Thunder of Thor

Welcome to Valhalla Saga: Thunder of Thor™ Video Slot with Free Games and Thunder of Thor Wild Multipliers. Win up to 10,000x total bet!


Valhalla Saga: Thunder of Thor™ is a 20 line, 5 x 3 Video Slot featuring Thor Free Games and epic Thunder of Thor Wild Multipliers.


  • Experience PowerLinks™ in the Free Games feature with scatters becoming a special reel zone. PowerLinks™ features always guarantee a win!

Thunder of Thor Wild Multipliers

  • The Thunder of Thor modifier can be triggered on any spin. This will create wild symbols which will be added to the reels featuring wild multiplier of either x2, x5, x10, x25, x50 and x100.

  • All wild symbols are awarded the same multiplier.

  • Wild Multipliers are only applied once on any winline.

  • The Thunder of Thor modifier only appears in the base game, and does not guarantee a win.

Bonus Respin

  • The Bonus respin can be triggered on any spin where the player has 4 scatter symbols in view. This will respin the remaining reels to give a second chance at gaining the 5th scatter to trigger the Free Games. Bonus Respin does not guarantee the Free Games.

Getting and Playing Free Spins

  • Free Games are triggered with 5 or more scatters in view.

  • This will award 5 Free Games with the triggering scatter symbols becoming special reel zones which will guarantee a prize at the end of Free Games.

  • If any additional scatter symbol lands in any of the special reel zones the prize at the end of Free Games is upgraded.

  • Mini, Minor, Major and Mega prizes can only be won from Free Games from 2 or more scatter hits on any special reel zone.

  • Free Spins are played with the same bet as the base game, and cannot be retriggered.

Bonus Buy

  • Bonus Buy is available for 60x total bet subject to jurisdiction. This will automatically award the Thor Free Games Bonus.


  • 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.

  • The above doesn't include Free Spin symbols which do not need to be on a payline to award a prize.

  • 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 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.


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

  • Pay Table - find how much each symbol pays out, explanations of the game features, and information on the ways to win.

  • Game Rules - opens the rules of the game.

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


  • Options Tray - players can view the paytable, read the game rules or look back over their play history.

  • Sound Toggle - turn the sounds on or off.

  • Exit Button - exits the game and returns the player to the main menu.

  • Balance - displays the player's account balance.

  • Win - displays the win for the current or last win payout step.

  • Bet - displays the current bet.

  • Bet Value - changes the bet size by changing the bet value.

  • 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.

  • 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.

(Some features and options may not be available in your jurisdiction)

Return to Player

  • The overall theoretical return to player is 95.9%


  • The reels are spun with a fair and equal chance for each stop position by a certified random number generator. For more information, visit

Additional information

  • 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 an 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 31/08/2021. 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: 11/17/2021