Online slots with bonus rounds

Online casino slots often incorporate one or more bonus games which reward players with additional win opportunities and boosted payouts. They may activate randomly or might require a certain symbol combination. Bonus mechanisms used in casino slots are extremely diverse and the resulting rewards are usually far bigger than any base game win.

Some bonus rounds are fairly straightforward and pretty much play automatically. Others necessitate your involvement and might take a while to understand. Free casino slot games with bonus rounds enable players to test the mechanism risk-free and thus learn what to expect once real money is at stake.

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Explore Free Casino Slot bonuses

Slot List

Iron Bank
Relax Gaming
Jungle Jim El Dorado
Games Global
Happy Ape
Genesis Gaming
Lava Gold
Buffalo King
Pragmatic Play
Pirates Arrr Us
Cash Wizards
Hotel Yeti Way
Play'n GO
Whale O Winnings
Rival Gaming
Trojan Treasure
Cats Royal
NoLimit City
Book of Clovers
African Safari
Voodoo Gold
ELK Studios
The Tipsy Tourist
Book of Doom
Games Global
Huangdi Yellow Emperor
Games Global
Thunderstruck II
Games Global
Fu Dao Le
Mamma Mia
Panda Party
Rival Gaming
Gold Fish
Hockey Hero
Push Gaming
Siberian Siren
Wild North
Play'n GO
Tomb of Dead Power
Where's the Gold
Viking Runecraft
Play'n GO

Find best bonus rounds at this online casinos

Types of bonus rounds at casino slots

Sign: Bonus round

A bonus round refers to an extra round when playing the slots but still allows you to win rewards. The bonus rounds in the online casinos can be divided into two categories, namely free spins round and bonus in games.

We shall cover free online slots with bonus round, different types of bonus rounds, introduce software providers and guide on how to select the best.

The free online slot machines with bonus games take entertainment and excitement to a whole new level. There are many types of bonus rounds that you can choose from. You are about to experience the best that the online casinos offer regarding the bonus rounds we have listed for you. The following are some of the common ones.

  • free spins icon


    Free Spins are usually activated by Scatters and their number depends on the number of triggering symbols. Some slots will allow you to retrigger the feature and win extra spins while some apply win multipliers. There are also those that offer a choice of different spins-multiplier combinations.
  • respins icon


    Re-spins may be triggered by specific icons or a win, or activate on random spins. Certain symbols (usually Wilds or winning icons) are held while other reels re-spin to hopefully deliver another payout or increase the value of the existing winning combo.
  • pick and click bonus icon


    Pick & Click bonus rounds offer a number of items to pick from and reveal either instant coin wins, additional free games, multipliers or other goodies. Sometimes you’ll need to match several identical symbols to win the respective reward.
  • wheel of fortune icon


    Wheel of Fortune features segments marked with different prizes. Players need to initiate a spin and then wait to see where the pointer will stop. Rewards most often come in the form of generous cash prizes, free spins and multipliers.
  • arcade games icon


    Some bonus rounds are designed as interactive arcade games which are truly fun to play. You may get to shoot at targets, fly planes or space crafts, engage in a combat or play a board game.
  • jackpot bonus game icon


    Casino slots bonus occasionally comes in the form of a progressive jackpot. Mega Moolah is probably the most famous example. Some pay randomly, some are triggered by a specified symbol combo and others engage players in mini-games.
  • gamble function icon


    A win may activate Gamble feature which offers an opportunity to boost the payout. Players can double or quadruple their wins by correctly guessing card colour or suit. They usually get up to five consecutive attempts.
  • bonus buy option icon

    Slots with Bonus Buy Options

    Bonus buy options are an impressive way of gaining access to helpful gameplay boosts. It allows for an exchange for the bonus features that will enable you to take advantage of the valuable bonuses and win more money. See the list below.

Top-Rated Online Slots Software Developers by Bonus Rounds

The slots software providers do not play the role of game provision alone to the casino operators. They also help in making sure the existing casino virtual software functions effectively.

Software providers have remained keen on expanding the gaming industry by creating fantastic games from time to time and offering the needed support. The free slots with bonus rounds are the most focused on games by software developers. Here are some of the biggest software providers.

  • big time gaming slots providers logo

    Big Time Gaming

    Big Time Gaming company has been known for being ahead of the rest in being innovative since its establishment in 1996. It’s always looking forward to creating games that match the needs of the players. Some of its slots include Temple Quest, Danger High Voltage, and Viking Quest.
  • netent slots providers logo


    Having been established in 1996, NetEnt has been winning awards such as Malta’s iGaming Excellence Award because of the quality products offered to its clients for the period it has been in operation. Online casinos providing NetEnt slots such as Mega Fortune have remained a preference among many gamers because they offer excellent games.
  • Pragmatic play slots providers logo

    Pragmatic Play

    Pragmatic Play understands that simplicity in gaming is the key to making gamers enjoy every game they play. That’s the concept they apply when developing free slots with bonus games for their clients. Even though it’s not a legendary company, it has offered some of the best slots, such as Wolf Gold, since its establishment in 2015.
  • Push gaming slots provider logo

    Push Gaming

    When you visit most casinos offering free slots with bonus rounds, you will realize they have partnered with Push gaming. It was founded in 2010 and has been providing the players with brilliant slots such as Dragon sisters and Golden Farm. It was established by James Marshall and Winston Lee, who wanted to provide the world with the best gaming services.


Enter Great Hall of Spins in Thunderstruck II by Microgaming

Thunderstruck II slot logoFive sequential activations of the special feature unlock a bonus game. There are 4 different ones, each awarding free spins plus an additional bonus feature: x5 multiplier (Valkyrie), extra spins (Loki), random Wilds (Odin) or Rolling Reels with multipliers (Thor).

Collect Properties in Monopoly Megaways by Big Time Gaming

Monopoly Megaways slot logoAfter each payout, Mr. Monopoly starts moving around the Monopoly board to provide opportunities for acquiring properties and building houses. These will prove invaluable during the free spins bonus round as they’ll either award additional spins or increase the multiplier.

Spin Wheels in Quick Hit Super Wheel Wild Red by Bally

Quick Hit Super Wheel Wild Red slot logoSuper Wheel Bonus awards a spin of the outer wheel and a chance to win one of four features – bet multiplier plus triggering symbols transformed into Wilds, instant cash wins, free spins with multipliers or free games with sticky Wilds.

Build Castles in Castle Builder II by Microgaming

Castle Builder II slot logoLand identical building materials to create building blocks and construct a castle. The better your castle, the more admirers will your prince or princess have to choose from. Each brings a dowry of a different value to their new spouse.

Play Successive Bonus Rounds in Reel Crime: Art Heist by Rival

Reel Crime: Art Heist slot logoWhile progressing through different stages, you’ll play different bonus rounds –select the painting (pick&click), choose tools (land 3+ thieves), escape police (symbol combos advancing your vehicle or the police car), prove the painting isn’t forged (pick&click) and avoid getting caught.

Slot machines
Nr. Slot name Provider RTP % (return to player) Paylines
1 Thunderstruck II Microgaming 96,65% 243
2 Monopoly Megaways Big Time Gaming 96,50% 117,649
3 Quick Hit Super Wheel Wild Red Bally 95,97% 30
4 Castle Builder II Microgaming 96,74% 15
5 Reel Crime: Art Heist Rival 94% 15

Best Tips to Choose Casino Slot with Bonus Rounds

Online slots are popular because of their fast pace, fun themes, exciting gameplay, incredible soundtracks, and jackpots with high payouts.

While you will be expecting to find the amazing features when you log into your casino site, it’s most probable that not all slots will offer you that. That’s why we compiled tips that will help you select the best casino slots.

  • Look for Slots with a Bonus Buy Option

    Look for Slots with a Bonus Buy Option

    Don’t let the casinos limit you on how much you can win at the casinos. Instead, always aim to utilize the available options when playing your favorite slots to maximize your wins.

    When you choose free online slots with bonus rounds, you will pay a premium for a bonus feature that will allow you to maximize your wins.

  • Megaways Slots with Free Spins Bonus

    Megaways Slots with Free Spins Bonus

    Are you looking for optimum winning lines? Considering slots with Megaways will allow you up to 167,649 winning lines. Megaways have top-notch revolutionary mechanics, and you should not leave them out. Check them out on your gaming platform, and you won’t regret opting for their slots.

  • Progressive Jackpot Bonus Game

    Progressive Jackpot Bonus Game

    The progressive jackpot increases every time the game is played. However, they are not easily won, but when it is won, the payout is always huge. Choosing slots that offer you progressive jackpots will be an ideal move if you are targeting a big win. You can always check stats to know when the jackpot was last won.

  • Popular Software Developers

    Popular Software Developers

    Software developers remain a focus of many players when playing slots. Playing free slots with bonus games from popular software developers such as Microgaming, NetEnt, and Big Time Gaming will enable you to enjoy your gaming session and make it memorable. Their gameplay is fantastic, and they have exciting themes for the players.


  • Pros

  • Special features offer an opportunity to spin reels for free or benefit from additional payouts. Players are thus able to boost their balance at no extra cost.
  • Casino slots with bonus rounds are far more engaging and more exciting to play than titles without special features. The gameplay is thus never dull, no matter how long one plays.
  • When using casino slots welcome bonus, one has to deal with the play-through requirement. In-game bonuses provide instant cash rewards that need not be wagered prior to withdrawal.
  • Cons

  • Multiple bonus rounds increase the complexity of the game; the more complex it is, the harder it is to understand. Trying to grasp complicated feature rules may be annoying.
  • Triggering bonus rounds in casino slots is sometimes extremely difficult. Players can consequently experience frustration and/or spend the entire budget before they manage to activate the special feature.
  • Triggering the bonus round doesn't necessarily guarantee an extraordinary payout.

Our Conclusion

Casino slots with bonus rounds have the potential to award additional wins and boost payouts at no extra cost. They are fun to play and may even allow players to influence the outcome by making decisions or applying skills. Familiarize yourself with bonus mechanisms by playing free casino slot games and follow other advice provided on this page to benefit from these generous opportunities as much as possible.

Great Bonus Offers to Test Bonus Rounds

What entices you to join a casino site? Most of the casinos have various ways of attracting gamers to their sites. For instance, they offer games with unique themes, graphics, and exciting pace.

However, that is not all that players are looking for. They have to give out bonuses to allow the players to try out various games on the sites. Fantastic bonus offers enable the players to maximize their winnings and also build on their bankrolls.

They will also minimize your risk of losing actual money to the casinos. Here are some of the bonus offers that you can try.

  • Leon Casino
    Welcome offer: C$4,500
  • Party casino
    Welcome Package: C$1,000 + 50 Free Spins
    This offer is not available for wagering within Ontario.
  • Bankonbet
    Welcome package: C$750 + 200 Free Spins
  • Tortuga
    Welcome Package: C$1,200 or C$400 + 150 Free Spins + VIP trial
  • Legzo
    Welcome package: C$1,500 + 500 Free Spins
  • CatCasino
    Exclusive welcome offer: 425% up to C$7,350 + 100 FS


🎰 What kind of bonus games can one find in online slots?

Most online slots offer a batch of free spins but you can also get to pick & click, spin the wheel of fortune, play arcade games and gamble for bigger payouts.

🎰 How can I trigger bonus rounds when playing casino slots?

The triggering mechanism varies. Some casino slots incorporate randomly activated features in addition to those that require a certain number of triggering symbols or a winning outcome.

🎰 Do I have to bet maximum in order to enter a bonus game?

Most casino slots with bonus rounds give players a chance to activate the bonus regardless of the bet size. Some, however, only let you trigger the feature if wagering the max.

🎰 Is it possible to launch a bonus game when I choose to?

There are titles that incorporate an option to pay for immediate entry into the bonus round. The price may be fixed or it may be decreasing as you play.