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Shamrock Holmes Megaways key art — Irish detective / Sherlock Holmes pastiche themed slot by Just For The Win, 2024

Slot Review

Shamrock Holmes Megaways

Just For The Win · 2024

Just For The Win's 2024 Megaways slot — an Irish detective pastiche of Sherlock Holmes. Six reels, up to 117,649 ways to win, cascading reels and an unlimited-multiplier free-spins round capped at 50,000× stake.

Quick facts

Studio
Just For The Win
Distributor
Games Global
Released
2024
Reels × Rows
6 × 7
Paylines
Up to 117,649
RTP
96.10%
Volatility
High
Max win
50,000× stake
Min bet
$0.20
Max bet
$30.00
Theme
Irish detective / Sherlock Holmes pastiche
Type
Megaways

About the game

Shamrock Holmes Megaways is Just For The Win's 2024 entry on the Megaways engine — a 6-reel slot where each reel can show 2–7 symbols, producing up to 117,649 ways to win on a fully expanded board. The theme is an Irish-flavoured Sherlock Holmes pastiche: a leprechaun detective named Shamrock Holmes, his sidekick Watson'Brien, magnifying glasses, pipes, four-leaf clovers.

Cascading reels apply to all wins — winning symbols disappear and new ones drop in, potentially producing chained wins from a single spin. The free-spins round is the math engine: triggered by three or more pipe scatters, it grants 10 spins with an unlimited rising multiplier (each cascade increments it by 1 with no cap). The ante bet — a 25% bet increase — doubles the trigger rate of free spins, which the math makes worthwhile if you're playing for the bonus rather than base-game.

Key features

  • Megaways engine — up to 117,649 ways
  • Cascading reels with chained wins
  • Free spins with unlimited rising multiplier
  • Ante bet doubles scatter trigger rate
  • 50,000× stake max win

Screenshots

Shamrock Holmes Megaways base game screenshot — 6×7 reels
Base game
Shamrock Holmes Megaways bonus round screenshot — free spins feature
Bonus round

Where to play

CasinoGPT's top-rated Ontario-licensed casinos. Shamrock Holmes Megaways is available in the slot library at most of these operators.

CasinoGPT lists Ontario-licensed (AGCO/iGO) operators only. We do not link to or endorse unregulated sites.

Frequently asked questions

What is the RTP of Shamrock Holmes Megaways?
96.10% in the standard configuration — close to the Ontario industry average. Some operators may host lower-RTP variants — confirm via the in-game info screen.
How does the unlimited multiplier work?
The free-spins multiplier starts at 1× and increments by 1 with each cascade — and there's no cap. A single hot free-spins round can build the multiplier into double or triple digits, which is how the 50,000× max win is achievable. Most rounds end with the multiplier in the single digits.
Should I use the ante bet?
The ante bet (25% bet increase, 2× free-spins trigger rate) is roughly math-fair — using it doesn't change overall RTP. It shifts your variance toward the bonus round, which is where the math sits. Players chasing the 50,000× cap typically use it; players who prefer base-game cascades typically don't.
Is this slot legal to play in Ontario?
Yes — provided you play at an iGaming Ontario / AGCO-licensed operator. The casinos listed above are Ontario-licensed. Playing on unregulated international sites from within Ontario is not legal and offers no consumer protections.

About the Expert: Andre Weston

Andre Weston - iGaming Industry Expert

Andre Weston | iGaming Industry Consultant

Andre Weston is an online casino industry expert with over 20 years of experience spanning casino operations, payments, player protection, fraud prevention, VIP management, and platform integrity. His expertise is grounded in real operational experience inside major global online casino environments, combined with extensive firsthand player experience across dozens of platforms worldwide.

19+ only. Online gambling in Ontario is regulated by AGCO and operated through iGaming Ontario. Play responsibly. If gambling is no longer fun, help is available at ConnexOntario (1-866-531-2600, 24/7).