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King of Thunder Slot - Review, Free & Demo Play

King of Thunder
King of Thunder
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Updated: 22.09.2025
Reviewed by: Ella Houghton

King of Thunder, released on 16/12/2022 is a catchy online slot about Greek mythology from Fazi Interactive. The game will impress you with its fantastic visuals and entertaining gameplay, where you can trigger free spins and hit the jackpot. We offer you to read a review of King of Thunder to learn its mechanics, RTP, and other vital details.

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In this review
  1. Slot details
  2. Theme
  3. Bonus Rounds & Free Spins
  4. Summary
  5. Where to play
General information about King of Thunder slot

General information about King of Thunder slot

Rating by Ella Houghton:
8.1
Fazi Interactive
Write a review +25 SJ points
  • Release Date:
    16.12.2022
  • Volatility:
    Medium
  • RTP:
    96.2%
  • Multiplier:
    Yes
  • Max. win:
    1,656x
  • Bonus game:
    No
  • Free spins:
    Yes
  • Scatter Symbol:
    Yes
  • Wild symbol:
    Yes
  • Symbol Stacked:
    Yes
  • Jackpot Game:
    No
  • Slot lines:
    10
  • Slot reels:
    5
  • Layout:
    5-3
  • Stakes range (€/£/$):
    0.1 to 40
  • Slot Theme:
    Ancient Greece
  • Technology:
    HTML5
More infoLess info

Licensed and tested by

  • HGC (Hellenic Gaming Comission)
  • MGA
  • ONJN

How to Play

Here are the main steps to start playing King of Thunder:

  1. Visit an online casino and find the title in the catalog
  2. Launch the slot
  3. Press “+” and or “-“ in the bet section to set the bet amount. The stake range is €0.1-40
  4. Check rules and paytable
  5. Make any needed adjustments in the game settings
  6. Spin the slot manually by pressing the play button/spacebar or start automatic play.

King of Thunder is a 5x3 online slot with 10 fixed betways. The game pays in a classical left-to-right way on adjacent cells. All winning combinations in the slot must start from the leftmost column.

The slot has 3 main gameplay features – Risk Game, free spins, and jackpots.

King of Thunder RTP and Volatility

8 
The slot has medium volatility and an RTP of 96.21%.
King of Thunder has a medium-high variance. The slot has a relatively low hit frequency and can have cold swings. You can see that there is an obvious separation between the odds of low-pay and high-pay symbols. But there are basically only two high-pay symbols in the game. The slot's RTP is 96.21%, which is slightly above average for modern online slots.

Theme

9 

Feel the majestic atmosphere of the legendary Olympus Mount, the place where Greek Gods do their business. You will see a fabulous garden and some beautiful buildings with classic pillars. The slot has impressive graphics with an animated board and symbols. And on top of that, there are great visual effects during free spins. Of course, you will also hear an excellent pleasing soundtrack.

King of Thunder has 11 symbols, with 9 of them being regulars and 2 special elements.

Check all regular-pay elements with their respective odds below:

  • 10, J, Q: 1x, 2x, 7.5x
  • K, A: 1.5x, 3x, 10x
  • Harp, wreath, vase: 3x, 6x, 25x
  • Pegasus: 6x, 15x, 60x
  • Goddess: 15x, 30x, 100x

Two special symbols are Wild (Zeus) and Scatter (Free Spins), both payable. Wilds replace regulars on the board and pay, while Scatters pay anywhere and award free spins.

Theme
King of Thunder Slot - Paytable

Mobile Compatibility

King of Thunder Slot Mobile
You can smoothly run Kind of Thunder on your phone or tablet. The game is compatible with mobile devices on Android and iOS, thanks to HTML5 technology. The slot’s mobile version provides gamblers with an adaptive UI that supports all visuals, sounds, and functions. You can easily control the gaming process and navigate through the layout via a touchscreen.

About Fazi Interactive

Fazi Interactive is a leading Serbian provider of gaming equipment and casino software that was founded in 1991. The company works in both retail and iGaming niches, producing physical machines and online games. Recently, Fazi Interactive started focusing on developing games and solutions for online casinos. The company’s portfolio contains more than 100 slots, including classic titles and innovative games. Golden Crown, Very Hot 40, and Jolly Joker are some of the provider’s best releases. Fazi Interactive has access to more than 20 local markets. Aside from developing land-based and online slots, the company offers various B2B and B2C solutions.

Bonus Rounds & Free Spins

8.5 

All main gameplay features of King of Thunder are described below.

Free Spins

Catch no less than 3 Scatter symbols to trigger free spins. You will get shifting wild reels during this round:

  • The first two free spins have stacked wilds on the 1st and 5th reel
  • In the second 2 spins, stacked wilds shifts to 2nd and 4th reel
  • In the last 2 spins, stacked wild with an 2x multiplier will be on the 2nd reel.

Gamble Feature

You can press “X2” after a winning spin to enter the Risk Game. In this round, you must pick the red or black color. If the pick is correct, your winnings will be doubled; in the opposite case, you’ll lose all your winnings. The Gamble win limit is 2,000.0.King of Thunder Slot - Gamble

Jackpot

Mystery jackpot awards are displayed above the reels. Jackpots have a fixed part and an increment (progressive amount).

At the beginning of any base spin, a certain percentage of the bet will be accumulated in the pot. The chance of winning a progressive jackpot increases with the bet amount. The slot awards jackpots randomly to one of the players.

King of Thunder Demo Play

On this page, you can play the demo version of King of Thunder. It’s a great opportunity to learn the slot’s gameplay, mechanics, and patterns. It’s a great preparation for the money game. Of course, you cannot win real funds from a demo play, as you will be betting with a virtual deposit. And if you want to play King of Thunder for real money, consider creating an account in one of the recommended online casinos.

Max Win

7 
The maximum win of King of Thunder is 1,656x.
The maximum multiplier of King of Thunder is capped at 1,656x. At least you can see such information on the slot’s welcome screen. Free spins are more suitable for big wins than a base game due to wild reels and additional multipliers. And most big hits in the slot include Wild symbols.

Overall Rating

8.1
On this page, you can play the demo version of King of Thunder. It’s a great opportunity to learn the slot’s gameplay, mechanics, and patterns. It’s a great preparation for the money game. Of course, you cannot win real funds from a demo play, as you will be betting with a virtual deposit. And if you want to play King of Thunder for real money, consider creating an account in one of the recommended online casinos.
Hits
Progressive jackpots
Free spins with moving wild reels
Gamble feature
Misses
No Buy Feature
Ella Houghton
Ella Houghton
Expert in: News, Blog, Slot reviews, Payments
Ella is a professional content-writer with 8 years of experience in the casino sphere. She has broad knowledge of gambling related themes and is happy to share this with Slotsjudge.

2128 articles

Reviewed by Editor-in-Chief
Nikita Lukanenoks

King of Thunder Slot - FAQ

How to win the jackpot in King of Thunder?

Just spin the slot for real money. The game randomly awards jackpots.

Can I retrigger free spins in King of Thunder?

You can retrigger free spins by landing 3+ Scatter symbols.

How to change the number of paylines in King of Thunder?

The slot has 10 fixed betways, and you can’t change them.

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