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12 Bolts of Thunder

Review, Demo Play, Payout, Free Spins & Bonuses

12 Bolts of Thunder is an online slot developed by Thunderkick. With a 5x4 layout, 20 paylines and an RTP of 96.15%, it is a highly volatile slot. The maximum win multi...plier is 30,000x the bet, and it features hammer wins, a scatter symbol and free spins.

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  • Hammer wins
  • Free spins
  • 30,000x top win
  • High volatility is not for everyone

12 Bolts of Thunder Slot Review

Welcome to the thunderous realm of 12 Bolts of Thunder, where the ancient Norse gods have decided to spice up the slot reels with lightning and hammers. Developed by Thunderkick, this slot takes inspiration from the mighty Scandinavian deities, and the star of the show is none other than Thor's Hammer itself.

12 Bolts of Thunder Slots Theme, Graphics & Soundtrack 


The theme of the 12 Bolts of Thunder slot revolves around Norse mythology, featuring iconic symbols from the ancient Scandinavian pantheon. The central focus is on Thor's Hammer, a symbol of power and lightning.


The graphics in 12 Bolts of Thunder are vibrant, bringing Norse mythology to life on the reels. Thor's Hammer, along with W wings on shields, Triple Sevens and other thematic symbols, pop with colour and detail. The game's symbols are well designed, blending seamlessly into the overall theme. The incorporation of classic slot symbols, such as the BAR logo and horseshoes, with Norse elements adds an interesting twist.


The soundtrack complements the Norse theme, featuring epic tunes that enhance the overall atmosphere. The music works well during critical moments, such as the Hammer Win feature and free spins. The game incorporates engaging sound effects that resonate with the theme. From the electrifying sounds of Thor's Hammer to the triumphant jingles of winning combinations, the audio elements add to the overall enjoyment.

12 Bolts of Thunder

12 Bolts of Thunder RTP & Volatility

In this part of the 12 Bolts of Thunder slot review, there's a look at the volatility, top prize and RTP.


The slots game's RTP is 96.15%.


The 12 Bolts of Thunder slots game's volatility is high.

Payout Potential

The maximum win multiplier in 12 Bolts of Thunder is 30,000x the bet.

How to Play 12 Bolts of Thunder

It’s easy to get started with the 12 Bolts of Thunder slot. Follow these instructions:

  1. Select your desired bet amount by clicking on the bet display.
  2. Click on the information icon the read the rules of the game and view the paytable. The three horizontal lines open the settings menus.
  3. When you’re happy with your bet, simply click the spin button to set the reels in motion.
  4. Always gamble responsibly. Most responsible casinos have deposit limits you can set and tools such as timeout and self-exclusion that you should use if you’re concerned about your gambling.

How to Win at 12 Bolts of Thunder

12 Bolts of Thunder operates on a 5x4 reel configuration with a total of 20 paylines. Paylines are fixed, and to secure a win, players need to land matching symbols on one or more of these paylines. Winning combinations are formed by landing identical symbols on adjacent reels, starting from the leftmost reel.

Highest-Paying Winning Symbols

The highest-paying symbol is the triple sevens. Other high-paying winning symbols are:

  • Bar
  • Bell
  • Horseshoe


The wild symbol, represented by a W-shaped pair of wings on a shield, substitutes for all symbols except the bonus and hammer symbols.

12 Bolts of Thunder
Max-win 30,000x
12 Bolts of Thunder
Volatility Medium
12 Bolts of Thunder
Top RTP 96.15%

12 Bolts of Thunder Bonus Features

12 Bolts of Thunder offers an electrifying gaming experience with several bonus features that can enhance the excitement and potential payouts for players. 

Hammer Win Feature

When four to 12 Hammer symbols strike the middle reels in the base game, players are in for a payout spectacle. The more Hammers in view, the greater the reward, ranging from 2x for four Hammers to an awe-inspiring 1,000x the stake for a full complement of 12 Hammers.

Free Spins Bonus

The free spins bonus is triggered by landing three, four or five scatter symbols in the base game, awarding six, nine or twelve free spins respectively. 

Hammer Win Upgrades

What makes the free spins bonus particularly thrilling is its connection to the Hammer Win feature. Each time a Hammer Win occurs during free spins, the Hammer prize ladder increases a level, along with the associated prizes. Achieving 12 Hammers at the top level awards a colossal 30,000 times the bet.

Additional Free Spins

Each Hammer Win during free spins adds an extra layer of excitement by awarding an additional three free spins. 

12 Bolts of Thunder Review Summary

12 Bolts of Thunder slot is a visually captivating Norse mythology-themed video slot. While the initial impression may seem somewhat plain, the vibrant symbols, especially Thor's Hammer, and the thematic backdrop contribute to an immersive gaming experience. 

Gameplay and Features

The gameplay in the 12 Bolts of Thunder slot is dynamic, featuring a range of bonus features that elevate the excitement. The Hammer Win feature and free spins bonus, coupled with the potential for significant upgrades, provide players with ample opportunities for thrilling moments and substantial payouts. 

Symbol Design and Payouts

The game's symbols, a blend of Norse mythology and classic slot icons, offer a visually pleasing mix. Thor's Hammer stands out, and the Hammer Win feature provides a clear path to substantial rewards. The inclusion of a wild symbol enhances the potential for creating winning combinations.

Audio and Atmosphere

The soundtrack in 12 Bolts of Thunder matches the Norse theme effectively, adding an epic dimension to the gameplay. Engaging sound effects further enhance the overall atmosphere.

Disclaimer: 12 Bolts of Thunder trademark / license is owned by Thunderkick. This site is not endorsed by Thunderkick.

Slot Data
Slot Name: 12 Bolts of Thunder
Software: Thunderkick
RTP: 96.15%
Volatility: Medium volatility
Paylines: 20
Reels: 5
Min Bet (all lines covered): £0.10 (GBP)
Max Bet: £100 (GBP)
Top Win: 30000
Features: Bonus Game, Wild Symbol, Scatter Symbol, Free Spins, Expanding Wilds, Respins, Medium volatility, 5 Reels, Symbol Collection, Prize Wheel
UK Available in UK? Yes. Thunderkick have a UKGC license and are allowed to offer their games at UK licensed casinos.


Is there a progressive jackpot in the 12 Bolts of Thunder slot?

No, the 12 Bolts of Thunder video slot does not feature a progressive jackpot. However, the game offers an impressive top total win multiplier that can lead to substantial payouts. The maximum win potential in the game is an astounding 30,000 times the stake. To win the top prize, players need to trigger the Hammer Win feature during the free spins bonus round and progress through the Hammer Paytable upgrades.

The 12 Bolts of Thunder slot has a big top win multiplier of30,000x the bet. Can you recommend other <a href="">online slots</a> with large top wins?

If you want to play slots with a big payout potential, you could try Dead Canary by NoLimit City, which has a maximum total win of 65,000x the stake. It has an RTP of 96.02%, 36 paylines, is highly volatile and features wilds, a scatter symbol, free spins, respins and a hold and spin bonus round.

How can I spot the pattern that tells me when the 12 Bolts of Thunder slot is ready to pay out a big win?

It's important to note that slots, including 12 Bolts of Thunder, operate on random number generators. As a result, there isn't a predictable pattern that signals when the game is ready to pay out a big win. Each spin is a chance event, and the outcomes are not influenced by prior spins.

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