The 5 Best Online Slots of the 21st Century

Slots games are arguably the most played games at online casinos, and this comes as no surprise to anyone who knows anything about this exciting game. The game’s popularity comes from its plethora of themes, eye-catching design, immersive music, and huge payouts. The gameplay is simple and requires little skills, making it quite easy to understand even for newbies. Furthermore, players can use exciting bonuses like no deposit casino bonus to have more fun. They can be found here:

As such, we now have thousands of exciting slot games released by software developers worldwide, and the 21st century has seen the most impressive collection of games more than any other. Amid these thousands of slot games, several stand out above the rest due to their unique nature, impressive payout, jackpot, and other reasons.

In this article, we will look at the best 5 that stand out in the 21st century. And here are the best situs slot gacor site you can play for more winnings.

S/N Slot Provider Release Year Reels x Rows Paylines Bet Volatility RTP Progressive
1 Starburst NetEnt 2012 5 x 3 10 0.10 – 100 Low 96.09% No
2 Mega Moolah Microgaming 2006 5 x 3 25 0.25 – 6.25 Low – High 88.12% Yes
3 Book of Dead Play’n Go 2016 5 x 3 10 0.01 – 100 High 96.21% No
4 Immortal Romance Microgaming 2011 5 x 3 243 0.30 – 30 High 96.86% No
5 Bonanza Big Time Gaming 2016 6 x 7 117, 649 0.20 – 20 Medium-High 96% No


Taking the coveted number position is the Starburst slot by NetEnt. Although it has been around for almost a decade already, Starburst remains relevant and fun today and still manages to attract players to its reels regularly. We found this quite interesting because, unlike the Mega Moolah slot, it doesn’t have the much-coveted progressive jackpot that usually attracts players.

The reason why Starburst rose to stardom is a combination of its simplicity, win potential, and accessibility. The game boasts a colorful theme and background with dazzling graphics and a rich soundtrack. Starburst has a low to medium volatility and comes with 5 reels, 3 rows, 10 paylines, and a unique mechanic that allows players to win both ways.

Bonus Features

Surprisingly, there is nothing over the top on the reels of the Starburst slot when it comes to bonus features. This is why the game is quite popular amongst newbies and veterans alike. However, it has some features that make its gameplay more exciting,  for example:

  • Expanding wilds;
  • Respins;
  • Both ways pay.

Mega Moolah

Next on our list is the Mega Moolah by Microgaming. Launched in 2006, Mega Moolah is one of the best and the most popular slot games of all time. There is no denying that the popularity of this slot game comes from the impressive “Mega Moolah progressive jackpot” attached to it, which has turned many lucky players into millionaires over the years. Mega Moolah is one of the pioneers of progressive jackpot slots in online gambling. The game has an interesting Safari jungle theme with wild animals like lions, elephants, zebras, and others acting as symbols with nice safari music playing in the background. The gameplay takes place on a playing grid that contains 5 reels, 3 rows, and 25 fixed paylines.

Bonus Features

When it comes to bonus features, Mega Moolah keeps things simple and doesn’t come with complex features. However, it has a few exciting features that made it one of the best casino games online today, for example:

  • Wilds;
  • Free spins;
  • Bonus wheel game;
  • Mini, Minor, Major, and Mega jackpots.

Book of Dead

Rich Wilde and the Book of Dead slot is another game that deserves mention on our list of the best online slot games of the 21st century. It’s interesting that Book of Dead is similar to Novomatic’s Book of Ra slot, which started the popular “Book of” genre. However, while many may see this game as a rip-off of the Book of Ra slot, there is no denying that the Book of Dead slot is a great game that beats the latter in so many ways.

Accompanied by impressive visuals and vibrant music, the Book of Dead slot features an Ancient Egyptian theme and takes players on an adventure to visit Ancient Egypt with Rich Wilde to unearth lost reassures. The game itself has 5 reels and 3 rows with 0 adjustable paylines running across them.

Bonus Features

Regarding bonus features, there is quite a few to look forward to on the reels of the Book of Dead slot, and they include:

  • Wilds;
  • Scatter wins;
  • Free spins with expanding symbols;
  • Gamble feature.

Immortal Romance

Immortal Romance is a sci-fi vampire-themed slot game powered by Microgaming. It is arguably the best slot that showcases the cult of vampire mythology, which has been overly popular with slot games over the years.

What makes Immortal Romance one of the best slots to have graced the 21st century is that the game features an exciting storyline that thoroughly immerses players in the world of the four main characters, Amber, Troy, Michael, and Sarah. The game itself takes place on a playing grid that features 5 reels and 3 rows. The best part is that the game does not feature the often limiting payline mechanics. Instead, it features 243 ways to win mechanics, which increases players’ odds of landing winning combinations.

Bonus Features

Apart from its intriguing storyline, stunning visuals, and mesmerizing soundtrack, Microgaming has more to offer. When it comes to features and games, there are a few to look forward to on the reels of this game, and they include:

  • Wilds;
  • Wild Desire feature;
  • Scatter wins;
  • Chamber of spins feature with 4 different free spins games.


Rounding up our list of the top 5 best slots of the 21st century is the Bonanza slot from Big Time Gaming. Bonanza is one of the original slot games that started the megaways frenzy you see in the iGaming industry today, with many games coming with thousands to hundreds of thousands of ways to trigger a winning combination. Bonanza slot’s unusual grid layout, cascading reels, and massive winning ways took the iGaming industry by storm.

The slot has unique gameplay that mixes classical and modern mechanics and features. Naturally, due to its megaways mechanics, Bonanza features 6 reels, 7 rows, and 117, 649 ways to win. As for the game itself, Bonanza has a mining theme with impressive visuals and immersive soundtrack.

Bonus Features

When it comes to the bonus features on the Bonanza slot, players can look forward to:

  • 117, 649 ways to win;
  • Cascading reels;
  • Unlimited win multiplier;
  • Free spins;
  • “Reactions” feature.

This concludes our list of the best 5 online slots of the 21st century. These games are all available at most online casinos, and you can go ahead and try them out.