Slots are a staple of the online casino. Pretty much every online casino there is has a collection of slot games on offer to play. Some may offer a few dozens, while most have many hundreds, some even in the thousands. One of the many things that make slots so appealing is the fact that they come in a wide range of themes. Think of any subject and chances are there’s a slot or two based on that theme. From outer space escapades and underwater adventures to whimsical fantasy worlds and trips to civilisations of the past, there’s no limit to the sorts of things you’ll see slots themed after. There are even many themed after popular IPs, including successful movies, TV shows, musical artists, and the like. With so many themes, it’s no surprise that slots have such a broad appeal. The average casino has plenty of slots to suit all tastes, with multiple different topics represented. Here’s a list of top slot themes for 2018 that you’ll find at the online casino.


There’s something about Ireland that continues to appeal to players. There are loads of hugely popular slots based on all things Irish, from happy-go-lucky leprechauns to pots of gold and four leaf clovers. Slots with an Irish theme are usually very green and feature lively, vivid graphics. They’re lots of fun to play and are usually bursting with character. Some of the most popular Irish themes include Rainbow Riches by Barcrest, which is known for its many features and large payouts; Microgaming’s Lucky Leprechaun, which is based on sprightly leprechauns and is very entertaining and Golden Shamrock, a thrilling and enjoyable video slot from NetEnt.

Outer space/Sci-fi

Slots themed after outer space take you on an exhilarating journey throughout the depths of space, with symbols commonly featuring things such as planets, aliens, and spaceships. Invaders by Betsoft is based on classic sci-fi films set in outer space, while Supernova is a dazzling and thrilling slot by Microgaming. Without a doubt, the most popular slot in this category is Starburst, a NetEnt creation that’s packed with all sorts of exciting features and has lots of bright, vivid colours filling the screen.


Many people dream of landing a life-changing cash prize by playing slots. It should come as no surprise that there are a fair few slots themed after the lifestyles of the rich and wealthy. These slots tend to feature expensive luxury items such as cars, perfumes, pieces of jewellery etc. as symbols, and they usually have plenty of bonus rounds to help you land that big win. Two of the most popular slots based on luxury and riches are NetEnt’s Mega Fortune and Mega Fortune Dreams. Both of these are progressive jackpots that have changed the lives of several very lucky players, who now have riches of their own.


Most regard the desert city of Las Vegas as the world’s gambling capital. That explains why there are quite a few slots themed after the city in the desert, from Microgaming’s glitzy Vegas Dreams to Betsoft’s Mr Vegas. Slots themed after Vegas typically feature various images commonly associated with casinos and gambling, along with some that are more specific to the city of Las Vegas itself. They usually present themselves as glamorous and classy.


The Marvel superhero films are the world’s most commercially successful film series. Over the past few years, slots themed after various Marvel characters have made their way to online casinos. Playtech has developed numerous slots in this category, including Elektra, Iron Man 2, and the Incredible Hulk to name a few. With many more Marvel movies on the horizon, there are sure to be plenty more slots based on Marvel superheroes to hit online casinos over the coming years.

Ancient Egypt

These slots tend to feature well-known symbols and images associated with ancient Egypt, including pharaohs, pyramids, scarabs, the Sphinx, and various gods and goddesses. One of the most famous video slots with this theme is Mega Moolah Isis, a progressive jackpot from Microgaming that’s paid out a few seven-figure sums over the years. Other Egypt-based slots include titles based on the famous queen Cleopatra and others such as Playtech’s Pharaoh’s Treasure and Crown of Egypt, which is one of a growing number of slots to feature a large number of 1,024 paylines.

Game shows

Many people watch TV game shows wishing they could take part and have a chance of winning the big prize. Thankfully there are lots of slots based on hit TV game shows that put you right into the centre of the action and offer you the chance to win big. Slots like Who Wants To Be A Millionaire?, Jeopardy! And Deal Or No Deal recreate the most popular features from the show and make you feel as if you’re actually in the TV studio taking part in the real thing.


When it comes to adventurous themes, there’s nothing quite like venturing out into the wilds of Africa on a safari. Many slots aim to recreate this thrilling experience, providing players with an exciting slots adventure like no other. Some of the most popular slots based on Africa and its diverse wildlife include Ragging Rhino by WMS Gaming, which has a vast 4,096 ways to win, and Mega Moolah, which is widely regarded as the world’s most popular progressive jackpot thanks to its many seven-figure payouts. It’s even known as ‘the millionaire maker’!


You’ll find numerous slots themed after myths. The Age of Gods slot by Playtech is a progressive jackpot based on the gods and goddesses of Mount Olympus in ancient Greece. A few are also inspired by the deities of Norse mythology, with examples including Microgaming’s Thunderstruck and Thunderstruck II, NetEnt’s Hall of Gods and the recently launched Asgardian Stones, also by NetEnt. These slots transport you to mythical realms and typically feature representations of an array of powerful gods and goddesses.


Slots themed after the big blue ocean give you the chance to explore its vast depths. These slots typically feature colourful marine creatures such as fish, whales, dolphins, sharks and more - you may even encounter some sunken treasure along the way! Sunshine Reef is a bright and lively slot that takes you on a sunny journey to a reef filled with marine life, while Microgaming’s Enchanted Mermaid is a magical underwater adventure featuring a mermaid as the wild symbol. Others include Under the Sea by Betsoft and the pirate-themed Jolly Roger by Microgaming.