Many factors inspire online slot machines, including human civilisation, animals & wildlife, mythology and folklore, pop culture, sports, horror, science, and technology.

Revealed on this page are today’s most popular themes of online slot machines that many of today’s best online slots can be labelled as having. We have also included the names of several of the world’s most famous slots that fall into one or more of these popular slot categories. 

What are the most popular themes of online slot machines?

You can now find over 4,000 online slot machines from over 100 online casino software providers and game development studios. Many of these slots are available to play in free mode, or through low-commitment offers. For instance, you can find rated $10 deposit offers on casinos.com. 

Online slots are often categorised by how many reels they have, what type of bonus features and game engines they have, how many paylines/win ways they have, by their volatility (RTP % payout rate), and by type. 

Another way you can filter online slot machines today is by its theme. Without further ado, the most popular themes of online slot machine today are the following:

  • Ancient Civilisation – Ancient Egypt-themed slots, Ancient Rome-themed slots, Ancient Aztec-themed slots, Ancient Inca-themed slots
  • Mythology – Greek Mythology-themed slots, Norse mythology-themed slots, Chinese mythology-themed slots, Mesopotamian mythology-themed slots, Indian/Hindu mythology-themed slots, Atlantean mythology-themed slots, King Arthur/Arthurian Legend-themed slots, Celtic mythology-themed slots, Persian mythology-themed slots, Roman mythology-themed slots
  • Luck O’ The Irish – Leprechaun-themed slots, Irish folklore-themed slots, Pots of Gold/Rainbows-themed slots
  • American West – Cowboys-themed slots, Wild West-themed slots, Gunslinger-themed slots, Native American-themed slots, Bison & Buffalo-themed slots
  • Gold Mining – Diamond/Gold Mining-themed slots, Prospector-themed slots, Gems & Jewels-themed slots
  • Las Vegas – Casino-themed slots, luxury lifestyle-themed slots, wealth & money-themed slots, high roller-themed slots
  • Pop culture – Movie-themed slots, hit TV show-themed slots, famous rock band/singer-themed slots, game show-themed slots, actor/celebrity-themed slots
  • Nature – Animals-themed slots, nature and wildlife-themed slots, cats & dogs -themed slots, African animals/wildlife-themed slots, Amazon jungle-themed slots
  • Horror – Vampire-themed slots, monster-themed slots, zombie-themed slots, ghosts/paranormal-themed slots

You can also find many other popular online slot machine themes, including sports-themed slots (e.g., soccer/football, basketball, ice hockey, tennis, basketball, cricket, horse racing, motorsports and others), science fiction-themed slots (e.g., space & stars, galaxies, alien invasion, time travel, hi-tech, etc.), and many dinosaur-themed slots.

Some games will only fall into one of these slot machine themes, whereas others can be classed as having more than one theme. 

Examples of today’s best online slots with the most popular themes

Here are a few examples of today’s most famous online slots with popular themes. They are brought to you by various market-leading software providers and game development studios and can now be found at hundreds of fully licensed and regulated online casinos. 

However, depending on which country you live in and which casino site you sign up to will determine exactly which of these games you will be able to find. For example, at most online casinos today, you can find anywhere from 700 to 5,000 or more games from 10 to 90 or more different companies. 

The Book of Dead online slot from Play’n GO is one of the most popular Ancient Egypt-themed slots. The Age of the Gods jackpot slots from Playtech rank among the most popular Greek mythology-themed slots, and the Jurassic Park slots from Microgaming/Stormcraft Studios and Games Global rank among the most famous Dinosaur/Movie-themed online slots. 

You also have the Jumanji online slot from NetEnt (movies), the Wild Wild Riches: Luck of the Irish Megaways online slot from Pragmatic Play (Irish folklore/leprechauns), and the Immortal Romance: Mega Moolah online slot from Games Global and Microgaming (horror/vampires), to name just a few. 

Final note

When choosing which online slots to play, you may want to consider sorting/filtering the games by theme, where possible. It can help you find your favourite games in no time. 

Also, remember to try out a few different slot themes because you may like certain genres you never thought you would like. You won’t know if you don’t try.