Shamrock Holmes Megaways Online Slot

Published: 2020 Nov 27 | Updated: 2021 Jan 15
Game Provider: Microgaming

Developed by All41 Studios on behalf of Microgaming, the Shamrock Holmes Megaways slot is a PC and mobile game that stars a leprechaun detective. It’s a 6/7 reel game where you have up to 117,649 ways to line up symbols for a win, and comes with the popular Rolling Reels mechanism that can lead to several wins in a row. You can trigger respins, and there’s a free games feature with an unlimited win multiplier. Prizes in this high volatility game can reach 28,000x your wager, or 560,000.00 if you have the maximum wager on the triggering spin.

Licensing Authorities and Testing Agencies

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Slot Set-up and Betting Options

  • 0.2 Minimum Bet
  • 20 Maximum Bet
  • 117649 Paylines
  • 7 Reels
  • 560000 Maximum Win
  • Yes Autoplay Option
  • Yes Multipliers
  • No Progressive
  • No Random Jackpot
  • Yes Scatters
  • Yes Wilds Symbol
  • Yes 3D Graphics

Shamrock Holmes Megaways Online Slot Review

A wood-effect grid of symbols floats in the air, surrounded by trees. This is the setting for the Shamrock Holmes Megaways slot machine, which you can visit on PCs, or on mobiles using the Android, iOS, and Windows operating systems at the best mobile casinos. Perhaps the first thing you will notice is that each reel has a different number of symbols on it, and that’s down to the Megaways system, used by All41 Studios under license from Big Time Gaming.

You could see as few as 2 or as many as 7 symbols on a reel at any time, and it gets easier to claim a win with more symbols creating more ways. Those symbols are largely made up of playing card icons, in a vaguely Celtic style, along with flowers, a pixie, clover, and Shamrock Holmes. He’s a cheerful guy in green tweed and a deerstalker hat, holding a magnifying glass.

Gold coins combined with the pixie, Shamrock, or both, trigger respins with a high number of Megaways guaranteed. Rolling Reels can give you win after win, and during a free games feature, a multiplier rises on each Roll in a series. It’s here that you are most likely to land a vast 28,000x your wager at one of the top slots sites.

How to Play the Shamrock Holmes Megaways Slot

Like many Megaways slots, the wager range is somewhat limited, with options from 0.20 to 20.00 per spin. You simply click the little stack of coins on the control panel to open up the various wager options, and once you pick a level, you’re ready to play.

The double arrow button activates automatic spins, and the 9 dots tab takes you to the Shamrock Holmes Megaways slot paytable. This reveals how much you win from matching symbols anywhere on adjacent reels from the left side. Shamrock Holmes pays the most, returning 50x your wager for a series of 6 across all reels.

It’s all very easy to manage, and works just as well across the desktop and mobile versions.

Free Spins & Other Features of the Shamrock Holmes Megaways Slot

A golden ‘W’ can act as others if needed, but only appears on a horizontally-spinning reel above the middle 4 main reels. All symbols in a win will vanish and in a Rolling Reels system new ones drop down to fill the spaces, potentially creating a new win and triggering further rolls, with no limit to how many.

The gold coin with a clover is a scatter symbol, and if 3 land at the same time as the pixie, you get a Magic Forest Respin, with a guaranteed 10,000 ways to win across the reels. If the coins land at the same time as Shamrock Holmes, there’s 32,400 ways in the respin, and if both characters are on the triggering spin, the maximum 117,4649 Megaways are active for a free spin.

Four gold coins trigger 10 free games with an initial 2x multiplier on any win. During this round, the respins can still trigger, and any wins in a Rolling Reels series will activate a multiplier that rises by 1x in each. Once again, there’s no limit to how many Rolls you can trigger, so theoretically, no limit to how high the multiplier can climb.

Maximum Wins, RTP, & Volatility of the Shamrock Holmes Megaways Slot

Despite the theoretical unlimited multipliers, the maximum possible win is set at 28,000x your stake, or 560,000.00 at the 20.00 wager level. Shamrock Holmes Megaways is a high volatility game and there’s an average return to players percentage of 96.44%.

Our Shamrock Holmes Megaways Slot Machine Verdict

The Irish theme, exciting features, and potential to grab vast win multipliers are just some of the attractions of the Shamrock Holmes Megaways slots game. Rolling Reels are a good way to claim several wins in a row, and the respins with a guaranteed number of Megaways will usually be enough to create a decent win. In the free spins, with rising multipliers, the Rolling Reels become even more valuable.

Help Shamrock Holmes to discover the biggest wins when you play this PC and mobile-optimized slot at the best online casinos featured here.

Meet Our Slot Tester

Adam Kenny

Senior content operations specialist at

With over 12 years of experience in online gaming, Adam has seen, played, reviewed, and tested hundreds of slot games. He is always keeping an eye out for new features, themes, and potential jackpots by testing slot games even before they are released to the market.

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