According to recent industry reporting, the online casino sector is positively booming.

As of 2021, the global online gambling market was valued at a whopping $75.41bn and is expected to grow by a further 12% CAGR by 2030. This means that by 2030, we could see the sector hit a total valuation of $205bn!

Although there are many factors behind this staggering level of growth –including both a changing regulatory landscape and the growing popularity of online games during the pandemic – certain trends within the industry have helped to boost online casino operators’ revenue.

One of these factors is the growing popularity of online slots, which have proved a hit with online casino fans in recent years.

Online slots have proved popular with new and experienced casino players alike as they are incredibly easy to pick up and play while also offering a massive diversity of options to play, thanks to the easily adaptable format.

With online casino developers bringing out new variations practically every week, however, it has become increasingly difficult to keep track of which games are worth playing. This is a particularly pressing problem, given that the quality of these games can often vary quite significantly!

With this in mind, what are the best slot machine games out there?

Book of Dead

As one of Play’n GO’s most popular titles, Book of Dead is almost single-handedly responsible for the revival in Egyptian-themed slots. However, although many developers have jumped on the pharaoh-themed bandwagon, there aren’t many that do it as well as Book of Dead!

Book of Dead follows the now legendary Rich Wilde on a treacherous adventure deep into the tombs of the ancient Egyptian pharaohs. Along the way, Wilde faces his fair share of mystery and adventure. If you have ever fancied yourself as Indiana Jones, this could be the perfect title for you!

Book of Dead features a solid range of bonus features, including free spins and wilds, big bonuses, a solid RTP and a truly epic storyline you can’t help but get sucked in by!

Book of Ra Deluxe

If you are a fan of the adventure-themed slot games from the likes of Play’n GO then you will love this exciting title from Novomatic!

Book of Ra Deluxe builds on the successes of the previous titles in the Book of Ra series and packs in a bunch of added features as well as improved graphics. In terms of how it plays, Book of Ra Deluxe is a high volatility slot, with 10 fixed paylines and an RTP of around 96%.

Despite the simple gameplay mechanics, Book of Ra Deluxe combines epic storytelling, gorgeous audio-visuals and strong bonus features to deliver a gaming experience that is truly like no other!

Big Bass Bonanza

Out of the many titles that leading games developer Pragmatic Play have released over the last number of years, there are few that are as well-loved as Big Bass Bonanza!

Despite the deceptively simple format and game mechanics, Big Bass Bonanza packs a huge punch when it comes to playability.

Big Bass Bonanza has a five-reel, three-row format with 10 fixed paylines up for grabs. It also benefits from an RTP of around 96.7%, which fares particularly well when compared to other similar slot formats. Add to this medium variance and plenty of bonuses, and you have yourself a recipe for a good time!

With that said, if you are looking for a slot with memorable graphics, excellent wilds and bonuses, and medium volatility that will keep you on your toes, we think you will fall for Big Bass Bonanza – hook line and sinker!

Gonzo’s Quest

Gonzo’s Quest is one of NetEnt’s first and most-loved platinum slot games. In it, you follow in the footsteps of the 16th-century Spanish conquistador – Gonzalo Pizarro – on his quest to discover the ancient city of El Dorado.

Gonzo’s Quest features lush graphics and a plethora of exciting features to keep you on your toes. It sports an RTP of around 96%, mild to high volatility and 20 paylines. And despite being a little over a decade old, Gonzo’s Quest holds its own against even the most recent slot games.

So, if you want to get lost in the lush forests of El Dorado and to strike gold, check this classic game from NetEnt out!