Thunderstruck Slot Review

The Thunderstruck slot is a 5 reel 9 payline game powered by the impressive Microgaming and was created back in October 2003. With a Norse mythology theme, it has earned cult status and is still 1 of the internet’s most popular slot games. It offers big wins courtesy of the Free Spins feature where you can win up to 30 free spins with all wins subject to a 6x multiplier. With a 96.1% RTP, this iconic game offers max wins of 30,000 x stake per free spin. Find out more in our Thunderstruck review.

Where to Play Thunderstruck Slot

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Thunderstruck Slot, Details & Wager Limits

The Thunderstruck slot has 5 reels, 3 rows and 9 fixed paylines. To form a win, you need to land 3, 4 or 5 matching symbols across a payline, and beginning from reel 1. The exceptions are the 2 higher value symbols and the wild as you only need 2 in combination.

You can play from 9p to £45 per spin which is good as it caters to players with all types of bankrolls. Being produced in October 2003, it’s an oldie so newer concepts such as Autoplay and win/loss limits are not available. It does have a Quick Spin mode though in Settings.

The Thunderstruck RTP is 96.1% which is average for a slot game. Medium variance, most of the bigger wins will come in the free spins due to the trebling multiplier. It has a hit frequency rate of 31.37% as nearly a third of spins will result in a payout. The max win is 10,000 x stake per spin but it can reach 30,000 x your total stake per free spin.

Theme – Audio and Design Features – join the God of Thunder


The Thunderstruck slot machine has a Norse mythology theme and has a dark, cloud-filled sky in the backdrop. The inspiration is the God of Thunder and Son of Odin, Thor. The graphics and animations are quite basic (as it was released in 2003) but it kinds of adds to the charm and appeal.

Symbols include A, K, Q, J, 10 and 9 royals. You’ll also see the horn of plenty (Cornucopia), lightning bolts, castles, Thor’s hand and Thor’s hammer on the reels. The Thor’s hand and hammer symbols are the highest paying giving you 0.33, 2.77, 11.11 and 83.33 x your total stake for 2, 3, 4 or 5 across any payline. A screen full of either will result in a 750 x stake payout.

Thor himself is the wild symbol with 2, 3, 4 or 5 in combination giving you 1.11, 22.22, 222.22 and 1,111.11 times your stake. This means a screen full of Thor wilds will give you a 10,000 x stake payout. The wild also replaces all symbols bar the scatter.

Despite being released in 2003, Microgaming have revamped the game using HTML5 technology. This means you can play the Thunderstruck slot on desktop, mobile and tablet devices. The simple 5×3 reel layout works perfectly on smartphone devices too.

Thunderstruck Bonus Features

The Thunderstruck slot game has 2 bonus features. You can benefit from double wild wins as well as free spins where up to 30 free spins can be won with a 3x multiplier.

Double Wild feature

Look out for the Thor wild symbol. Any win involving the Thor wild will double your win. Known as the Double Wild feature, a 5 of a kind win for the Thor’s hand or hammer symbols will see you pocket 1,500 x your total stake.

Free Spins feature


Thunderstruck slot is all about the Free Spins feature. This is played if you get 3 more Ram scatter symbols anywhere on the reels. 2, 3, 4 or 5 scatters will give you 2, 5, 20 or 500 times your stake. 3 or more will reward you with 15 free spins.

Furthermore, all wins are trebled as they are subject to a 3x multiplier. You can also trigger an additional 15 free spins (with a 3x multiplier of course) if you obtain 3 Rams during the feature taking your total to 30 free spins with a 3x multiplier.

More importantly, a win involving the Thor wild symbol will give you a 6x multiplier effectively. However, a screen full of wilds symbols (10,000 x stake payout in the base game) will be trebled to give you a 30,000 x stake win.

Here’s a table that highlights what the max win is for each symbol in the base game, with the 3x multiplier in the free spins and the potential 6x multiplier in the free spins when involving a Thor wild symbol:

Symbol Base Game 3x Multiplier 6x Multiplier
Thor Wild 10,000 x stake 30,000 x stake NA
Thor’s Hammer/Hand 750 x stake 2,250 x stake 4,500 x stake
Castle 400 x stake 1,200 x stake 2,400 x stake
Lightning Bolt/Horn of Plenty 250 x stake 750 x stake 1,500 x stake
A/K 125 x stake 375 x stake 750 x stake
Q/J/10/9 100 x stake 300 x stake 600 x stake

Thunderstruck Review Summary – paved the way for future Norse mythology slots

The Thunderstruck slot is a simple game that is showing it’s age. It may look graphically dated but it’s become one of the most popular online slots of all time. The fact that the graphics are a little dated makes Thunderstruck more appealing to me than most newer slots.

This game is still in the top 10 most played slot games for many slot sites. As a result of its popularity, Microgaming created Thunderstruck 2 (it’s sequel) which is visually better and has more bonus features. Saying that, the max win in the original game is much bigger.

The key to winning big is from the Thor wild symbol. A screen full of them in the Free Spins feature will result in an almighty 30,000 times stake payout. It can still give you big wins of 4,500 x your stake for a screen of Thor’s hammer or hand symbols as well as a wild.

In conclusion, the Thunderstruck game is iconic and paved the way for future Norse mythology themed slots. If you want more Norse slots, the Age of the Gods slot by Playtech has 4 free spins features, is graphically very good and has 4 progressive jackpots.

Thunderstruck FAQs

What is the Thunderstruck RTP?

The Thunderstruck RTP is 96.1%. Average for a slot game, this medium variance title has a hit frequency of 31.37% so nearly a third of spins will result in a winning combination.

What is the Thunderstruck max win?

The most you can win per spin is 10,000 x your total stake. However, the 3x multiplier in the free spins can give you a 30,000 x stake win per free spin if you fill the reels with Thor wild symbols.

Are there any Thunderstruck free spins?

Yes. The Free Spins feature gives you up to 30 free spins with a 3x multiplier. If a win involves the Thor wild symbol, the multiplier doubles to 6x which can lead to huge payouts.

Is there a Thunderstruck demo version?

Yes. Play the Thunderstruck demo here at This allows to sample this iconic slot before playing for real money. You can play on desktop, mobile and tablet devices as desired.

Thunderstruck Slot Information

  • Game:
  • Provider:
  • Type:
    Video Slot
  • Reels:
  • Paylines:
  • Stakes Range:
    9p to £45
  • Bonus Features:
    Yes (2)
  • Free Spins/Multiplier:
  • RTP %:
  • Max Win:
    30,000 x
Review by Chris Taylor

Review by Chris Taylor

Chris is a slots expert that has reviewed and played over 4,000 online slots. Having being in the iGaming industry for over 16 years, he knows how slots work, how bonus features are triggered and how the RTP and variance affect the gameplay.