Online Slots Bonus Features From A to Z 

Online Slot Games Bonus Features From A to Z 

Slots bonus features are those wilds, expanding reels, mini-games, free spins and many others that make a slot game more enjoyable and thrilling. Without slot bonus features, part of the thrill is gone!

Our team of experts at went through all of them to bring you some of the best bonus features! Let’s explore all there is to know about them!

Most Encountered Bonus Features in Slot Games

Most Encountered Bonus Features in Slot Games

We can list a million bonus features in slot games that are pivotal to improving your experience with the best casinos. But, some standard features are always in every gambling platform:

Feature What Does it Mean? Best examples
Autoplay The Autoplay Feature means you don’t have to click on a “spin” button to spin reels- all you have to do is wait and see for the outcome while the reels move by themselves. Starbursts and Mega Moolah.
Wilds You can trigger Wild symbols by landing on matching symbols to create a winning combination. Book of Ra and Immortal Romance
Free Spins Free spins are features that allow you to play spin reels on slots without incurring any risk. They can be triggered after your first deposit or certain symbol combinations. Gonzo’s Quest and Thunderstruck II offer the best free spin round with interactive storylines.
Bonus Rounds Bonus rounds are usually incorporated into a slot game. You can trigger them by landing on symbols or combinations. They usually include offers like wheel spins, picking objects, and minigames.  Cleopatra and Avalon II.
Scatters Scatter symbols, unlike wild symbols, activate other bonus features. They can be triggered by landing on three or more scatter symbols on your reels. Dead or Alive and Montezuma
Progressive Jackpots Progressive jackpots accumulate when you don’t win a jackpot game. They continue to increase until you finally win a jackpot game. Mega Fortune and Mega Moolah.
Gamble Features  Gamble Feature is a popular bonus offer that allows you to play a “double or nothing” with any amount you win on slots.  Vikings Go Wild and Book of Ra.
Paylines Paylines are patterns on your reels that determine or create winning combos. You can activate them by matching the symbols on a pay line. Twin Spin and Butterfly Staxx.

Other Unique Bonus Features for Enhanced Gameplay

Other Unique Bonus Features for Enhanced Gameplay

Aside from boosting your game experience, slot machine bonuses improve gameplay in online casinos. Here are some extra features of slot bonuses that help improve gameplay:

Win Both Ways Feature

The win Both Ways feature implies that you can win in two directions. They are in slots like Wild Toro and Starburst with an RTP of 96%.

Cascading Reels

Cascading Reels remove old symbols and cascade new winning symbols to give you more winning tactics. You will find Cascading reels in popular slots like Gonzos Quest and Bonanzas that offer an RTP of 96%.

Mystery Symbol Special Features

Mystery Symbol brings an unpredictable feeling to the slot world from its name. It is a unique feature of slot bonuses known for its exciting nature. It improves your gambling experience by changing into mystery symbols anywhere on the reels to trigger massive combos.

Megaways Feature

Megaways offers players more than one winning way on each spin.  It is a feature of casino games like Genie Jackpots, Megaways, and Bonanza. Two reputable software providers developed the games: Blueprint Gamebody and Big Time Gaming.

Expanding Reels, Wilds, symbols:

Expanding Wilds are features that replace other symbols on the reels, except scatter symbols – they are commonly found in Immortal Romance and Book of Ra Deluxe slots with an RTP of 95%.  Expanding reels are a good feature for players who enjoy exciting storylines.

Random Wild

Unlike regular wilds, Random Wilds appear randomly on your screen without any warnings and take effect immediately. Random wilds are triggered when you complete a free spin – They may also be available as an in-game bonus package.


Respins allows you to respin a particular reel more than once if you do the normal spins and don’t win anything. Popular games like Starbursts and Hotline offer this free spin feature -NetEnt provides both games. Slots with these features show you which pay lines are profitable and which combinations are available after choosing your reels.

Bonus game

Bonus games appear when you are done playing your normal rounds. These features can be triggered by matching a particular combination of symbols. The number of symbols you must match to unlock these features depends on the game. Some slots with bonus rounds allow you to access the features when you match 3 symbols, while others need you to match more than 3.

243, 720, 1024 ways to win:

The 243, 720, and 1024 ways create numerous winning possibilities. Stay with us as we explain how these features work. Imagine you have an average standard video slot screen containing five reels, three rows, and 15 symbol spots. Also, Picture the 15 spaces containing identical symbols. The 15-symbol result is behind the 243 five-of-kind payouts On 243 ways to win slots.

On the other hand, on 720 ways to win slots, there is a 3-4-5-4-3 arrangement – The arrangement helps you reach the 720 counts and offers more winning combos. Like the 243 Ways to Win slots,  A 1024 Ways to Win slot has five reels and three rows. The 243,720,1024 features are available on slots with unpredictable gameplay, such as Immortal Response and Siberian Storm, two games developed by Microgaming and IGT.

Colossal Reels by Blueprint:

Colossal reels occur when you combine normal sizes of columns to create 2×2, 3×3, or even bigger sizes; they are usually only available during bonus rounds. You can trigger them by creating matching symbols on your first reel. Games that offer colossal reels include Ted, Sausage Party, and Beavis and Butthead – powered by Blueprint.

Best Providers That Develop Slots With Bonus Features

Game providers create some of the most exciting slot games with profits and bonus features – famous examples of slot providers include NetEnt, Playtech, and Microgaming. Each of these developers offers unique designs, particular flagship slot games, and certain features and paytables to keep you glued to your screen when playing slot games.

Best Providers that Develop Slots with Bonus Features

  • NetEnt: NetEnt creates games that give players a movie-like experience.
  • Microgaming: Microgaming is a big name in the gambling world –  It created King Cashalot, Mega Moolah, and Major Millions.
  • Playtech: Playtech developed one of the first ancient-themed games. It is responsible for developing historical games like Age of the Gods, King of Olympus, and Fire Blaze.
  • Pragmatic: Pragmatic Play is the brain behind many exciting slots, including Dog House, Big Bass Splash, Buffalo King, and Release the Kraken 2

Our Favorite Slots With Bonus Features to Try Out

It is not enough to know how slot bonus features work. You also have to know which slots offer suitable bonuses for you. You can start by analyzing which features suit your budget and gaming style. If you are ever confused about which bonus feature to explore, you can try out free spins and no-deposit bonuses since you don’t need money to test them. They have their disadvantages, too – like high wagering requirements.

You will find more suitable bonus offers in slots like Starbursts, Book of Dead, and many more. We have created a table to show you some of our favorite slots:

Our Favorites Slots with Bonus Features to Try Out copy

Slots Bonus Features RTP Reels Providers
StarBurst Starburst offers various bonus features, like in-game jackpot, the Wild Symbol, Welcome bonuses, bonus rounds, and Bet Size.  Its low volatility also makes it popular amongst slots enthusiasts.  96%. Starburst machine contains 5 reels and 3 rows. Its layout allows you to create matched symbols on adjacent reels of ten pay lines. With this layout, you can create 20 winning combinations and get paid from the left or right.  NetEnt.
Book of Dead Book of Dead offers three major bonus features- Re-triggers, free spins, and scatters.  RTP of 95%. Book of Dead has five reels and three layouts. It also features 10 paylines.  Play’n Go
Book of Ra Book of Ra has bonus offers like Free spins, scatters, expanding symbols, and wild symbols.  RTP of 96%. It has a five-by-three reel structure. It also has 10 pay lines. Novomatic

Explore Them for Free With Casino Bonuses

Slot bonuses are not always accessible- some usually require a little investment or certain symbol combos. However, with bonuses like free spins, deposit bonuses, or no-deposit offers, you can try out slot bonuses for free with Bonus Features.’s Thoughts on Slots With Bonus Features

At, we believe that all slots with bonus features have something unique that you can benefit from.  But you need to understand that not all bonuses are right for you. We advise you to study bonus features thoroughly before choosing one to ensure you only play with suitable slots; otherwise, you’ll feel confused. Use knowledge to overcome confusion!