Thunderstruck I Slot Machine

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Thunderstruck I demo
Click to Play for Fun
Return to player Min bet size Game type Variance Reels Progressive Jackpot
96% 0.01 Video Slots Medium 5 No
Popularity Max bet size Game provider Bonus Features Paylines Theme
2 Microgaming Yes 9 Mythology

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Thunderstruck I online slot game

Thunderstruck does have an intriguing theme and story line, but is very basic in its features and graphics when compared with other online casino games. More seasoned gamblers may find it dated, but those who find flashy animation distracting might nonetheless be drawn to it.

Theme and Story Line

This casino game is based around the mythical Norse god Thor, who is known as the god of thunder, lightning, and storms. Accordingly, this slot has a storm theme, with even the traditional poker symbols containing visuals related to thunder and lightning.

Graphics, Sound, and Animation

As this game is centered around Thor, many of the symbols also relate to him such as his hammer and fist. Scatter rams, lightning and a castle make up a few of the other symbols. Unlike many other casino games, this slot does not have a great deal of animation or sound effects. Aside from the musical effects heard during a winning spin, the only other sounds players hear is the gentle humming of the reels spinning. 

Thunderstruck I 1

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To play, gamblers must first decide how many paylines to activate and the number of coins they would like to bet for each. It’s possible to change the number of coins at any time during play. To do so, simply click the plus or minus sign to add or subtract coins accordingly.

All wins pay from left to right, with the exception of the scatter symbol which will pay in any position. Thor doubles as a wild symbol, and will substitute for any other symbol aside from a ram. He is also a multiplier that triples the winnings whenever he appears.

When playing in expert mode, three additional buttons appear. These are 5x, which will spin the reels five times in a row; 10x, which spins them ten times; and auto play, which spins the reels continuously.

Bonuses and Free Spins

The rams act as a scatter symbol and will allow players to earn up to 15 free spins if three or more are activated. During these three spins any winnings are tripled, and there is also a chance to roll three more scatter rams for an additional 15 free spins. Ram scatters count if they appear anywhere on the board.

For bigger casino payouts, players may use the gamble feature, which is activated any time there is a winning spin. By clicking on the gamble button, gamers can try to guess the color or suit of a playing card. Guessing the right color will double the winnings, while choosing the correct suit will increase them by four times. An incorrect guess on the other hand will force gamblers to forfeit their winnings for that round.

Bet Sizes, RPT, and Variance

Gamblers can wager bets that range anywhere from .01 to .05 per payline for each spin. This makes it perfect for anyone who does not wish to bet lots of money at an online casino. However, it may put off those who are high rollers. Thunderstruck comes with a Return to Player of just over 96%, making it comparable to other video slot games. It is considered a medium variance game that offers moderate payouts at reasonable intervals.


Thunderstruck is one of the more basic slot games, and lacks the intense graphics and high-definition sound that is apparent in many other Microgaming casino options. The fact that it is one of the developer’s older slots could have something to do with that. Nevertheless, it continues to be popular in many of the most reputable online casinos because of its nearly seamless operation.

Many players enjoy the easy interface, and appreciate the fact that they do not feel pressured to make high wagers. As such, anyone who enjoys Norse mythology and is more interested in playing casino games for fun rather than scoring a large jackpot may find Thunderstruck very entertaining. Beginning gamblers as well as those wanting a more nostalgic game could be intrigued by it as well. 

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