NetEnt‘s Scruffy Duck has shot to the top of bet365’s Pennsylvania slots charts for May, delivering a surprise number one finish that underscores just how unpredictable player preferences can be month to month across North America’s competitive iGaming markets.

A Remarkable Turnaround for an Older Title

What makes Scruffy Duck’s ascent particularly noteworthy is that the slot dates back to 2017. Originally pitched as a modest, contemplative experience set in a duck pond, it wasn’t exactly pegged for chart dominance when it first launched. Yet something has clearly resonated with Pennsylvania players in recent weeks. The game’s relaxed pace and free spins bonus round have apparently struck gold, proving that age is no barrier to relevance in a crowded slots market.

Other mature titles made waves in Pennsylvania too. IGT’s Lucky Larry’s Lobstermania 2 (from 2016) and NextGen’s Mad Mad Monkey debuted at sixth and ninth respectively, suggesting a broader appetite for established, well-understood gaming experiences alongside newer releases.

Classic Themes Rule Across North America

The May charts tell a clear story across the US and Canada: players are drawn to jewel-themed and fishing-themed slots. In New Jersey, American Gaming System’s Liberty Diamond, a straightforward 3×3 gem game with a solid 94.00% RTP and 5,000x max win, climbed 25 places to secure second spot. Meanwhile, Ontario went all in on aquatic themes, with Pragmatic Play‘s Big Bass Halloween 3 taking the top position from day one. The Canadian operator also saw stellar performance across the country, with Big Bass Vegas Double Down Deluxe jumping 23 places into fifth.

New Jersey’s Reelplay title Hypernova Megaways made a different kind of splash, surging to number five in its home state before claiming the Michigan top spot entirely. It shifted from second place in April to first in May.

UK and Europe See Consolidation

Across the Atlantic, the picture looked different. Inspired Gaming’s Gold Cash Freespins held firm in the UK, though it’s clearly feeling pressure from Playtech’s Age of the Gods: God of Storms, which has climbed steadily since April. In Germany, Play’n Go’s Legacy of Dead reasserted dominance after a brief wobble, reclaiming top spot from Gamomat’s Royal Seven XXL.

A New Entry Worth Watching

One title that caught industry attention is Snowborn Games’ Volcanic Fortune, a Hawaii-themed slot that debuted in the UK top ten for May despite only launching the previous month. With a generous 96% maximum RTP, 6,250x max win, and medium volatility, the game offers an attractive risk-to-reward profile. It’s already found traction in Spain as well, entering that market’s charts at number four. Bet365 has marked it as one to monitor through June.

These monthly rankings do more than chronicle what players are spinning. They offer operators and suppliers real-time intelligence about market preferences, helping shape portfolio decisions and inform what gets greenlit next. For smaller studios like Snowborn, a strong debut can change everything.