The 20 Best Online Slot Bonus Features

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  • Free Spins – The popular feature everyone knows and loves.
  • Scatter Symbols – the gateway to your bonuses.
  • Multipliers – Why have one, when you can have many?
  • Bonus Games – Put your skills to the test in these games within games.
  • Wild Symbols – Highly sought-after fan favourites with loads of variations.
  • Cascading Reels – Sit back, relax, and watch your slot symbols fall into place.
  • Gambling Feature – Are you ready to risk it all?
  • Respins – Will you be lucky enough to get another go?
  • Win Both Ways – Why go left-to-right when you can also go right-to-left.
  • 243 Ways to Win – Many ways to win means more ways to get a payout.
  • 1024 Ways to Win – Just when you thought 243 ways to win was generous!
  • Jackpots – Compete with players worldwide in the biggest jackpots out there.
  • Nudges – Is a symbol close but not close enough? Give it a quick nudge!
  • Split symbols – Split your symbols a higher chance of winning.

Understanding Online Slot Bonus Features

Slot bonus features are one of the many reasons why slots have become a staple in the world of online casinos, and with their colourful animations, dazzling special effects, and high entertainment factor, it is not difficult to see why.

If you're keen to discover what a slot game can offer you, then take a look at the top slot bonus features that can be found on many casino games. Don't fret if you're unable to activate these bonus features instantly, keep playing and you'll see what each of the games mentioned below have in store.

 

Popular Slot Bonus Features

Below is a list of the most popular slot bonus features and the top slots and casinos where you can try them out for yourself.

Free Spins

Invisible Man - Free Spins

Free spins are one of the most common bonus slot features found on both classic and video slots and are typically awarded when the player lands a particular symbol (or scatter symbol in the case of video slots) in an adjacent manner. Free spins are the simplest form of a bonus game but whether playing for the first time of the fiftieth time, this bonus feature will bring a smile to any slot player’s face.

NetEnt has a penchant for creating casino games with brilliant free spins bonus games. One such game is The Invisible Man. When the Policeman Wild and the Invisible Man Wild collide on the reels, a game of cat and mouse kicks off with exciting free spins ready to reward you!

Other great free spins games include Gonzo’s Quest and Dead or Alive – also created by NetEnt!

Play NetEnt online slots at Playamo Casino. Enjoy a €300 welcome bonus when you sign up for the first time. You’ll also be treated to 150 free spins on the best online casino games available. Terms and Conditions apply.

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Wizard of Oz
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Avalon II
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Age of Gods

 

Scatters

Stickey Bandits - Scatter Symbols

Scatter symbols appear in almost every modern online slot found at online casinos and can be a lifesaver when waiting for a win to land as they are the gateway to a multitude of slot bonus features. What is unique about scatter symbols is that they do not have to line up exactly for a player to be rewarded so regardless of where they are found on the screen, a slot bonus feature (free spins or a standalone bonus game) will be activated – making them immensely popular with players!

Quickspin has created the Sticky Bandits online slot which features exciting Bonus Symbols for a chance to win big while also setting off on a Wild West adventure.

Play Sticky Bandits and many other Quickspin creations at Paddy Power Casino! You can grab a €50 welcome bonus, plus 50 free spins when signing up for an account. Terms and conditions apply.

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Wheel of Fortune
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Britain’s Got Talent
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Mega Moolah

 

Multipliers

Rabbit in the Hat - Multipliers

Multipliers are a great way to increase your bankroll as all you need to do is land a specific symbol on the reels. Ranging from 2x upwards, multipliers come in many different variations and depending on the multipliers available (and how they are triggered), you can activate huge rewards in an instant.

Multipliers can also be added to online slots during other bonus games, such as free spins bonus features, where the more winning spins you land, the larger the multiplier that will be added to the overall prize at the end of the round.

Microgaming’s Rabbit in the Hat is one such online slot. Play the free spins round and you’ll find multipliers waiting to be claimed along the way!

Play Rabbit in the Hat and other fine Microgaming creations at Karamba Casino! A 100% deposit of up to €200 and 100 bonus spins will be yours for the taking when you create a new account with Karamba. Terms and conditions apply.

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Fruit Fiesta
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Cleopatra
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Age of Gods

Bonus Games

Fairytale Legends: Red Riding Hood - Bonus Game

Bonus games are fun and exciting games found within some online slots. These bonus features can appear in a wide range of forms including board games, different slot games, arcade games and many others – each with their own unique twist.

Slot bonus game are a great source of entertainment for most slot users and whilst they are triggered randomly by means of special bonus symbols, some games do require an element of skill from players. Overall, these games are some of the most popular slot bonus features amongst players far and wide.

If you want to experience a great slot with bonus games galore, spin the reels of FairyTale Legends: Red Riding Hood by Microgaming. There are multiple bonus games to trigger with exciting rewards along the way.

Play FairyTale Legends: Red Riding Hood and other Microgaming slots at Lord Lucky Casino! Enjoy a 100% bonus up to £500 with your first deposit, but don’t miss out on grabbing 25 free spins for Book of Dead too! Terms and conditions apply.

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Great Blue
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The Mummy
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Starburst

Wild Symbols

Vikings Go Wild - Wilds

Wild symbols work in the same way as a Joker during a card game in that they can replace standard playing symbols on the reels to help you create more winning combinations.

Game developers have experimented with wild symbols heavily which has given rise to numerous variations of this slot bonus feature including Expanding Wilds, Shifting Wilds, Stacked Wilds, Sticky Wilds, Transferring Wilds, and Random Wilds.

If you want to experience Wilds for yourself, try your hand at Yggdrasil’s Vikings Go Wild! Watch out for those crazy Vikings and win big.

You can play this Yggdrasil slot and many others at Betamo Casino! Get started with a generous welcome package that includes a 100% bonus up to €300 and 150 free spins on top-notch slots. Terms and Conditions apply.

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Mega Moolah
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Rainbow Riches
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Starburst

 

Expanding Wilds

expanding wilds

Expanding Wilds are symbols which can grow to fill the entire reel they land on. This gives you even more opportunities to create winning combinations across multiple rows – which can be especially lucrative if playing across a five-reel slot with numerous paylines.

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Eye of Horus
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Story of Hercules
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Fat Rabbit

 

Shifting Wilds

shifting-wilds slot bonus feature

Shifting Wilds, sometimes referred to as Walking Wilds, move to a different position around the wheels with each spin. These symbols will move one position in any direction at random until they shift off the screen. The longer the shifting wilds symbols stay in the game, the greater the earnings that a player will make.

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Wild Swarm
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Dolphin Cash
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Goldstruck

 

Stacked Wilds

Stacked Wilds act much like Expanding Wilds, as they appear stacked on top of each other up the reel. These popular slot bonus features can vary in height and can be seen in stacks of 2, 3, 4, or 5 symbols, covering all or part of the reel. Different online slot games use stacked wilds differently, so we suggest checking the paytable before playing to know what to expect.

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Age of Gods
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Golden Leprechaun Megaways
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Game of Thrones

 

Sticky Wilds

sticky wilds

Although the name might not sound very appealing, Sticky Wilds are some of the most desired and popular of all the wild symbols. Sticky wilds essentially stick to the reels and grant respins for a particular duration which gives players the chance to accumulate some seriously hefty payouts.

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Jurassic World
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Anubis Wild Megaways
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Release The Kraken

 

Transferring Wilds

transferring wilds

Also known as nudging wilds, these slot bonus feature symbols give you several chances to be a winner as you can pick up more winning combinations as they transfer across the screen. Often appearing on slots with multiple games playing at once, this symbol will help you land wins across all the games on your screen at the same time.

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Spartacus
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Epic monopoly 2
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Fire Queen

 

Random Wilds

random wilds

Random Wilds are a fun addition to any casino game. When you spin the reels and activate this bonus feature, you will have Wilds scattered randomly across your game. Some may help you land wins while others will simply fall away as the game progresses.

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Thunderstruck II
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Tahiti Gold
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Fat Rabbit

 

Cascading Reels

Gonzo's Quest - Cascading Reels

Cascading reels are an innovative slot bonus feature whereby instead of spinning, the slot symbols tumble from above and fall into place. If these new symbols form any winning lines, the symbols will explode from the screen and more new symbols will fall into place, repeating the process until no more winning combinations are left on the screen.

While commonly known as Cascading reels, this fun slot bonus feature may also be referred to as an Avalanche Feature, Tumbling Reel, or Rolling Reel.

No matter what you call it, Gonzo’s Quest is one of the best online slots around to show off this feature.

Play Gonzo’s Quest and other top NetEnt slots at CasinoLuck! Get started with a 100% deposit bonus up to €150 as well as 150 free spins! Terms and conditions apply.

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Gonzo’s Quest
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Golden Leprechaun Megaways
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Thunderstruck II

 

Gamble Feature

Gladiator - Gamble Feature

The gamble feature is a bonus game that is very popular with UK slot players but should be approached with caution.

Simple in design, when landing a winning combination on the reels, you will be presented with the option to gamble your earned winnings.

The simplest and most common form of a gambling feature involves guessing whether a hidden card will be red or black. If you make the right choice, you will double your winnings in an instant. If you make the wrong choice, you will lose everything.

Many slots, including Gladiator by Playtech, have incorporated the Gamble feature.

Play Gladiator or many other Playtech creations at PlayOJO Casino! Create a new account and make your first deposit to get an exclusive welcome bonus of up to 80 free spins right here at Top 10 Casino Sites! Terms and conditions apply.

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Game of Thrones
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Fish Party
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Isis

 

Respins and Retriggering

Bikini Party - Respin

Respins are a slot bonus feature that can come in one of two ways. The first way is that they happen automatically as you spin the reels (often triggered by a Wild or Scatter symbol) thus giving you an extra chance to spin and increase your chances of winning.

The second way comes at a cost where you will have to place a bet to get the respin. Once you’ve placed your bet and spun the reels, a Respin button may appear which will allow you to respin the reels once more.

Retriggering is very similar to respins but instead of having another spin on the slots, a bonus game will be launched again.

Microgaming’s Bikini Party slot offers players the chance to try out the Respin feature on this fun casino game!

Play Bikini Party and many more Microgaming online slots at Fun Casino! Sign up and you’ll be treated to 11 free spins, a deposit bonus of 50% up to €499, monthly tournaments and so much more! Terms and conditions apply.

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Pirate Kingdom Megaways
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Respin Racer
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Release The Kraken

 

Win Both Ways

Yokozuna Clash - Win Both Ways

A slot bonus feature that is increasing in popularity with online players, Win Both Ways (also referred to as 2 way pay) gives you the opportunity to create winning combinations in multiple ways.

Not only can combinations be formed from left to right on the reels, but also right to left. And whilst it may seem very simple, this unlocks a whole new world of possibilities for players where you can look forward to more wins, more frequently!

A great example of this feature is found on Yokozuna Clash by Yggdrasil.

Play Yokozuna Clash and other Yggdrasil casino games at Spin Slots Casino. Get your hands on a generous welcome bonus of 100% up to €500 as well as 100 free spins! Terms and conditions apply.

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Jungle Books
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Star Quest
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Turning Totems

 

243 Ways to Win

243 ways to win

On the topics of winning in multiple way, as the name implies, this online slot bonus feature gives players up to 243 ways different ways of getting a win and receiving a payout.

The way players can claim a win on 5-reel slots is by landing 3 or more specific symbols on consecutive reels. The line that is formed by these symbols does matter in this case so long as the symbols land on adjacent reels.

Having increased chances of winnings makes 243 ways to win very popular bonus features with all sorts of slots players.

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Jurassic World
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Terminator 2
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Game of Thrones

 

1024 Ways to Win

As slots moved online and developers had the opportunity to get more and more creative, an upgrade if 243 ways to win emerged and a bonus feature giving you a whopping 1024 different ways to get a win was born.

Paylines are non-existent in 1024 ways to win, and players are able to take advantage of every left-to-right combination regardless of where the matched symbols appear on the screen.

This means lots and lots of winnings for the taking.

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Kanpai Banzai
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Battle Maidens
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Jackaroo Jack

 

Jackpots

Mega Moolah - Jackpots

Jackpots come in many different forms. A fixed jackpot is one that is the most common and is set by the game creator. This is usually a set number such as 1000x your bet and can be triggered by landing a particular combination of symbols on the reels.

Progressive jackpots are far more interesting. Appearing either local or network-wide, progressive jackpots grow as more players make their bets and have the potential to result in a massively rewarding payout.

Local progressive jackpots grow as players at a particular online casino place bets with the resultant winnings then being paid out of that growing jackpot. There is often a limit set to how large a local progressive jackpot pot can grow.

When playing a network-wide progressive jackpot slot, the limits are nearly endless. Growing with every bet placed by players around the world, these jackpots can climb into the millions very easily giving one lucky gambler a moment that will change their lives forever.

The perfect example of a progressive jackpot that continues to create millionaires is Mega Moolah by Microgaming. While this slot may be old, it keeps players coming back for more with it’s 4 progressive jackpots that pay out big on a regular basis.

Play Mega Moolah and other progressive jackpot slots at Jackpot City Casino! Make the most of 4 deposit welcome bonuses where you’ll be treated to a 100% bonus of up to CA$1600 and much more. Terms and conditions apply.

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Mega Moolah
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Beach Life

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Mega Fortune

 

Nudges

nudge slot bonus feature

Found on classic online slots, the nudge feature is a relatively uncommon sight on modern casino games.

When using the nudge slot bonus feature, you will have the ability to knock one symbol of your choice down a reel to create a winning combination. While this was a manual feature when slots were first created, there still remains a handful of modern online slots which have this feature built into the mechanics of the game for veteran slot players to enjoy.

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Age of Asgard
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Rise of Maya
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Kingdom's Edge
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Dragon Tribe

 

Split Symbols

split symbols

Split symbols are a great feature that divides symbols into more than one icon on the reels. This means you can split your symbols and potentially rack up even bigger wins instantly as a result of an increased number of top-paying symbols appearing on the screen.

Symbols can be split into doubles or in some cases even triples which can give players the potential to land combinations of up to 15 symbols on a 5-reel slot!

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Scruffy Duck
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Flowers
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Mighty Africa

 

Slot Bonus Features That Shouldn't Be Ignored

While the top 10 slot bonus features listed above are the most popular choices, there are many features found while playing online slots that just as important.

You may have heard of terms such as volatility or RTP, but do you truly understand what they mean for your playing experience?

  • Volatility – Every casino game is designed with a particular volatility attached to it. You may come across high volatility, medium volatility and low volatility casino games on your search for the perfect slot. If you're spinning the reels of a high volatility slot game, you may discover that landing wins take longer than you're used to. That's due to the volatility which affects how often and how generously the game pays out. While landing wins on a high volatility slot may take slightly longer, when a win does occur, it's often very rewarding! The opposite can be said about low volatility slots. You'll easily see winning combinations roll in while playing these casino games, but the rewards are often smaller in size. Depending on the volatility of the slot at hand, it can greatly affect how you play and how you win, so be sure to choose wisely.
  • RTP – This term simply refers to the Return to Player rate of the game you're playing. The RTP of any given casino game can often be found in the paytable section. This rate, determined by the software provider, will let you know how much of your bet you can expect to win back over a certain number of spins. For example, if you're playing a slot with a 98% RTP, you can expect to win back €98 of every €100 that you bet throughout the game's lifetime.
  • Rotating reels – A fun bonus feature, rotating reels give you even more chances of being a winner as they rotate after the standard combinations have landed. Usually found during a free spins round or a similar bonus game, extra wins can be found when the rotating reels snap into place.
  • Autospin – One of the simplest features found on many online slots, you can put the Autospin feature to good use when you need your hands for something other than hitting the spin button. Set how many times you'd like for the game to continue without you, place your bet, and get started! But beware – use this feature responsibly as it can spin through your bet budget without you even realising it.
  • Paylines – Online slots are all about the paylines. Without the standard paylines feature, you wouldn't have any way to uncover awesome wins. Paylines on a casino game can from range from 1 to 100,000 as it all depends on the software provider and how they create the games you enjoy playing. The term “paylines” refers to how many lines there are for you to create winning combinations on, and, therefore, pay you.
  • Paytable – A paytable is a handy feature found on all casino games. Online slots have a paytable to reveal how a game can pay out wins. You'll often find the necessary combinations needed to create bigger and smaller wins, as well as an explanation of how the bonus features found on the game should behave.
  • Coin size – If you've ever placed a bet on any sort of casino game, you'll know just how important coin sizes can be. This simple feature is all about helping you place your bet. Choose your coin size based on your budget and affordability, place your bet and start playing! It must be noted that the coin size you choose will relate to how many coins you're betting over a single payline. If a game has more than 1 payline, the coin size will be multiplied to meet the necessary requirements.

 

Don't Let Slot Bonus Features Pass You By

As you can see, online casinos offer a wide range of different slot bonus features for their players to enjoy.

We hope that now that you are familiarised with the basics of each feature, that you will experiment with the different options available across all the top online casinos because ultimately, these fun features are designed to make you a winner.

Enjoy a wonderful online slot experience, that can be found at any of our top-rated online casinos, from the comfort of your home or even while on the go.

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