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Mining Fever

RTP 96.13%
Play Microgaming Slots
Reels 5
Paylines 243
Min bet size 0.2
Max bet size 40
RTP 96.13
Wild symbols Yes
Free spins Yes
Bonus No
Jackpot No

Top Casinos: United Kingdom

Mining Fever Slot Review

Released March 2020

The Mining Fever slot game can be found at Microgaming casinos. Microgaming as a standard now publish the house edge information of all their slots at any online casino that holds a UKGC license (this is a requirement for all UKGC licensed casinos). As such we can say that the House Edge of Mining Fever is 3.87%. When playing at any venue that does not hold a UKGC license and does not specifically publish the Return to Player information for their game, this information should be used as a guideline only as we cannot confirm whether or not this game is configurable.


Mining Fever has, as I’m sure you have worked out, a mining theme. As with most mining themed slots your characters are dwarves, which in this case amount to 3 different colourful characters, all of whom add different modifiers to the Free Spins.

Mining Fever is a 5 reel game that is 3 symbols high. Instead of paylines you form winning combinations of 3 or more matching symbols across adjacent reels, with 243 different ways to win.

Special Symbols

Wilds – The Wild symbol will substitute for all symbols other than Scatters. There is more than one Wild symbol but the main one, the one available in the base game is a set of “Mining Tools”.

Scatters – There are 3 Scatter symbols, each one represented by a different Dwarf. There is a Red, Green and a Blue Dwarf. If you can land 2 or more of the same colour you will trigger the Free Spins feature.

Bonus Features

Free Spins – There are 3 different Free Spins features: “Driler Free Spins”, “Bombur Free Spins” and “Thundar Free Spins”. Landing 2 identical symbols will grant you 1 or 2 Bonus Free Spins, whilst landing 3 will award you 8 Free Spins. The maximum number of identical Scatters you can land is 3 and the feature cannot be retriggered. The 3 different versions are as follows:

Driler Free Spins – These are the green Free Spins. During them one randomly chosen reel will be filled with Wilds. That reel will change with each spin.

Bombur Free Spin – These are the red Free Spins. During them Bombur Wilds can land between reels 2-4 and when they do 2 Bonus spins will be awarded. On the first spin the Bombur Wild will act as a standard fixed Wild symbol. On the second spin it will explode and 3-4 Wild symbols will be added to random symbol spaces on the reels.

Thundar Free Spins – These are the blue Free Spins. During them if a Thundar’s Hammer Wild is added to the reels you will be given 1 bonus spin. During that spin reels 1 and 2 or 2 and 3 will be filled completely with Wilds.

Dwarven Gold Train Feature – This feature is only available during the Free Spins and it sees a train of Wilds make its way across the reels. It will be made up of 3 Wilds and will move one space to the right and wither one row vertically or horizontally with each spin. Once the train falls off the end of reel 5 it reappears again on reel 1 and the process continues.


Mining Fever is proof, if ever it was needed that Rabcat are supplying Microgaming with the best slots in their catalogue at the moment. It looks fantastic, with moving parts on and off the reels. It has 3 different Free Spins features, all of which come with the impressive Gold Train feature. It is fun, engaging, essentially everything I would want in a slot. Add to this a decent house edge and we are only a bonus game away from a perfect score.

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The United Kingdom of Great Britain and Northern Ireland sits to the north-west of mainland Europe. The United Kingdom shares a border with The Republic of Ireland and has coasts on the Atlantic Ocean, Celtic Sea, North Sea, Irish Sea and English Channel. The population of the UK is approaching the 67.6 million mark leading to a fairly densely populated land mass. The gambling sector in the United Kingdom is entirely regulated and licensed by the UKGC – the United Kingdom Gambling Commission. Should players resident In the UK wish to gamble with foreign based operators there is no history of this being treated as a criminal offence, but high levels of protection exist for UK residents playing with UK licensed operators.


The above information is what we believe to be the the legal status of online gambling, however information on this topic is limited and hard to find. We accept no liability for any errors or ommissions. It is the reader’s responsibility to ensure that they know the legality of online gambling in their country before engaging with any online gambling service.