Shamrock Holmes Megaways

(Microgaming) Slot Review

Author
James Hargreaves
Last updated: 12 March 2026

Playing Shamrock Holmes Megaways - First Impressions

When I first loaded up Shamrock Holmes Megaways, I was intrigued by the mash-up of themes. All41 Studios has taken the classic Irish leprechaun trope and fused it with a detective mystery, creating something that feels fresh rather than just another clone. The game plays out on a six-reel grid with an extra horizontal reel across the top, and thanks to the Megaways mechanic, the number of symbols shifts on every spin, offering up to 117,649 ways to win.

I spent a good few hours spinning these reels, and the Rolling Reels feature kept the pace lively. Every time I hit a winning combination, those symbols vanished in a burst of energy, allowing new ones to drop in. It is satisfying to watch a single spin cascade into a chain of wins, although like many high variance slots, I did have to weather some dry spells before the action really kicked in.

Shamrock Holmes Megaways slot screenshot

Symbols and Payouts

The paytable is a mix of standard royals and thematic high-value icons. The lower-paying symbols are your typical 9 through Ace, paying modestly even for six of a kind. The real value lies in the premium symbols: a bile wildflower, a shamrock, a pixie, and the detective himself. Shamrock Holmes is the most lucrative, awarding 50x your stake for six across a payline. There is also a wild symbol represented by a golden 'W' that appears on the extra reel, substituting for everything except the scatters to help connect those tricky wins.

Symbol Payouts

Symbol Payout
icon 1 6 → x50
5 → x25
4 → x10
3 → x2
2 → x1
icon 2 6 → x5
5 → x3
4 → x2
3 → x1
icon 3 6 → x2.5
5 → x1
4 → x0.5
3 → x0.3
icon 4 6 → x2
5 → x0.8
4 → x0.5
3 → x0.3
icon 5 6 → x1.5
5 → x0.6
4 → x0.4
3 → x0.2
icon 6 6 → x1.5
5 → x0.6
4 → x0.4
3 → x0.2
icon 7 6 → x1.5
5 → x0.6
4 → x0.4
3 → x0.2
icon 8 6 → x1
5 → x0.4
4 → x0.2
3 → x0.1
icon 9 6 → x1
5 → x0.4
4 → x0.2
3 → x0.1
icon 10 6 → x1
5 → x0.4
4 → x0.2
3 → x0.1
icon 11 Scatter
icon 12 Wild

Triggering the Magic Forest Respin

One feature that saved my balance during the base game was the Magic Forest Respin. It triggers when you land specific combinations of scatters and top-reel symbols. For instance, landing three coin scatters along with a Pixie on the horizontal reel grants a respin with a guaranteed 10,000 Megaways. If you manage to land three scatters with Shamrock Holmes on the top reel, that number bumps up to 32,400 Megaways.

The most exciting moment came when I hit the top tier trigger: three scatters combined with both the Pixie and Holmes on the upper reel. This guarantees a respin with the full 117,649 Megaways active. It doesn't guarantee a win, but with that many ways open, a payout is highly likely. It is a clever mechanic that teases the bonus round while offering decent potential on its own.

Free Spins and Infinite Multipliers

The main event is undoubtedly the Free Spins round, which requires four gold coin scatters to activate. You start with 10 free spins, and every additional scatter adds two more spins to your tally. What I love about this round is that it starts with a 2x multiplier rather than the standard 1x, and it increases by +1 for every single Rolling Reels win. Retriggering is possible too; seeing three or four scatters on that top horizontal reel awards extra spins, keeping the momentum going.

RTP, Volatility and Returns

Statistically, Shamrock Holmes Megaways offers a solid RTP of 96.44%, which is slightly above the industry average. However, be warned that the volatility is high. My session confirmed this with a hit rate of around 35%, meaning wins come frequently enough but massive payouts are harder to pin down. The betting range is somewhat narrow, capping at £20, but with a maximum win potential of 28,000x your stake, the rewards can still be substantial for patient players.

Shamrock Holmes Megaways slot screenshot

Final Verdict

In conclusion, Shamrock Holmes Megaways is a strong debut for All41 Studios using this engine. The blend of themes works surprisingly well, and the guaranteed Megaways in the respins feature adds necessary excitement to the base game grind. While the high volatility requires careful bankroll management, the potential for huge multipliers in the free spins makes the chase worthwhile for fans of the genre.

Shamrock Holmes Megaways slot screenshot 1
Shamrock Holmes Megaways slot screenshot 2
Shamrock Holmes Megaways slot screenshot 3
Shamrock Holmes Megaways slot screenshot 4
Shamrock Holmes Megaways slot screenshot 5

Shamrock Holmes Megaways Ratings

Theme & Symbols
59
Sounds & Music
52
Bonus Features
58
RTP (96.44%)
81
Max Win (28,000x)
81
Originality
46

Shamrock Holmes Megaways FAQ

Is Shamrock Holmes Megaways slot safe to play?
Yes. Shamrock Holmes Megaways is developed by Microgaming, a licensed and regulated game provider. The slot uses a certified RNG (Random Number Generator) ensuring fair outcomes.
Can I play Shamrock Holmes Megaways for free?
Yes, you can play Shamrock Holmes Megaways in demo mode right here on our website without any registration or deposit required.
What is the maximum win in Shamrock Holmes Megaways?
The maximum win in Shamrock Holmes Megaways is 28,000x your bet.

Shamrock Holmes Megaways — Comparison

Game RTP Volatility Max Win Rating
96.44% Average x28000 6
96.25% High x7000 6
96.17% High x6000 6
96.24% Average x2250
96.09% Average x4500
96.02% Average x1000
96.05% High x5000
96.6% High x5000
96.08% Average x2500
96.52% High x5600
96.08% High x5000
96.02% Average x2343 7
96.19% Average x11750
96.41% High x1100 7
96.32% High x1000 7
96.41% High x2500 7
96.45% | 94.01% | 92.05% High x5000 7
96.32% High x13000 7
96.12% High x500 5
96.37% | 95.49% | 94.02% | 92.05% High x6833 5
96.20% Average x2500 9.5
96.37% Average x1333 7
95.29% Average x2400 7
96.51% Low x2833 6
96.5% High x5000 8
Above average x5000
96.15% High x24185
96.07% High x10918 6
96.02% High x20000
96.42% High x12000 6.5