Cthulhu is a 5x3 video slot. The game is played with 10 bet lines (fixed), orientated from left to right. The slot features 5 high paying symbols and 5 low paying symbols. The slot also features Wilds and Scatter symbols.

The ‘WILD’ symbol can substitute any symbol other than the scatter.

The ‘SCATTER’ symbol appears on reels 1, 3 and 5 and will trigger 10 free spins of the bonus game.


During the bonus game, each time an ‘ADVENTURER’ symbol appears it has a chance of becoming a ‘STICKY WILD’ symbol.

A ‘STICKY WILD’ symbol will not block a ‘SCATTER’ symbol from appearing. In this case the ‘STICKY WILD’ will become a ‘TRANSPARANT STICKY WILD’ symbol.

The ‘SCATTER’ symbol will retrigger an additional 10 freespins of the bonus game if it appears on reels 1, 3 and 5.

All wins multiplied by bet staked per line. Multiple wins across multiple paylines will be added together.


  • Select your bet.

  • Press the Spin button to start the game.


  • To calculate your total payline win, calculate all payline wins and add them together.

  • To calculate a single payline win, count the number of identical symbols lined up in sequence on the line starting from the left most reel.

  • If three or more identical symbols are lined up, find the win value in the dynamic Pay Table. There you can find the value for all symbols for 3 in a row, 4 in a row and 5 in a row. Only the highest winning combination per line is paid out.

  • If the winning combination starts with three wilds, there can be many ways to interpret the win. In this scenario, only the highest win combination is paid out.

  • After the Free Spins round is completed, all wins are added to any win from the game that activated the Free Spins.

  • There can be a discrepancy between the sum of the individual wins in collection Free Spins from what is displayed in the total win end screen. The total win end screen displays the final rounded win.

  • maximum payout of this slot machine is x8004. Any wins in excess of this amount will be instead limited to this maximum payout.


    Click the options icon to expand or collapse the options tray.

  • Home Button

    – Returns the player to the game lobby.

    • Pay Table – Find how much each symbol pays out, explanations of the game features, and information on the paylines.

    • Game Settings – Change the game speed, sound volume, and other settings.

    • Game History – If this feature is enabled on your gaming website, you may review and replay your last 10 game rounds.

    • Game Rules – Opens the rules of the game.

    • Sound – Turns the sounds on or off.

    • Cash Bet Toggles – Right most arrow Increases and left most arrow decreases the current bet.

    • Bet – Displays the current bet.

    • Spin Button – Places the bet and spins the reels. When the reels are spinning, the spin button transforms into the Stop Button. Pressing the Stop Button stops the reels immediately.

    • Autoplay (if Available) – Players can make the game play without pressing the spin button each time. Choose the number of rounds to auto play by pressing the autoplay button. Players can choose additional conditions for when to stop autoplay in the Game Settings. The loss limit in some game client versions prevent players from losing above a set limit during an autoplay session. Pressing the autoplay button a second time stops the autoplay.

    • Win – Displays the win for the current or last win payout step.

    • Balance – Displays the player's account balance.


    • Space Bar – Press the space bar to spin on desktop.


    • The overall theoretical return to player is 95.4%

    • The maximum recorded win is x8004 and happened once in simulated game rounds


    • The reels are spun with a fair and equal chance for each stop position by a certified random number generator. For more information, visit http://www.yggdrasilgaming.com/en/about-us


    • If your game is interrupted during play, you may replay the game round after restarting the game within 1 hour after interruption. After that time, any winnings from interrupted game will be added to your account. If you choose to skip the replay, your win will be added to your balance immediately.

    • In any situation where the replay-functionality is not sufficient, please contact the support team of your gaming website.

    • In the event of malfunction of the gaming hardware/software, all affected game bets and payouts are rendered void and all affected bets are refunded.

    • This is game rules version 1, dated 26/07 2021. To make available any previous version, please use the contact form at http://www.yggdrasilgaming.com/en/contact-us

    The maximum win from a single game is £250,000 or 10,000xBet - whichever is reached first (or currency equivalent. Other Operator limits may apply).

    Last modification date: 12/8/2021