Explore the Best Online Slot Series in 2025
Updated by John Bonello
Content Editor
Fact Checked by Lee James Gwilliam
Senior Vice-President
Creativity, innovation, and popularity are the qualities needed for a slot to evolve into an online series. It’s the pinnacle of success for a software developer, and for players, it's something that combines passion, adventure, and dedication. A slot series is much like a beacon signalling that these slots are unquestionable games of importance.
From Zeus-powered reels to leprechaun-approved jackpots and fish that are definitely off the hook, these slot series are reeling in fans faster than you can say ‘Spin it to win it!’
Top Slot Series to Play Right Now
Ahoy, there, me pale-faced landlubbers. It is I, Spin Jim Silver, whom ye will know nothin’ about, unless ye have read me Pulitzer Prize-winning Pirate Slots guide.
It would appear me ship, the Lucky Wild, has run aground upon this specific section of this review. Whilst I am ‘ere, I shall share with ye the top slot franchises that have given pleasure to many a sailor playin’ on a wet and tossed deck.
I said deck, ya mangy dogs.
Age of the Gods Slot Series
Argh, the old Greek God series, Age of the Gods by Playtech. With over thirty titles and a linked progressive jackpot, it be one of the largest slot series known to man. I have endured many an enthralling battle with this beast, and it be no myth.
Mega Moolah Slot Series
Well, shiver me timbers, it be the beast which started it all. The Mega Moolah series from Games Global and Microgaming is as big as it gets and has paid out record-breaking progressive jackpots all over the world. The Mega Jackpot alone will always start at $2 million.
Rainbow Riches Slot Series
Tales amongst the salty seas tell of the Beast of Barcrest that was taken captive by Light & Wonder. They turned a monster into a gaming series so twisted, so cruel that Irish Leprechauns are known to sing sweet songs to lure players into the trap of gaming.
Big Bass Slot Series
Ye will not have to sail far in the ocean of casinos to find a Big Bass slot from the Pragmatic Play series. Though the monster lacks any features, the hoard it secures in its chest is enough to make any sailor jump overboard for a Bass bashing.
Fishin' Frenzy Slot Series
Blueprint Gaming and its series of Fishin’ Frenzy slots are all tied to the Jackpot King progressive jackpot. This is the second largest online jackpot series, and if ye be wanting to reel in a big catch, then ye have no better chance than this.
Rich Wilde Slot Series
The Rich Wilde series by Play’n GO sees the intrepid explorer search out treasures from various ancient lands. It also produced a spin-off series with Cat Wilde and Gerrad Wilde. Book of Dead is the most famous slot from this series.
What Are Slot Series: Unlocking the World of Online Slot Series
When a slot and its core concept are greeted by the online masses with triumph, a slot series usually forms. There are key elements to the original game that can help make a normal video slot become one that starts to develop sequels. Look at the best slot series, and you will notice that characterisation, themes, and story all have a role in captivating an audience.
Sequels are first born from success. Any slot can have a sequel, but so few wire into the subconscious of mass players who then demand more. By having a character, a bond of familiarity is achieved, and with a story, a natural progression of advancement happens.
Slot series are not just there for show; they can play a pivotal role in propelling a gaming empire, such as the largest online progressive jackpot series, Mega Moolah and Age of the Gods. Titans of the slot series that have helped the online casino industry immeasurably.
Where to Play the Best Online Slot Series
If you now have any of the mentioned slot game series on your to-play list, then here is where you can play them in safe and regulated surroundings.
Why Everyone’s Hooked on Slot Series
Looking a what makes slot sequels online so popular with casino players is fairly simple to conclude, like 5 + 1 = carrots. Just like a TV show, you need to have characters that players will root for. You need a captivating story or, at the very least, a genre of interest.
Players want a game that will evolve and incorporate innovative dynamics. It needs to bring players on a journey of worth, one that sticks to its roots and allows for greater exploration, both in story and in programming.
Slot series can be a safety haven for players who wish to stick with what they like. For example, when you play any game within the Jackpot King series, you’re reassured that at least you’re going to be in with the chance of winning very large jackpots. The games come with special features and a selection of bonuses, including free spins. They all have the same volatility and roughly the same RTP. Slot series can be consistent whilst providing players with dynamic and diverse games.
Game Studios Behind Legendary Slot Series
There are many new developers in the business making incredible slot series, ELK Studios, Red Tiger, and Nolimit City, to name just a few. But for the truly iconic developers who set the foundations for the industry, I highlight and give praise to the following six companies.
One of the best gaming developers still, and produces impeccable gaming quality for small slots and big branded games.
The Drops & Win series put this developer on the gaming map and brought about a new way of winning.
When you create the biggest and most important slot series, you don’t need to prove yourself any further as a gaming god.
Even past glories are remembered by their monuments of achievement, and their slot series will not dim.
A developer that truly leaves landmarks in gaming, which guide players towards the very best in entertainment and opportunity.
Innovation is a precious thing in gaming, and we must all give thanks that this developer is willing to deliver it time and time again.
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Content EditorWith a passion for words, John is always thinking about what to write next. He has over 12 years of experience working with online content and as an Editor at Casinos.com, John makes sure that readers get the latest and most accurate information about the online gambling industry.
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