What are the Most Popular Online Slot Machine Themes?


When you register a real money account at a fully licensed online casino, you will normally have access to anywhere from 500 to 4,000 or more games, and many of these games are online slot machines. 

Some of today’s most popular online slot machines are revealed on this page. You can also find out where to find some of today’s best online slots from various leading online casino game development studios and software providers. 

What are the most popular online slot machine themes?

Today, you can find over 1,000 online slot machines from various companies, and all of these games can be categorised by theme. There are more than 30 common online slot machine themes out there, and some of the most popular slot themes out there today are the following:

  • Ancient Egyptian-themed slots
  • Norse Mythology-themed slots
  • Leprechaun/Luck O’ The Irish-themed slots
  • Ancient Rome-themed slots
  • Ancient Aztec/Inca-themed slots
  • Horror/Zombie/Vampire/Werewolf-themed slots
  • Science Fiction/Space & Stars-themed slots
  • Animals-themed slots
  • Fishing-themed slots
  • Sports-themed slots
  • Gold Mining and Diamond Mining-themed slots
  • American West/Wild West/Cowboy-themed slots
  • TV Show/Movie-themed slots

You can also find many fruits/food-themed slots, Valentine’s Day/love & romance-themed slots, and Christmas/Holidays-themed slots, to name a few top themes. The other popular online slots you can generally find at online casinos today are jackpot slots

A look at some of today’s best slots with the most popular themes

One of the most popular online slots out there today is the Ancient Fortunes Poseidon WowPot Megaways slot. Triple Edge Studios developed this famous jackpot slot, and it’s brought to you by another company called Games Global (a company that recently acquired Microgaming). 

This famous progressive jackpot slot has a Greek Mythology theme, and the jackpot in this game is currently worth more than $/€/£23.5 million!

One of the most popular Ancient Egyptian-themed online slots out there today is the iconic Eye of Horus Megaways Jackpot King online slot. Reel Time Gaming developed this one, and it’s brought to you by Blueprint Gaming. 

If you’re looking for Luck O’ The Irish/Leprechaun-themed slots, remember to check out the Wild Wild Riches: Luck O’ The Irish Megaways online slot from Pragmatic Play. 


The Thunderstruck – Wild Lightning: Link & Win online slot from Stormcraft Studios and Games Global is one of the most famous Norse Mythology-themed slots, and one of the most famous Ancient Aztec-themed slots is the Gonzo’s Quest Megaways online slot from Red Tiger Gaming.

If you want fishing-themed slots, remember to check out Pragmatic Play’s Big Bass Bonanza slot series and Reel Time Gaming/Blueprint Gaming’s Fishin’ Frenzy slot series. 

For those of you who want to sink your teeth into an excellent horror-themed slot, remember to check out the Halloween online slot from Games Global. 

Can I play online slots for free?

Yes, some of the online slots mentioned above are available to play in the free-play demo mode at trusted online casinos, such as 32 Red. The games that are generally unavailable in the fun practice mode are progressive jackpot slots and live dealer casino games. 

To play any of the games mentioned above for real money, you must be at least 18 years old. 

Final note

Gambling for real money comes with risks, so if you decide to sign up to a fully licensed casino, remember to gamble responsibly. In other words, never spend money you can’t afford to lose, and avoid chasing your losses at all costs. 

Many online casinos today have a ‘safer gambling tools’ section where you can set various limits, such as spending limits, session time limits, and daily, weekly, or monthly deposit limits. 

Don’t think of gambling real money as a job; never gamble with your hard-earned money while intoxicated. Finally, remember to have fun and never gamble out of necessity to ensure you have a much safer and more enjoyable experience. 


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