Thunderstruck II Slot Review

Thunderstruck II Slot Review

Our score 4.7 4.7 /5
User rating
Paylines: +243

Thunderstruck II is a classic slot game from Games Global with 5 reels and 243 paylines.

Theme Norse mythology
No. of Reels 5
Game type Video Slot
Release Date 2010
Bonus Rounds No
Software provider Games Global
Scatter Yes
Free spins Yes
Updated April 1, 2025

Game Screenshots

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This slot has become iconic and a go-to game for many players with its epic Norse mythology theming and big bonus features. Spin the reels to enjoy wild symbols, a wildstorm feature to create up to 5 wild reels and a huge great hall of spins feature where there are 4 free spin modes to play in which offer rolling reels, multipliers and additional wilds. Spin the reels of Thunderstruck II today from as little as 30p for the chance to win up to 8,000x your stake.

If you think this could be the slot game for you, carry on reading our Thunderstruck II review for all the information you need to know about this game.

How to Play

The minimum bet per spin in Thunderstruck II is 30p and the maximum bet per spin is £15. Winning combinations are formed by landing 3 or more matching symbols across consecutive reels, starting from the leftmost reel.

The symbols on the reels of this game are:

  • 9
  • 10
  • J
  • Q
  • K
  • A
  • Viking longship
  • Valhalla
  • Valkyrie
  • Loki
  • Odin
  • Thor
  • Game logo wild
  • Thor hammer scatter

Jackpot

The maximum win available in Thunderstruck II is 8,000x your stake. In the base game, the highest value symbol on the reels is the Thor hammer scatter and it can award up to 200x your stake for 5 in a winning combination.

Special Features

There are 3 special features in the Thunderstruck II slot game including a wild symbol, a wildstorm feature and a great hall of free spins bonus round.

The game logo is the wild symbol and it can replace other symbols on the reels to help form new winning combinations and potentially award larger cash prizes.

At random, the wildstorm feature may trigger. Thor’s lightning bolts will then transform 1 to 5 reels into wild reels. Getting all 5 wild reels can lead to wins of 8,000x your stake.

The highlight of Thunderstruck II is the great hall of spin feature. This is triggered by landing 3 or more scatter symbols on the reels. The scatter symbol is Thor’s hammer. Plus, you will get an instant win of 2x, 20x or 200x depending on how many triggering scatters you landed. There are 4 free spins modes to play which are unlocked throughout the game:

  • Valkyrie free spins – activates from the 1st free spins trigger. Players are awarded 10 free spins plus a 5x multiplier. This can be retriggered to provide 20 free spins.
  • Loki free spins – activates from the 5th free spins trigger. Players are awarded 15 free spins and the wild magic symbols can appear on reel 3 to randomly transform symbols into additional wilds. Land 2, 3, 4 or 5 scatters to get an additional 1, 2, 3 or 4 free spins.
  • Odin free spins – activates from the 10th free spins trigger. Players are awarded 20 free spins plus Odin’s raven symbols can appear to randomly turn symbols into 2x and 3x multipliers. These multipliers can be combined to form a 6x multiplier.
  • Thor free spins – activates from the 15th free spins trigger. Players are awarded 25 free spins plus rolling reels are triggered. This means that each time a winning combination is formed on the reels, those symbols will be removed to allow new symbols to drop and potentially form more winning combinations. An increasing multiplier is also present that rises by 1x each time the rolling reels activates and it is applied to wins. This can reach a maximum of 5x.

Graphics and Sounds

Thunderstruck II is a Norse mythology themed slot game and while it was originally released more than 15 years ago, the graphics have been updated for a fresher look. Players will find many of the Norse gods on the reels including Valkyrie, Loki, Odin and Thor as well as other themed symbols such as Viking longships, Valhalla and Thor’s hammer. The low value symbols are the standard playing card symbols 9, 10, J, Q, K and A. An epic and lively soundtrack plays as you spin the reels, which works well with the overall Norse gods theme.

Conclusion

Thunderstruck II is an iconic slot in the online gambling world and is just as popular today as it was when it was released in 2010. While the graphics feel a little dated and the Norse mythology theme is common in online slots, the slot’s bonus features more than make up for this. The highlight of the game is the great hall of spins where players can progress through the 4 free spin modes to try and win the maximum of 8,000x your stake. Get started today with a minimum bet per spin of 30p.

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Jennifer Mcfadyen
Jennifer McFadyen
iGaming Specialist
The Slot Specialist & iGaming Reporter
Jennifer McFadyen is a slot specialist and iGaming journalist with years of experience analyzing online slots and industry trends. She provides detailed, transparent insights into RTP, volatility, bonus features, and game design, helping players navigate the latest releases. Beyond slot reviews, Jennifer covers iGaming news, casino platform evaluations, and industry developments, offering expert analysis on new game launches and responsible gambling updates.

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