If a video game or a movie breaks the box office, a sequel would usually follow to keep its fans happy, like the Fast and Furious series. This is exactly the same with online slot games. When a hit slot is created, expect a sequel (or two) and maybe even a slot series in the wake of its success. Especially over the last few years, the popularity of certain games has grown, resulting in series and spin-offs to scratch the itch of fans. Here, we'll showcase the most iconic slot series, spin-offs, and successors in 2026.
Written by: Gareth Leahy
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There are many slot series you'll come across in your gambling journey.
Just like how Marvel and DC are established franchises, you'll find that many providers will create games that often share the same characters, storylines, or mechanics.
These games are basically a continuation of the original, giving players a sense of familiarity.
They get to revisit the same characters and baseline idea, but often paired with evolved graphics and new features
More often than not, these series become the face of the studio, and something that they're most well-known for.
Some of our favourite slot series include those with pirate parrots, French raccoons, and royal potatoes – there's likely a series out there to suit every player.
Believe us when we say you can find more than your fair share of casino sites hosting these wonderous titles.
Slot series are exactly what they sound like: collections of games that share a common theme, storyline, or mechanics.
Basically like a movie franchise, but for online slots.
Instead of a one-off release, game studios will build a series or sequels off the success of an original idea, letting players revisit familiar character, often with fresh mechanics, themes, or graphics.
They also give players a sense of continuity.
If you loved one slot in the series, chances are you’ll enjoy the sequels too, with the same spirit but plenty of room for new surprises.
There are probably hundreds, if not thousands, of slot sequels and spin-offs on the market, so there's easily a franchise to suit every type of player.
We've gone through and reviewed hundreds of online casinos and tried to find the best slot series for you.
Sometimes, you'll find a single slot that really catches your attention, and you'll stick to playing that game.
However, for a lot of these big slot games, there is a whole world for players to explore.
Whether you're exploring a sequel to your favourite slot or diving into a whole new franchise of games, you deserve a top-tier experience, and we're happy to recommend our favourite sites to you – all licensed and regulated by the UKGC.
Here are our top casinos for playing slot series in a safe and regulated environment.
One of the main concerns with players is the similarity between games in a series.
However, there's also the counter-argument that the games have to feel similar, otherwise how do they fit together?
Developers make sure to make each game in a series is different in one way or another.
Whether it's with new mechanics or different volatility, slot developers will often make subtle changes between each game to invigorate new life into them, whilst retaining their familiar feeling.
Common additions to popular slot series' also include seasonal themes, like Halloween, Christmas, or Easter, to get players into the holiday spirit.
With Relax Gaming's Money Train and Blueprint's Fishin' Frenzy, the overall theme of the games stay the same, but the mechanics, volatility and RTP will keep it feeling fresh every time.
Just like how blockbuster films will spawn a sequel the following year, many game developers will follow the same strategy.
When a game proves to be a smash-hit upon release, it makes the most sense for a studio to capitalise on that success and build a sequel, or even a series, if there's enough demand.
There are some developers and game providers that are best-of-the-rest when it comes to creating iconic slot series, and are instantly recognisable, like Lucasfilms behind the Star Wars franchise.
Here are our top three studios that stand out when it comes to their slot series.
No list about slot series studios is complete without a mention of Reel Kingdom. They are the studio that made the fishing theme the big catch it is today, thanks to their Big Bass series. While some of their games may feel like copy-and-paste clones or seasonal reskins, there's no denying their appeal or large-scale success.
The Sweden-based outfit, ELK Studios, are the brains behind iconic slot series like Pirots, Toro, Nitropolis, Gold, and Tropicool, to name a few of their biggest examples. In fact, it's safe to say their entire brand is mostly built around the success of these spin-offs, as the games that really put them on the map.
Hacksaw are one of the most recognisable providers in iGaming, with their cutting-edge themes, high volatility maths models, and iconic characters. Some of their most popular slot series include Chaos Crew with Sketchy Skull and Cranky Cat, Smokey the Raccoon in the ‘Le' series, and Canny the Can in Keep'Em.
While the three studios we've name-dropped above are the reel (excuse the pun) masterminds behind some of the most successful slot series, they aren't the only ones making moves out there.
So many developers are throwing their hat in the ring, creating their own sequels and franchises and building on the success of some of their most popular titles.
Each of these studios below are known for their innovation, creativity, and often their humour, making each game they release iconic and special in their own way.
Here are some more of our favourite providers producing slot series' in 2026.
There's always some satisfying about seeing your favourite slot making a comeback, with familiar faces and a fresh spin, with that burning question: can it top the original?
Just like in film or TV, slot sequels and series give us a chance to dive back into the worlds we already love, often with bigger bonuses and bolder visuals.
Slot series let players chase adventure and big wins across every theme imaginable, all without leaving the house.
Before jumping in, check out our slot reviews and guides to see which sequels deliver the most bang for your buck.
Use this series page as your complete guide to the best slot series and the sites that provide them.
There are many contenders for this crown, and it’s hard to pick one. The list is long; there are many famous slots series to consider. However, some of the names that come to mind include Big Bass Bonanza, Riche Wilde, and Fishin' Frenzy.
Like all great series, we want to know what happens next! So, when a sequel lands on our lap, we can expect another entertaining slot game, new and improved features, boosted payouts, and fresh mechanics.
You can find a collection of slot series at all the best casino sites. Top UK sites will have compiled a far-ranging slots selection that includes all the latest and greatest slot series and spin-offs.
On this page, you will find a list of casino reviews where you can read and find out what each site has to offer when it comes to the best slots series. The casino site covers sites like Midnite, Kachingo, and Mega Riches.
Yes, many of the casinos on this page will offer demos on their slot series, where you can try them and play for free before risking any real money.
The simple answer is because they work and make money. If a slot becomes popular with players, it makes more sense from a financial standpoint to play things safe and release a series/sequel than start again from scratch with a brand-new idea.
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