free online slot games with bonus rounds

Best 5 Free Online Slot Games With Bonus Rounds Today!


If you are looking for some fun and exciting online slot games, you might want to try out the free online slot games with bonus rounds. These games offer more than just spinning the reels and hoping for a winning combination. 

They also feature special rounds that can enhance your gameplay and boost your payouts. In this article, we will explain what bonus rounds are, how they work, and what are the benefits of playing free online slot games with bonus.

What are Bonus Rounds?

Before we provide you free online slot games with bonus rounds, you have to know that Bonus rounds are extra features that are triggered by certain symbols or combinations on the reels. They can vary depending on the game theme, design, and provider, but they usually offer some kind of reward or advantage to the player. a variety of frequently encountered bonus rounds include:

Free Spins

This is when you get a number of spins that do not cost you anything, but you can still win money from them. Sometimes, free spins also come with multipliers, wilds, or other special symbols that can increase your chances of winning.

Pick and Win

This is when you get to choose from a number of items or symbols that reveal different prizes, such as cash, multipliers, or free spins. You can either keep picking until you find a collect symbol or a predetermined number of picks.

Wheel of Fortune

This is when you get to spin a wheel that has different sections with different prizes, such as cash, free spins, multipliers, or jackpots. You can either spin once or multiple times depending on the game rules.

Cascading Reels: This is when the symbols that form a winning combination disappear and new symbols fall from above to fill the gaps. This can create more winning opportunities and trigger more bonus features on the free online slot games with bonus rounds.

5 Top Free Online Slot Games With Bonus Rounds

We will explore five free online slot games that come with captivating bonus rounds on the Istana138, enhancing the excitement and potential winnings for players.

1. Gonzo’s Quest by NetEnt

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Gonzo’s Quest is a visually stunning slot game developed by NetEnt. Taking place in the midst of the Amazon rainforest, the storyline of the game revolves around the escapades of an explorer from Spain named Gonzo.

The bonus round in this game is the “Free Fall” feature. When you land three or more Free Fall symbols on consecutive reels, you activate the bonus round, which grants you free spins with increasing multipliers. With each consecutive win, the multiplier increases up to 15x, offering players substantial rewards.

2. Thunderstruck II by Microgaming

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Thunderstruck II is a sequel to the popular Thunderstruck slot game, created by Microgaming. This Norse mythology-themed game offers a remarkable bonus feature known as the “Great Hall of Spins.” 

As you progress through the free online slot games with bonus rounds and trigger the bonus round multiple times, you unlock different levels featuring four distinct characters, each with unique free spin combinations and multipliers. This dynamic bonus system keeps players engaged and provides various ways to win.

3. Book of Ra by Novomatic

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Book of Ra is an Egyptian-themed free online slot games with bonus rounds developed by Novomatic. The bonus round in this game is triggered by landing three or more Book symbols, which serve as both scatters and wilds. Once triggered, you receive 10 free spins with a special expanding symbol. This symbol expands to cover entire reels, increasing your chances of forming winning combinations and leading to potentially significant payouts.

4. Avalon II by Microgaming

Avalon II is another free online slot games with bonus rounds masterpiece from Microgaming, taking players on a legendary journey through the world of King Arthur and the Knights of the Round Table. 

The bonus round, called the “Grail Bonus,” is a multi-level adventure featuring different locations and characters from Arthurian lore. With each level you progress through, you unlock new bonus features, free spins, and multipliers, creating an immersive gaming experience.

5. Cleopatra by IGT

Cleopatra by IGT is an Egyptian-themed free online slot games with bonus rounds that has captivated players for years. The bonus round in this game offers players 15 free spins with a 3x multiplier. Landing three or more Sphinx scatter symbols triggers this round, and you can retrigger it to win even more free spins. The combination of free spins and multipliers can lead to substantial winnings in this classic slot.

Final Words

Free online slot games with bonus rounds are a great way to have fun and experience the best of online slot gaming. They offer more than just spinning the reels; they also offer special features that can make your gameplay more enjoyable and rewarding.

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