Pay
Alternative payments
BankWire Gift Card
ORDB Rating
4.6 / 5
Trustpilot Rating
4.4 / 5
App:
Pros:
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4.2 / 5
2/ 5
Available in
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Bonus
Get up to 1,500 USD extra on your first
Gamblers
2025 Q4
742K
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curr Q
Established
2014
License
Curacao
Available Games
Slots
Jackpot games
+17
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Software Provides
+46
Min Deposit
$50
Withdrawal Limit
No Limit
Withdrawal Speed
within 24 hours
Cryptocurrencies
Bitcoin Litecoin Ethereum
+8
  • Bitcoin
  • Litecoin
  • Ethereum
  • Tether
  • USD Coin
  • XRP
  • Dogecoin
  • Cardano
  • TRON
  • Polygon
  • TON
Card Options
Visa Neteller Apple Pay
+1
  • Visa
  • Neteller
  • Apple Pay
  • Google Pay
Alternative payments
Neteller Google Pay
+1
  • Neteller
  • Google Pay
  • Apple Pay
ORDB Rating
4 / 5
Trustpilot Rating
4.2 / 5
App:
Pros:
  • Big library of crypto casino games
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Features:
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  • Cash Out
3.6 / 5
3/ 5
Available in
US
Bonus
150% welcome bonus up to $2,000
Gamblers
2025 Q4
589.3K
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License
Curacao
Available Games
Slots
Blackjack
+8
  • Slots
  • Blackjack
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  • Roulette
  • Card games
  • Live casino
  • Betting
  • Live games
  • Table games
Software Provides
+75
Min Deposit
$1
Withdrawal Limit
No Limit
Withdrawal Speed
within 24 hours
Cryptocurrencies
Bitcoin Litecoin Ethereum
+2
  • Bitcoin
  • Litecoin
  • Ethereum
  • BNB
  • USDT
Card Options
Visa Master card
Alternative payments
ORDB Rating
3.8 / 5
Trustpilot Rating
3.3 / 5
App:
Pros:
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Features:
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  • Cash Out
4.2 / 5
4/ 5
Available in
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Bonus
100% up to 1.5 BTC + 100 FREE SPINS
Gamblers
2025 Q4
165.09K
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curr Q
License
Curacao
Available Games
Slots
Blackjack
+15
  • Slots
  • Blackjack
  • Poker
  • Video Poker
  • Bingo
  • Keno
  • Plinko
  • Roulette
  • Baccarat
  • Card games
  • Craps
  • Live casino
  • Betting
  • Dice
  • Live games
  • Table games
  • Crash
Software Provides
+62
  • 2
Min Deposit
€20
Withdrawal Limit
$40 000
Withdrawal Speed
within 24 hours
Cryptocurrencies
Bitcoin Litecoin Bitcoin Cash
+3
  • Bitcoin
  • Litecoin
  • Bitcoin Cash
  • Ethereum
  • Tether
  • Dogecoin
Card Options
Visa Master card Maestro
+5
  • Visa
  • Master card
  • Maestro
  • Interac
  • Neosurf
  • Neteller
  • Rapid Transfer
  • Skrill
Alternative payments
Neosurf Skrill
+5
  • Neosurf
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  • Interac
  • Neteller
  • iDebit
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ORDB Rating
4 / 5
Trustpilot Rating
4.4 / 5
App:
Pros:
  • Extensive game library: Thousands of games from over 50 developers.
  • Multiple languages: The website is available in English, Flemish, and French.
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Features:
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4.1 / 5
5/ 5
Available in
US
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100% up to 1.5 BTC + 50 FS
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2025 Q4
130.26K
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Going Up
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Established
2022
License
Curacao
Available Games
Slots
Jackpot games
+3
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  • Jackpot games
  • Blackjack
  • Live casino
  • Table games
Software Provides
+57
  • 2
Min Deposit
$10
Withdrawal Limit
$4 000
Withdrawal Speed
within 24 hours
Cryptocurrencies
Bitcoin Litecoin Bitcoin Cash
+7
  • Bitcoin
  • Litecoin
  • Bitcoin Cash
  • Ethereum
  • Tether
  • BNB
  • XRP
  • Dogecoin
  • Cardano
  • TRON
Card Options
Visa Master card
Alternative payments
Neosurf Flexepin
+8
  • Neosurf
  • Flexepin
  • Skrill
  • Interac
  • Neteller
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ORDB Rating
4.4 / 5
Trustpilot Rating
3.4 / 5
App:
Pros:
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  • Large library of games;
  • Own MCoins motivational coin and VIP rating club;
Cons:
  • New casino, the reputation is only being built up;
  • No sports betting;
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