Hot Gems Extreme Slot: Review, Casinos List

Hot Gems Extreme Online Slot Logo


Released Oct. 31, 2020
Software provider Playtech
RTP (return to player) 95.81 %
House edge 4.19 %
Volatility high
Theme Dwarfs, Jewels and Gems
Reels 6
Paylines 262144
Bonus game No
Free spins Yes
Wild symbol Yes
Scatter symbol Yes
Multiplier No
Progressive No
Top win x10,000
Bet Size 0.20-240 EUR

Best online casinos with Hot Gems Extreme slot


Rating: 9.93

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Theme and basic information

The Hot Gems Extreme slot’s theme relates to mining and can be considered highly entertaining thanks to expanding rows and some cool features like TNT, walking mystery, bonus or free spins and Wild. All these features are thoroughly-designed and certainly can be enjoyed by all types of players. The game also has up to 262,144 ways to win which actually means that you are able to get a really big sum of money as a reward that equals to x10,000 your bet. Further in the article, I’m going to elaborate on all the slot’s details.

The main character of the game is an old miner who is wearing a hat on his head and has a long grey beard and a big smile. The other symbols demonstrate different attributes of the mining process and, perhaps, belong to the old miner.

The plot of the game tells us, as you could have predicted, the story about a miner who makes his job properly and gets diamonds of different color and size from the ground.

The Hot Gems Extreme slot game was released by Playtech provider, that is well-known in the gambling industry, in late October 2020. Though, the first version of this particular game was released in 2012. And over time, it has been equipped with all necessary innovative technologies.

Game play

The slot starts off with 6 reels and 4 rows as an unordinary-looking board with symbols that are inside of the rock and filled with precious stones.

As for the number of paylines, Hot Gems Extreme begins with the standard grid and 4096 ways to win, and during the game, you can reach up to about 262,000 pay-ways (called megaways feature). It sounds fairly amazing, doesn’t it? So, the more reels are on the board, the more winning lines are active and, also, the bigger the maximum potential win.

The winning way pays if 3 or more symbols anywhere on the adjacent reels appear on one row, and a combination begins from the far left position.

Speaking about the betting mechanics, you can set just the total bet which can range from 0.20 euros to 240 euros. So, it can be a good choice for high-rollers.

Slot Symbols

There are 12 paying symbols and two special ones which are Wild and Bonus (it is actually a Scatter symbol).

The highest paying symbol is one with the old miner. It pays up to 75x a total bet if all 6 symbols lay on a pay-line and 4x a bet if you can see only two similar symbols.

Among the lowest paying symbols of the slot are diamonds of pink, purple, yellow, red and orange color. They pay up to 5x a total bet if all 6 symbols appear on the adjacent reels of one row.

As a result, the highest win per line equals 18,000 euros, in the case your bet is 240 euros (75x 240). Nonetheless, don’t forget that the maximum possible win is significantly higher, and it is 10,000x your bet that can be set to 240 euros.

Wild symbol looks like a diamond of bluish color. It substitutes for all symbols except Scatter, TNT and Walking mystery symbols.

Bonus (serves as Scatter in this slot) has a picture of the closed-up mine on its symbol and triggers the Free games. The Free games start off if 3 or more Scatters land on the reels.

Slot bonus features

As I’ve mentioned, 3 or more Bonus symbols trigger Free games. To be more precise:

  • 3 Scatters bring 10 Free games

  • 4 Scatters bring 12 Free games

  • 5 Scatters bring 18 Free games

  • 6 or more Scatteres bring 25 Free games

While you play Free games, every win or TNT explosion makes the grid grow up. So, every new (grown) row is called Safety level. And such a Safety level is active from the next spin till the end of the Free games session. The safety level offers additional winning ways. So, as you could have guessed, the more safety levels, the more winning ways.

Keep in your mind that 3 or more Scatters anywhere on the reels during Free games retrigger 3 or more Free games.

The Bonus game is not offered in the slot. Instead of it, you can enjoy some cool special features that I’m going to consider right now.

Special features

Among the special features of this slot game you will see the following:

  • Growing reels

  • TNT

  • Big symbols

  • Walking mystery

All the features are engaging and well-implemented.

So, let’s start with the Growing reels feature. The number of rows increases by one more row after every explosion. This number can rise up to 262,144 ways. The feature (it is called Ways boost) continues till there won’t be new explosions anymore.

TNT feature changes to Wild and explodes all the adjacent symbols around it. It can’t explode big symbols, Bonus, Wild and Walking mystery symbols.

As for the big symbols feature, it means that 2x2 and 3x3 symbols drop down on the reels, crush and remove all smaller symbols on their way except for Wild, Scatter, TNT or Walking mystery symbol.

Walking mystery is a symbol that moves and stops randomly while marking positions with a fire-like picture. All Walking mystery symbols will then turn into a random symbol from reel 1. This symbol that starts or ends on reel 1 will change to any random symbol except Wild, TNT and Bonus. It cannot mark positions with TNT and Scatter symbols.

Hot Gems Extreme doesn’t offer neither free spins’ multiplier nor a progressive jackpot.

RTP and variation

Return to player (RTP) of Hot Gems Extreme is 95.81% which is a little bit lower than the average range of coefficients in the market (96-97%). It means that it is definitely not the most attractive slot that you have ever met, but it is not the worst one, as well.

It is a high volatility game, as a result, big wins will emerge not so often. Though, even if you can win 10,000 euros quite rarely, the lower wins will appear significantly more likely.

The hit frequency of this slot is not disclosed by the provider.

Graphics and sound

The graphics of the slot has a good quality, it is bright and modern-looking. All details of the slot are well-considered and have their role in the general plot.

I liked the country music that is used in the slot. It is certainly not annoying and even can add positive emotions to the gameplay experience.

There is no intro in the slot.


Let’s consider the pros and cons of the Hot Gems Extreme slot.

The pros of this slot are the following:

  • nice animation

  • high-quality sound

  • huge possible winning

  • html5 is supported

The cons of the slot are as the following:

  • low RTP level

  • quite an ordinary theme

  • high volatility

  • no free spins multiplier

Summing up, Hot Gems Extreme is a slot that looks innovative and fresh, it is bright and offers lots of engaging features. Moreover, the maximum possible win is huge which makes it a great choice for those of players who love fun and risk.

Unfortunately, those players who prefer safe gameplay experience with high RTP and low volatility won’t be impressed at all. It is a high-risk game that, probably, satisfies just some types of players.

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