Shamrock
Irish mechanical slot pairing doubling Wilds with progressive tiers
The SlotRanker Score is calculated from the visible data below. It is not affected by affiliate deals, and it cannot be bought.
Why this score
Sparse data (43%) — interpret with cautionFive weighted signals shape the composite. Four context signals refine ties. See how we rate for the full methodology.
Popularity blends real player search demand (~30 markets) with a catalogue-derived proxy; games without measurable search demand use the proxy alone. Not live play telemetry.
Slot Summary
How It Plays
Shamrock presents 3 mechanical reels and 9 active lines. Ordinary line wins follow the compact classic format, while special combinations route the result toward a progressive tier.
The Double Jackpot symbol substitutes for regular symbols but not the Bonus symbol. One such Wild doubles an eligible combination, while 2 multiply it by 4x.
Theme & Atmosphere
Irish luck supplies the visual shorthand, with Shamrock imagery, Lucky motifs, and traditional reel symbols keeping the game close to a casino-floor mechanical machine.
The Clover and Leprechaun associations frame the progressive prizes as pots of luck, while the presentation remains compact enough for the payline events to stay readable.
Features & Win Potential
The Wild Symbol also acts as a Multiplier. Its value depends on how many Double Jackpot symbols participate in the winning line, excluding progressive prizes.
The Progressive Jackpot uses symbol-specific triggers on active paylines. Different Double Jackpot and 777 combinations determine which of the 3 available tiers is awarded.
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Compare Shamrock with other games
 Shamrock Score 46This game |  9 Pots of Gold Megaways Score 83 |  Paddy’s Pooches Score 83 |  Clover Fest Hold & Win Score 81 |  Jack in a Pot Score 81 | |
|---|---|---|---|---|---|
| Identity | |||||
| Studio | |||||
| Released | 12/20/2021 | 4/4/2023 | 3/4/2025 | 3/1/2025 | 11/15/2018 |
| Math | |||||
| RTP | — | 96.1% | 96.19% | 97.1% | 96.06% |
| Volatility | — | High volatility | Medium/High | High volatility | High volatility |
| Max win | — | 5,000× | 5,000× | 1,000× | 1,743× |
| Format | |||||
| Reels | 5 | 6 | 5 | 5 | 7 |
| Layout | 5x3 | 6x7 | 5x4 | 5x3 | 7x7 |
| Paylines | 9 | 117649 | Cluster Pays | 27 | 7 |
| Min bet | — | 0.2 | 0.1 | 0.1 | 0.2 |
| Max bet | — | 50 | 250 | 100 | 40 |
| Features | |||||
| Progressive | ✓ | — | — | — | — |
| Wild symbol | ✓ | ✓ | — | ✓ | ✓ |
| Free spins | ✓ | ✓ | ✓ | — | ✓ |
| Scatter symbol | ✓ | ✓ | ✓ | — | ✓ |
| Multiplier | ✓ | ✓ | ✓ | ✓ | — |
| Bonus game | — | — | — | ✓ | ✓ |
| Respins | — | — | — | ✓ | — |
Every number is shown as a delta against Shamrock.
Questions & Answers
Shamrock FAQ
Atlantic Lottery publishes a theoretical prize payout range of 95.38% to 95.94% for Shamrock.
It substitutes for symbols other than Bonus symbols and can multiply eligible winning combinations by 2x or 4x.
Specific combinations must land on active paylines, with different symbol and line combinations awarding the available progressive tiers.
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