12 Bolts of Thunder Slot (Thunderkick)

This 100 Spin test was updated by Steve Madgwick on 1/2/2024

In this video, I play and review a brand new slot game from Thunderkick, 12 Bolts of Thunder. I do 100 spins with and count the number of wins, check the RTP, volatility, and hit rate. We also hit the free spins bonus round and analyze the session's profitability. Don't forget to scroll down for the full review and game data and slot sites to play at. Enjoy!

The Spin Test criteria can be found at the bottom of the page

Test Comments

Despite not being a fan of this type of game and one to approach Thunderkick games with an air of caution, 12 Bolts of Thunder delivered in spades, with the bonus round hitting at just spin 13 of the test - The bonus was pretty impressive paying a 155.5x round which set me up nicely to complete the test with a huge 265% Session RTP - The hit frequency was still pretty good given the big bonus with 15x and 20x base game wins dropping in, thanks to the hammers landing, with 24 wins in all from the 100 spins. 

Steve Madgwick

Editor-In-Chief

Steve is a confessed online slots fan and keeps his hand in the slot section of OLBG by undertaking all of our 100 spin tests, collecting the data and updating this section with the results

Thor is one of the most well-known characters in Norse mythology; he is the God of lightning, thunder and storms. He is instantly recognisable by his thundering hammer, which is the basis of this brand-new slot game. It's all about the hammers here - when you play, you'll see that these make up the bulk of the features.

In addition to the Hammer symbol mentioned in the summary, you'll be able to play a fun Free Spins round. Here, there are 6-12 free spins and 'Hammer wins,' which take place during the bonus game. These Hammer wins upgrade each multiplier level on the Hammer Paytable. There are up to 5 upgrades available, and the top multiplier at the highest level is a whopping 30,000x the stake.

During this detailed 12 Bolts of Thunder slot review, you’ll be able to read about all aspects of this brand-new release, so let’s power on!

Graphics, Music, and Sound Effects

I've now covered the summary, intro, graphics, music, and sound effects. Next on the list, I’m going to explore the key game features of 12 Bolts of Thunder.

At OLBG we create slot games reviews that include up-to-date info about essential features such as the theme, paylines and reels, bet range, and bonuses. I’ll finish off the review by talking about my play experience, first impressions and expert verdict.

Theme – Mythology

The game is based on Thor's magical hammer, which is called Mjölnir in case you're interested. Thor himself doesn't make an appearance in this game; however, it's set in some otherworldly realm - perhaps Asgard, where the gods in Norse mythology resided. As befitting of a game set in a place where Gods are supposed to hang out, the colours are based on the blues of the sky, and you'll see plenty of fluffy white clouds. 

When switching to the altogether different realm... of the Bonus Game, the colours switch to pink, purple and orange hues, which gives a glow to the screen. The grid is eye-catching with dazzling colours, and the Hammer Paytable matches this design, so you can't miss it. On the grid, in order of value from the highest, you'll see number 7s, the word BAR, a bell and a lucky horseshoe. These are then followed by the standard symbols of, A, K, Q and J.

Reels

The 12 Bolts of Thunder slot game is made up of 5 reels and 4 rows to play with. 

Paylines

There are 20 non-adjustable paylines where you can trigger wins.

RTP

Return to Player is most commonly referred to as RTP which you may have seen on slot sites. This is a way of measuring theoretically what percentage of players' stakes will be returned to them over the long term so it's an important measure. The higher the number the better for players, RTP should be around 96% or more. 12 Bolts of Thunder is slightly over the average at 96.15%.

Thunderkick use this RTP figure as a default value so if you shop around you’ll discover different rates. To save you some time, we’ve identified a few at some of the current popular UK online casinos and added them to our table below.

By the way, RTP is just one factor when deciding which site to play at. You should also think about payment options, game library, customer support and welcome bonuses and deals. Our casino reviews look at this info and much, much more.

Stake Range

There’s a wide bet range for the 12 Bolts of Thunder slot game which starts at 10p and goes right up to £5.

Max Win

The max win for the 12 Bolts of Thunder game is an impressive 30,000 x your stake.

Wild Shape

The Wild symbol substitutes for all other paying symbols apart from the Bonus and Hammer symbols.

Free Spins

3 or more Bonus symbols trigger the Bonus Game, which features free spins. The number of free spins you receive depends on the number of Bonus Symbols landed. Hammer Wins during the bonus game will upgrade each multiplier level on the Hammer Paytable after payouts. The maximum of upgrades available is 5. The highest multiplier is 30,000x for 12 Hammer symbols at the highest level.

Jackpot

Like most slot games nowadays, the 12 Bolts of Thunder slot game doesn't have a jackpot element. If jackpots are your thing you should visit our page with the best jackpot slot games.

Play Experience & First Impressions

When launching the game for the first time it was aesthetically pleasing, but does it have the features to back it up? The gameplay is straightforward; the Hammer Paytable is key, so during the base game, you're hoping to see 4 or more Hammer symbols. A multiplier prize table is a tried-and-tested slot mechanic; you'll be familiar with it if you've played slots for a while.  The Hammer Win during the Bonus Game made things a bit more dramatic and exciting due to the sheer amount of hammers popping up on the screen. However, the features felt a bit flat to me, it was a bit too simple.

I had high hopes when launching the game for the first time, as it looked slick but it soon became apparent that the features were not particularly engaging. The storytelling side was weaker than it normally is for a Thunderkick game, too. It's almost like having 2 slices of bread and a slice of cheese there, but there's something extra needed to make it tastier - perhaps onion would work for this sandwich metaphor. A character to front the game would have been good too - characters seem to create a stronger theme in the slots world.  Seeing Thor wield his massive hammer on the grid might have worked well on the screen. Thunderkick's last release was Hellapenos which definitely had more meat on the bones (wow, the food references are rolling off my tongue today).

However, one huge silver lining is the max win amount of 30,000x your stake; this is Thunderkick's second largest amount to date, so that is worth shouting from the rooftops. 12 Bolts of Thunder is an uncomplicated game with a high volatility rating and a huge max win. If this is what you are searching for, you've come to the right place. If you are looking for something with a bit more pzazz this might not be the right title for you.

The 12 Bolts of Thunder slot review was written by our slot game experts on the OLBG Expert team. Beginning with Jenny Mason our prime Slot reviewer who has 17+ years in online gambling, top UK brands. Expert in sports betting, slots, and bingo. Then Andrej Trajkovski, who has worked in the online gambling industry since 2013, playing and reviewing online slots and casinos daily for the past four years. 

The review is Fact Checked by William Westerlund, an online casino expert reviewing casinos and slots for over five years.  Steve Madgwick is our Editor-In-Chief with over 18 years of experience creating and managing high-quality sports betting and Casino content for OLBG, a self-confessed online slots fans who has played at 100's of the best slot sites online and completes the 100 Spin tests to keep his hand in.

Jenny Mason

Queen of Bingo

Jenny Mason is OLBG’s Senior Marketing Manager with over 17 years of experience in the online gambling industry. Having worked with major brands like Gala Bingo and Ladbrokes Coral, she combines deep marketing expertise with a passion for Bingo and Online Slots. 

Since joining OLBG in 2014, Jenny has led successful campaigns while also creating hundreds of engaging slot reviews and articles. Her unique blend of strategic marketing and content creation continues to shape OLBG’s slots and casino offering.

100 Spin Test Criteria

The 100 Spins test is undertaken on a demo slot, staking 100 spins at £1 per spin

Session RTP - Return to the player after 100 spins - Eg, A return of £45 from 100 spins is 45%, or a return of £107 is 107%

Win Frequency - A winning spins to spins frequency, higher frequency regardless of prize, is often more entertaining.

• 0-10 Very Low
• 11-15 Low
• 16-30 Medium
• 21-35 High
• 36+ Very High

Biggest Base Game Win  - Highest single base game spin winning value

Spins to Bonus - How many spins were completed before the main bonus round was achieved

Bonus Paid - Value of bonus once complete

Time Taken  - How long did the 100 spins take to complete? OLBG Expert team