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Sherlock of London

RTP 96.03%
Play Microgaming Slots
Reels 5
Paylines 25
Min bet size 0.25
Max bet size 50
RTP 96.5
Wild symbols Yes
Free spins Yes
Bonus No
Jackpot No

Sherlock of London Slot Review

Released July 2019

The Sherlock of London slots game can be found at Microgaming casinos. Microgaming as a standard now publish the slots house edge information of all their games 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 Sherlock of London is 3.97%. 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.

Sherlock of London is a 5 reel game that is 3 symbols high. The game uses traditional paylines, with 25 in total, playing from left to right.

Special Symbols

Wild – The “Green Sherlock” symbol is the slot’s Wild, which will substitute for all symbols except Free Spins and Scatter symbols. If more than one “Green Sherlock” symbol lands on the reels then a path of Wild symbols will be created between them. Additionally, if there are two Wild symbols sitting on adjacent reels on the same row then the Wild symbols will merge and the “Double Wild” feature will be activated. When this happens, any wins involving Wilds on that spin will be doubled.

Free Spins – The Free Spins symbol is the “Blue Holmes and Watson” symbol. Three of them on the reels at once will trigger 10 Free Spins.

Free Spins Wilds – During the Free Spins and additional Wild symbol is available. The “Yellow Watson” symbol acts in the same way as the standard wild except paths are not created between two of them and the “Double Wild” feature is not available.

Valuable Symbols – Along with the Wild symbols the most valuable symbol in the game is the “22 B Baker Street” symbol.

Bonus Features

Connecting Wilds – The Connecting Wilds feature is triggered when you land at least 2 Wild symbols on the reels at once. When this happens a path of Wilds will form on the reels connecting the two Wild symbols and increasing your chance of a win.

Bonus Spins – If there is exactly 1 Wild symbol on the reels and that symbol is sitting on either reel 1 or reel 2 then you will be awarded 1 or 2 additional Bonus spins and the Wild that triggered the Bonus spin will remain in place for it. This will increase your chances of landing the Connecting Wilds or the Double Wild feature.

Double Wild – The Double Wild feature is triggered when you land two Wilds on adjacent reels. Essentially, it you do this you cannot form the Connecting Wilds feature but if you can use the 2 Wilds to create a win on a payline then your win will be doubled.

Free Spins – If you can trigger the Free Spins feature then you will be awarded with 10 Free Spins. During the feature the Connecting Wilds feature is available, as is the Double Wild feature. However, the Bonus Spins feature is not and has instead been replaced by an Expanding Wild. What this means is, if you land a Wild symbol on reels 1 or 2 and no other Wild symbols, then instead of the Bonus Spin that Wild symbol will expand to fill the reel. An extra Wild is also available, but the “Yellow Watson” Wild does not trigger the Connecting Wilds feature, the Double Wild feature, the Bonus Spins feature or the Expanding Wild feature. It will, however, substitute for all paying symbols.


Sherlock of London is a great addition to the Microgaming catalogue. It looks fantastic and comes with enough feature to keep even the likes of Holmes himself occupied. You get a lot of Wild features. So many that I couldn’t possibly go through them all again. You also get Free Spins, which when added to the all the Wild features makes this a game that will keep you on your toes. The house edge is a little higher than we would hope for and a bonus game would not have gone amiss.

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