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Top 10 slots with bonus games to try online for free or for real money

Profile Picture: Simon Young

August 10th, 2021

Casinos are cool and fun, but there was once a time when using a slot machine was not the most exciting pursuit. You span three reels over and over – and one of the best things was pulling the lever.

Fast forward to today, and slot machines have become incredibly sophisticated. It's all video graphics, awesome sound, and integrations of mechanics like Megaways, which gives players up to 117,000 ways to win on a single spin. Try telling that to someone in Las Vegas in 1975!

With the new technology came extra layers of gameplay that have morphed into what we call bonus games today. Usually, by landing three or more of a particular symbol in the game, you might trigger the bonus, which may be in the form of free spins but is often a lot more.

This guide gives you 10 of the best slots with bonus games, many of which are available right here at TwinSpires Casino. Enjoy!

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1. Starburst

While we wouldn't say it was the best bonus feature in the world of slots, Starburst gets a top mention here because it is the most successful slot game over the last decade. Look for wilds on reels 2, 3, or 4 on this five-reel space-themed NetEnt slot because they will expand to fill the whole reel. You then get a free re-spin in the Starburst Wilds feature.

Another wild on a different reel adds another reel of sticky wilds, and this can happen up to three times. If it does, you can win a whole world of cash – perhaps enough to buy a trip into outer space.

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2. Gordon Ramsay Hell's Kitchen

The fiery Scottish chef now has his own video slot, and Hell's Kitchen is a fun game with plenty of graphics and sound from the TV star himself. It's all engrossing stuff, but we love the bonus action.

Match three of Gordon's famous staring eyes symbols to launch the feature, where you pick a team in the cook-off competition. Win the contest, then select items from behind the menus in a pick-and-win style game to see what you've bagged for your wallet.

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3. Divine Fortune

Fans of Greek mythology love Divine Fortune, which is set beautifully in an ancient temple beside two giant statues. You play along with symbols like the snake-haired Medusa or the Phoenix across 20 paylines.

The bonus game is from the Pegasus (winged white horse) Wild symbol. If it lands, you get one free spin, and the symbol then falls one row down to row two or row three (or off the bottom). If it falls to row two or three, you get another spin. Land another wild elsewhere in this feature on another reel, and you get another re-spin. And if another wild lands on a reel with a wild on already, the whole reel turns wild. It's wild, and you can get some wild wins. Oh, and get three Free Spin symbols to get some free spins, too.

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4. Guns N' Roses

I met Slash from Guns N' Roses once in the Bahamas. There's a double name drop for you , and I don’t care. Anyway, it's not just because my new hat-wearing best friend features in this slot: the five-reel game from NetEnt has plenty of neat features – not least, you can choose one of five Guns N' Roses classics to play along to, including "Sweet Child O' Mine" and "Welcome to the Jungle."

The base game is fairly standard, but the bonus action is cool. Land three bonus LP symbols and spin the wheel to determine which feature you activate. Will it be Encore Free Spins, Crowd-Pleaser Bonus, or coin wins? You could be on a first-class ticket to Paradise City.

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5. Mega Moolah

When you look for the biggest slot wins of all time, many of them, running into the millions, have been on Microgaming's Mega Moolah slot. Thanks to the incredible progressive jackpot, British Army veteran Jon Heywood won £13.2 million with a 25p spin on this game.

The different thing about this bonus is it triggers completely randomly while you play. If you land the feature, you will win one of four jackpots – and all you do is spin a wheel to see which of them you win—simple and mind-blowingly rewarding.

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6. Lightning Horseman

Based on the tale of the headless horseman, Lightning Horseman can take you on quite the ride. It's beautifully pieced together by Lightning Box, with atmospheric sights and sounds set in a terrifying forest.

With wilds and then the lightning symbols bringing electrifying free spins, there's all to play for in the bonus round – so long as you can keep your head.

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7. Irish Pot Luck

They say you need the Luck of the Irish, so let's hope you have it while playing this fun Irish Pot Luck slot game from NetEnt. There are lots of things going on with this charming game, but the big action comes with the Pot Luck feature.

The bonus is triggered randomly, adding Wild, Scatter, and Jackpot symbols to the reels – and it's these that can launch the all-important Jackpot Wheel feature. There are big cash prizes, a free spins feature, and bet multipliers. Maybe you'll find the elusive pot of gold at the end of the rainbow?

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8. Cleopatra Gold

Who hasn't fallen for the famous charms of this Egyptian ruler? Most Romans did, that's for sure. But the allure of this 20-payline IGT slot lies in the gameplay.

Tap your feet along to the Ancient Egyptian soundtrack and try to launch the lucrative Gold Spins feature, adding new reels and extra chances to win as you play Cleopatra Gold.

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9. Elements: The Awakening

Battle with the four classical elements of fire, water, earth, and air/ice (not Earth, Wind & Fire – that was a U.S. soul band who made "Boogie Wonderland"). Anyway, Elements: The Awakening from NetEnt has a neat bonus feature.

The game has the avalanche mechanic, where winning symbols disappear to be replaced by more from above. Land this four times on a spin to launch the bonus action. You will now play the feature with one of the four elements swishing across the screen as the free spins action unfolds. It's bold, dramatic, and rather noisy.

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10. Narcos

Without wishing to promote drug use or organized crime, I would urge you to try Narcos, the NetEnt slot about the drug wars based on the Pablo Escobar-inspired TV show. There are 243 ways to win with the slot matching symbols in any position across the five rows.

There's plenty of action in this slot, including free spins, Walking Wilds, the Drive-by Feature, where flying bullets activate prizes, and the Lock-Up Feature. Win some serious cash, but don't spend it on anything illegal.

Play Bonus Slot Games at TwinSpires Casino

Most of these free slots with bonus games are available to try now at TwinSpires Casino. Simply create your account, claim your generous welcome bonus, and head to the slots section to try out some of the slots with bonus games. Good luck.