Play Thunderstruck Slot Game

  • Thunderstruck
    Play for real

Thunderstruck is one of the oldest online video slots. It’s also one of the most popular, and that popularity has endured for close to 20 years at this point. Even today, in a world of 3D slot machines, vast progressive jackpots, and animated features, Thunderstruck still holds its own and is a very entertaining slot game.

Main Features

Game Type 5 reels, 3 rows, and 9 paylines
RTP 96.1%
Volatility Low
Themes Nordic Gods, Myths
Provider Microgaming
Max Bet $90
Min Bet $0.09
Release Year 2003

The Thunderstruck reels are set against an ominous sky backdrop, with rays of light peeking through dark rain clouds and threatening storms. The reels are filled with symbols taken right out of Nordic myth, including Thor, the thunder god himself, and Thor’s hammer, Mjollnir.

There are 9 paylines and all of these go from left to right.

Play for Fun

If you’re looking for a piece of iGaming history that never fails to disappoint, Thunderstruck could be just the ticket. With CA, you don’t even need to wager real money to experience it. All CA members can play in demo mode—there’s no risk, no wagers, and all the fun!

To make a start, just scroll to the top of this page.

Play for Real Money

When you’re ready to play Thunderstruck for real money, simply sign up, log in, and start playing. But before you do, you should check our latest promotions and offers. All new CA players are entitled to a Welcome Package, and the credits/spins from this bonus can be used to play slots like Thunderstruck.


You can win as much as 30,000x in the Thunderstruck Free Spin feature and this drops to 10,000x during the base game.


  • Coin Sizes: You can bet as little as $0.01 on all of Thunderstruck’s 9 paylines, creating a minimum bet of $9. This increases to $10 per line or $90 in total.
  • Symbols:
    • Main: Mjollnir, Staff, Castle, Lightning, Horn
    • Standard: Playing Card Symbols (9 to A)
    • Wild: Thor
    • Scatter: Two Rams Scatter
  • Additional Bonus Rounds:
    • Wild: Thor is the game’s wild and rewards the biggest win. All paylines in which Thor appears are also doubled and it’s possible to win with just two consecutive Wild symbols.
    • Free Spins: The Two Rams Scatter symbol triggers a bundle of 15 free spins. An instant payout is also awarded.
Symbol 2 on a Payline 3 on a Payline 4 on a Payline 5 on a Payline
Rams Scatter 2x 5x 20x 50x
Wild 1.1x 22x 220x 1111x
Mjollnir 0.3x 3x 11x 85x
Staff 0.2x 3x 11x 85x
Castle - 1.8x 11x 45x
Lightning - 1.1x 8x 25x
Horn - 1.1x 5.5x 25x
A - 1.1x 5.5x 12x
K - 0.5x 5.5x 12x
Q - 1.1x 2.75x 11x
J - 1.1x 2.75x 11x
10 - 1.1x 2.75x 11x
9 0.2x 1.1x 2.75x 11x

In Norse mythology, Thor’s chariot is pulled by two rams: Tanngrisnir and Tanngnjostr. The legends say that Thor killed and ate the rams to gain sustenance from their flesh, before using his hammer to resurrect them.

The two goats and the hammer play an important role in the Thunderstruck slot. The goats act as the game’s Scatter symbol, triggering an instant win when 2 to 5 are revealed and 15 free spins with 3 to 5. As for the hammer, it rewards some of the biggest payouts and is second only to the Wild.

During the free spins, all wins are tripled, making the wild and the Mjollnir Hammer even more powerful. The spins will also trigger again if three or more scatters appear on the reels when it is active.

Software and Mobile Experience

Thunderstruck hit the market four years before the first iPhone was released. The developers couldn’t have known how popular mobile gaming would have become, or even if it would be a thing, and so the early iterations of Thunderstruck weren’t mobile-ready.

A lot has changed since then, though, and the Thunderstruck slot game now looks great on mobile. It’s fast, smooth, and simple. And the fact that it’s an old-school slot that’s not weighed down by big graphics and features means that you can enjoy it even on older devices.


What is the RTP of Thunderstruck?

Thunderstruck has an RTP of 96.1%.

What is the Jackpot in Thunderstruck?

In the Free Spins feature, it’s possible to win as much as 30,000x per spin as all wins are tripled.

What is the Biggest Possible Win in Thunderstruck?

The Thor Wild symbol triggers some of the biggest payouts in the base game and will turn a $0.90 stake into a $1,000 payout. You can see a full list of payouts in the game’s paytable. All of the amounts shown within are fixed according to your current stake.

Can I Play Thunderstruck on Mobile?

Thunderstruck was created before mobile casinos were a thing, but it has been adapted over the years and can now be played on mobile devices.


Thunderstruck was so popular that it inspired a sequel. Thunderstruck II was bigger, bolder, and brasher. It took everything that made Thunderstruck a popular slot game and dragged it into a new age. But despite that evolution, the original Thunderstruck is still one of the best slot games out there right now and you can play it right here at CA.