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7 Best Slot Games with Bonus Rounds (Games)

7 Best Slot Games with Bonus Rounds Games
Almost every modern slot machine contains additional games. Some slots provide gamblers with the opportunity to increase their winnings received during the spins — this is called the risk game. Others have bonus rounds that guests can activate by combinations of certain special symbols. Such elements include Scatter, special Bonus symbols, and other variants. Read on to learn what bonus round slots are all about and which of them are definitely worth playing.

Distinctive Features of Bonus Round Slot Machines

The developers of modern online slots tend to equip their products with various bonus rounds. Thus, they make games different from each other and spur the excitement of users. For example, the Novomatic company uses the risk round in its Gaminators, in which gamblers can multiply their winnings. To do this, they are to guess the colour of an upturned card.

NetEnt has a bit different approach. There are no risky rounds in their slots. Instead, the developer offers you free spins, which are activated by three Scatters. This option allows you to get extra benefits without using your own funds. Unicum makes each of its free bonus round slots truly unique. All developments of the company have completely different bonus games that are bound to appeal to both beginners and experienced users. Slots by Microgaming may have both free spins and additional rounds, depending on their type and theme.

How to Play Slot Machine Bonus Rounds

Generally speaking, new slot bonus rounds have in fact a high-profit potential, which is something to be aware of. In order to gain big wins by taking part in bonus games, users should primarily rely on their intuition and luck. That is to say, the rules in such games are usually identical to those of the main ones. Ingenuity and prudence will also come in handy: the gamer should perform deliberate and reasonable actions to understand what to do next, thereby successfully completing a game mission.

As far as the plot of bonus rounds is concerned, needless to say, that it’s closely related to the theme of the slot itself (not always, though). In other words, the bonus mode will complement the main game, being part of it, revealing its plot. So if you’d like to check out some bonus games with an interesting storyline that satisfies your taste, consider the theme the slot is actually dedicated to.

The Best Slots with Bonus Rounds

New interesting and fascinating slot machines continue to appear, and the variety of games at the moment can surprise even the most sophisticated gamblers.

Many players who have witnessed the era of "real" land-based casinos still prefer plotless classic online slots with simple gameplay. Conversely, the younger generation of users seems to be no longer impressed by traditional fruit slots.

So, the leading developers of software for Internet casinos competing for market leadership and popularity among players invent new ways to attract the attention of customers to their products. One of the most effective solutions is equipping slots with innovative original functions, including interesting bonus rounds.

Now the overwhelming majority of slot machines do have such a feature. But which are the greatest ones? How do you pick bonus round slots that stand out among similar variants? Check our list to learn about the top slots with bonus rounds. Some of them you might see for the first time as they are not so popular as, for example, Book of Ra or Immortal Romance, but still they are definitely worth mentioning.

  • Cash Farm (Novomatic)

Cash Farm slot by NovomaticCash Farm slot machine has a quite original design, which is supported by the interesting options of the game. The slot contains a Wild symbol represented by the farm. It can give you huge winnings and complete all combinations: the Farm is capable of transforming into any symbol other than a Tractor, resulting in significant payments.

The Tractor symbol will allow you to get winnings for emerging in any place in the screen — it’s a Scatter, which can also trigger a bonus round. If you get three to five tractors, you will find yourself on the field, where you look for your wins among the haystacks. Here the chances of gaining big profits are pretty high as the bonus round will only end when there is nothing under the haystack.

The peculiarity of the Cash Farm slot is the presence of a function called Reel Refill. It enables you to get the maximum number of prizes. This feature implies the emergence of additional combinations due to the disappearance of winning ones, in place of which other symbols will drop. This may lead to another win and greatly enrich the player.

  • Gonzo's Quest (NetEnt)

Gonzos Quest slotGonzo's Quest is one of the calling cards of the NetEnt brand. It invites players to plunge into the fascinating adventures of conquistador Gonzo and help him find the lost golden city Eldorado. Graphic design and background music nicely reflect the adventure theme.

You can get acquainted with the brave conquistador during the introductory video clip. As for the gameplay itself, it is interesting not only thanks to the exciting storyline but also the numerous original bonuses.

Among them is a completely unique function called Avalanche, which allows you to get a lot more winning combinations during one spin. The played pictures explode and are replaced by new ones, in the form of stones falling from above. Every successive Avalanche increases the winning coefficient by x1 (up to 5-fold multiplication).

The options Avalanche and Free Falls are available both in the main mode and in the bonus rounds (10 free spins), with the maximum bonus payout ratio being x15. However, each fall that does not end with the formation of a paid chain, takes x1.

  • Thief (NetEnt)

Thief slotThe bonus round of the Thief slot machine developed by the Net Entertainment provider entirely lives up to the title of the game. Since the slot is dedicated to the topic of innovative technologies acting as bait for fraudsters, the bonus offers the user to steal a precious diamond from the billionaire's mansion.


This model is equipped with unmatched graphics and superb animation effects. The appearance of three Adrenaline Scatters on the reels triggers the free spins mode, during which only the main character appears (a beautiful thief), symbols depicting her high-tech tools, as well as the most coveted symbol — a gem that brings the maximum payout of 5000 bets.

  • The Slotfather: Part II (BetSoft)

The slotfather the part 2The classic bonus round of Slotfather II is free spins triggered by combinations of Scatters. The number of free spins varies from 8, 12, 20 for 3 to 5 truck symbols respectively. A special feature of the bonus game is that the Wild symbol appears on all the reels except the first. The rewards for successful combinations are doubled.

After you spend all your free spins, the special bonus from the Big Boss will be activated, and you'll receive a prize from the godfather of the Italian mafia. The gangster spins of the Slotfather II machine are available when two vertical columns of the playing field are occupied by the image of one gangster. The verticals with the bandit remain motionless, the rest of the reels respin. If the mafioso has occupied as many as three vertical columns, you will get the Gangster Feature bonus round. On a special screen, the bandits divide the city districts: in front of each character there are cards, each demonstrating which part of the metropolis will be controlled.

  • Jurassic Park (Microgaming)

Jurassc Park slot Jurassic Park developed by Microgaming is based on the iconic movie about dinosaurs Jurassic Park. The interface design, musical accompaniment, and appealing symbols recreate the atmosphere of your favourite picture.

The main characters of the film and prehistoric creatures act as symbols here. The multi-level bonus round fully corresponds to the storyline as well; it is triggered by 3 or more Scatters (an image of a mosquito in amber).

Initially, only the first level is available to the player, other rounds open after the user has played a certain number of spins. Each level includes 12 free spins with different original options and is named after a particular dinosaur species — Tyrannosaurus Rex, Velociraptor, Triceratops, Brachiosaurus, Dilophosaurus.

There is also another extra feature called T-Rex Alert, which is triggered randomly. Once activated, additional Wild symbols appear on the reels, which significantly increases the chance of getting a win.

  • Dolphin’s Pearl Deluxe (Novomatic)

Dolphins pearl deluxe video slotDolphin’s Pearl Deluxe has gained immense popularity not only due to its interesting storyline and high-quality design but also due to an exciting and lucrative bonus round.

The extra mode is represented here by 15 free spins with a triple multiplier. It is triggered by the appearance of 3 or more Scatters in the reels pictured by the coveted shell with a pearl inside. Additionally, 3 pearls multiply the stake by 20, and 5 shells will give you x500. The number of bonus spins will increase if there appear three dolphin pearls or more.

  • Avalon II (Microgaming)

Avalon 2 slotOne of the most remarkable slot machines to date, and maybe the best slot with bonus games. King Arthur and his Knights return in the wonderful Avalon II by the leading online casino software developer Microgaming.

The Grail Bonus game is launched by getting three or more images represented by a sacred bowl. It sends the participant to a wonderful tour through the fairy kingdom. The main purpose of this round is to get the Grail and deliver it to the island of Avalon, where Arthur resides, in accordance with the legend.

If you complete this tour successfully, you will find yourself in the Lake of Legend quest, where you will need to roll the dice; the next is Excalibur, where the fragments of the legendary sword are reforged. A certain number associated with one of the fragments of the sword appears on the dice. If the numbers match, the fragment falls into place, and the number becomes a multiplier. In total, there are 10 possibilities to roll the dice.

The original Misty Value quest gives you fifteen free spins. In this round, you are to pick a symbol that will emerge as an extra Wild multiplier of x2. After the successful completion of these rounds, you can select one of the following options for the next bonus:

  • Whispering Woods. Choosing a shield with a certain multiplier (up to x160)
  • Forest Falls. Twenty free spins and a special Wild symbol

After two more additional rounds, you will proceed to the next game, where you must fight the Black Knight, attacking him and blocking his own attacks. The principal aim of the battle is to take back the Grail.

In the finish round, the user plays the classic Wheel of Fortune to obtain the last multiplier. This game reminds you of the best traditions of computer video games, allowing you to feel like a brave Lancelot.

Short Summary

Statistics reveal that many connoisseurs of gambling adventures prefer playing animated bonus rounds to spinning the reels in the main game. In fact, it is quite understandable: the activation of such a feature in itself is a rather encouraging sign, not to mention the enormous excitement experienced during a bonus round. In addition to the desired multiplication of winnings, it is in the bonus game that the user can feel like the main character, thereby being as much involved in the game plot as possible, getting into what actually happens on the screen. It is true that it's not the case with all bonus round slot machines, but some developers do succeed in creating such an effect. Try out the best slots with bonus rounds and see for yourself!

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Written by Kamen Valev
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