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Reign of the Mountain King slot

Reign of the Mountain King
Reign of the Mountain King
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Updated: 22.07.2025
Reviewed by: Ella Houghton

The Hall of the Mountain King was written in 1875 and has been used with success in several slot machines, including the original Rise of the Mountain King. Reign Of The Mountain King, released on 24/11/2021 - very similar to it, although significantly diluted. Today we will take a close look at what this slot consists of: its design, bonus features, paytable, and a mathematical model so stay with us.

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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 Reign of the Mountain King slot

General information about Reign of the Mountain King slot

Rating by Ella Houghton:
8.9
Light & Wonder
Write a review +25 SJ points
  • Release Date:
    24.11.2021
  • Volatility:
    High
  • RTP:
    96.0%
  • Multiplier:
    Yes
  • Max. win:
    25,000x
  • Bonus game:
    No
  • Free spins:
    No
  • Scatter Symbol:
    No
  • Wild symbol:
    Yes
  • Symbol Stacked:
    Yes
  • Jackpot Game:
    No
  • Slot lines:
    10
  • Slot reels:
    5
  • Layout:
    5-3
  • Stakes range (€/£/$):
    0.1 to 10
  • Slot Theme:
    Fantasy, castle
  • Technology:
    HTML5
More infoLess info

Licensed and tested by

  • Gambling Comission

How to play

The playing field has received a standard structure of 5 reels in 3 rows. Here you get 10 lines to land the winning combinations. The original bonus round has been replaced by Re-spins with upgradable Multiplier Wilds, and the only great change is the ability to unleash the slot's great potential with Wild Wins up to 512x during the base game. The game can be launched on any device, be it a PC, mobile phone, or tablet.

To become a guest in the mountain king kingdom you need:

  • Open the game here for demo or in casino to play for real
  • Check out the paytable and rules
  • Choose the stake size: from €0.10 to €10
  • Spin the reels!

Reign of the Mountain King RTP and Volatility

8 

High risk comes with a 96% return.

Today we will introduce you to the classic good mathematical model for high-risk/reward players using the example of Reign of the Mountain King. It has high volatility which offers big prizes and an RTP (Return to Player) of 96% which is the market average. Well done, SG Digital!

Theme

9.4 

Upon loading the game, we were immediately taken inside a rich-looking castle with high ceilings and large columns. It is slightly lit by fire which is in golden vases and we see a red carpet in front of us that leads directly to the throne of Mountain King. The king is depicted as a slightly insane-looking man with a large golden crown on his head and a thick black beard. He appears on the playing field as a symbol and you can also see the white-haired queen, monsters, weapons, and suits of playing cards on the reels.

Theme

Reign of the Mountain King slot paytable

Mobile compatibility

Mobile compatibility

Reign of the Mountain King looks and sounds as good on mobile phones as it does on PCs, thanks to the fact that SG Digital created it using HTML5! You can play this game on any modern device, be it a mobile phone, tablet or computer. Enjoy the opportunity to be anywhere during the session but remember that you will need a good Wi-Fi connection and a flash player for this.

About SG Digital

SG Digital is a successful provider that operates as a division of Scientific Games Corporation, one of the world's leading gambling companies. The company appeared a long time ago in Las Vegas, where their main office is today. With over 1,400 talented employees, they are here to empower their clients to take new paths and reach their full potential! They specialize in online casino games and sports betting. Their most popular slots include 100 Xra, Savannah Drums, Wins of Nautilus, and Pirate Pays Megaways.

Bonus Rounds & Free Spins

8.5 

Re-Spins

You get re-spins when 3 Wilds hit reels 2, 3, and 4, and each Wild starts with a 1x multiplier. Wilds become Sticky after the end of the re-spin, and if new Wilds fall on reels 1-5, they become sticky too!

Reign of the Mountain King slot machine

Gem symbols can appear on top of standard symbols, and they are collected in a special meter above the playing field. Every 3 gems received triggers a new multiplier: 2x to 3x, 5x, and 8x. The multiplier earned is attached to all Sticky Wilds on the middle 3 reels. Multiple Wilds that are part of 1 winning combination multiply the corresponding multiplier values. The bonus is closed when neither gems nor Wilds land during the re-trigger, nor if you get the max win.

Reign of the Mountain King slot machine

Reign of the Mountain King Demo play

This is a highly volatile game and if you don’t feel ready to play for real money then we advise you to try it in demo mode first. By the way, the demo mode is already on this page! Just click "Play Demo" and start testing this game without spending a cent. In this mode, you can familiarize yourself with the gameplay by making bets with fun coins.

Max Win

9.5 

Dare to enter the mountain king's castle to win up to 25,000x!

25,000x is the maximum that you can win here. This is decent potential for a high volatility slot, but it is only 1/5 of the potential of the original slot. To get such a win, you need to get the re-spins feature with progressive multiplier and Sticky Wilds or earn a large multiplier in the base game.

Overall Rating

8.9

We don't know what NextGen (SG Digital's partner) wanted to do with this sequel as it has been toned down in every possible way compared to the somewhat successful original. The audiovisual performance of both slots is top-notch, but the sequel's RTP has dropped markedly and its potential is just a small chunk of the original's maximum payoff. But if we do not compare this slot with the original, then we can safely say that it is great for high-risk/reward players who like the re-spin feature.

Hits
Multiplier up to 512x
Re-spins with Sticky Wilds and multipliers
Collect gems to earn an 8x Wild multiplier
Misses
A weak sequel to Rise of the Mountain King
High volatility

FAQ

What is the most important symbol in Reign of the Mountain King?

The shit symbol is Wild as by landing 3 Wilds on reels 2, 3, and 4 you will get the Re-Spins feature with nice multipliers and Sticky Wilds!

Can I play Reign of the Mountain King for free?

Yes, the demo mode of this game is already on this page! Just hit the "Play Demo" button and enjoy your free session!

What is the Return to Player (RTP) in Reign of the Mountain King?

The RTP of this highly volatile slot is 96%, which is the industry average.

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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.

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