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Slot machines are the most popular option at casinos in the UK. According to The Atlantic, American casinos earn 70 per cent of revenue from slot machines alone. While there are many different variations, such as single-coin, video, buy-your-pay, and progressive machines, slot machines with bonus games are among the most appealing.

Different Types of Bonus Game Features

Bonus games are an additional feature that users can activate during gameplay. They can be triggered with a series of symbols, typically, three scattered symbols, a pair or more, or at random. These opportunities give players a chance to win extra money without wagering more tokens.

All bonus games are different. Each one offers distinct features to reel in prospective and active players. Some common features include free spins, re-spins, and instant cash prizes. There are also Pick Me games where users can win prizes based on randomized selections and wild cards, which work as a bonus reel during a spin.

Features of a Great Bonus Game

The bottom line is that a great bonus game is one that you enjoy. The fact you are playing real money slot machines is merely a bonus (no pun intended.) Here are some of the characteristics that make for exceptional gameplay experience.

Frequency

A slot machine with bonus games might have the best extra level ever. However, that bonus is worthless if it only shows up once in a blue moon. Ideally, the machine should reward players with a regular stream of bonus games.

Prize Amounts

Players want to feel as though they have something to gain from bonus games. While doubling the prize may seem appealing on the surface, the incentive will wear thin quickly. Bonus games should offer a significant pay-out.

Fun Factor

Perhaps most importantly, the bonus game should be fun. While everyone’s definition of fun is different, players should find the experience engaging. No one wants to play real money slot machines mindlessly.

Avalon II (Microgaming)

Avalon II features a quest to retrieve a grail and return it to Avalon. During the adventure, players can discover eight bonus games. When the bonus is triggered, the map will light up with a new location, such as Lake of Legend, Forest Falls, and Whispering Wood.

The bonus games feature free spins, rolling reels, and pick and win options. What sets Avalon II apart from its counterparts is the compelling storytelling. If users play long enough, they will get a chance to play the Grail bonus round, which is arguably the most entertaining of all.

Beverly Hillbillies (IGT)

The Beverly Hillbillies ran for nine seasons and nearly 300 episodes on television, so it is easy to see why its popularity translated to real money slot machines. The interface features five reels and 25 paylines with the option to wager up 125 coins per spin. The slot machine also has some of the most generous bonuses and progressive jackpots.

The Beverly Hillbillies slot machine has even spawned a series of sequels. One, the Millionaire Mile video slots, has a bonus game where users earn boxes of real money. There are also opportunities to win free spins and extra coins.

Book of Ra (Novomatic)

The Book of Ra isn’t the only Egyptian-themed classic on this list. Like its brethren Cleopatra, Book of Ra is a popular crossover that became famous at land-based casinos before moving to online and mobile gambling sites. The game features classic Egyptian iconography, including hieroglyphs, golden statues, and Sphinxes.

The bonus game is particularly tantalizing because players are prone to prolonged dry spells. This volatility means players can win sizeable jackpots, if and when they finally hit. The key is to activate the bonus round, which offers ten free spins and features expanding wild symbols.

Chest of Plenty (Ash Gaming)

Users can take over the high seas by capturing ships and securing pirate’s booty in Chest of Plenty. The slot machine features five reels and 20 paylines with colourful graphics and an intricate backstory. Players can take home as much as 10,000 coins on a single spin if they get the female pirate, Chesty, to appear five times.

If the treasure map appears three, four, or five times, a bonus game is triggered. A second screen appears at one of three locations and lets users spin a wheel to move around the new island. During the spin, players can earn mystery prizes, which also multiply the total bet.

Chest of Plenty features a second bonus called Treasure Chester Scatter. After a player registers three treasure chest icons on a spin, the game depicts different jewels in the centre of the screen. Based on the type of gemstone, the user can win a stake in a progressive jackpot.

Cleopatra (IGT)

Cleopatra is one of the most iconic real money slot machines. The Egyptian-themed game includes five reels and 30 paylines, which have stood has a high watermark for gaming design. Players can earn a bonus round that provides for 15 free spins and a 3x multiplier.

The game is distinctive with its use of Egyptian culture, symbols, and language. The vibrant colour palette ensures the slot machine will never lose its allure, even while others create edgier bonus rounds. Players can bet anywhere from one penny to $10 and walk away with a 10,000-credit pay-out.

Elvis the King (IGT)

Elvis has re-entered the building. The King lives in this multi-line video slot that features three bonus rounds and a bevy of additional games. All players have to do is trigger the bonus with special symbols on the second, third, and fourth reel.

Once the bonus begins, users can choose from two free spin options and a pick’em bonus. The free spins feature a roaming wild reel, which lets players boost their potentially winning lines. The pick’em bonus displays in the elevator of the Heartbreak Hotel and awards progressive pay-outs the more levels the player climbs.

Family Guy (IGT)

Anyone that enjoys Family Guy will love this slot machine. It features sharp animation with characters and icons from the show. There are also four bonuses, such as the Chicken Fight bonus, where Peter Griffin fights an oversized chicken while awarding prizes along the way.

Other bonus games include the Drunken Clam, where players can win 1,000x their bet, and Trigger the World, where Stewie Griffin spins a globe to award a randomized prize. There are even free spins that come with extra wild symbols. IGT has versions of the Family Guy slot machine for in-person play, as well as computers, tablets, and mobile devices.

Pink Panther (Playtech)

The Pink Panther takes inspiration from the television show and movie of the same name. In the same way that the main character, Inspector Clouseau, has detours during his investigation, so too does the game. The Pink Panther slot machine offers four bonus games that come up randomly during play.

Options include Crack the Pink Code, which provides multipliers and additional wild symbols, and Wheel of Pink, which features a multiplier bonus. The most unusual of the four is the Colour Pink bonus game. It shows the Pink Panther and Little Man painting a wall of pink and blue numbers. After they finish painting, the slot machine adds the pink figures and uses it as a multiplier on the player’s bet.

The Walking Dead (Aristocrat)

Low risk and high reward is the modus operandi of The Walking Dead slot machine. The penny slots let players bet up to three dollars and potentially win half a million. Those that want to sit down and play this slot machine, though, will have to go to The Mirage, Aria, Excalibur, The Palms, or Arizona Charlie’s casinos.

The reels feature crisp graphics of popular Walking Dead characters while the show’s icon serves as a wild. The slots have five bonus games, such as Wild Attack, which randomly inserts a wild, and CDC Wheel, which offers free credits and prizes for a grenade icon. Additionally, there are several bonuses for activating the Escape from Atlanta Free Games.

Zeus (WMS Gaming)

Five reels. 30 playlines. Many more ways of winning. Zeus is a fast-paced slot machine that is among the best products from WMS Gaming. The device has vibrant illustrations, sweeping soundscapes, and exciting bonus opportunities.

If three or more thunderbolts are triggered on a spin, a lucrative bonus game is activated. Three symbols merit ten free spins, while four symbols earn 25 free spins and five symbols win 100 free spins. What makes Zeus particularly fascinating is that players can receive additional free spins during the bonus round so that the extra play can continue indefinitely.

The Bottom Line

Bonus games can make all the difference when it comes to the enjoyability of real money slot machines. They add an entertaining and fun way to get more out of the game experience without putting down another wager. When it comes to the best slot machines & gambling sites not blocked by gamstop, it is challenging to go wrong with any option on this list.

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