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First Deposit Only. Min. deposit: $10. Game: Big Bass Splash, Spin Value: $0.1. WR 60x free spin winnings amount (only Slots count) within 30 days. Max bet is 10% (min $0.10) of the free spin winnings amount or $5 (lowest amount applies). Spins must be used before using deposited funds. Deposit/Welcome Bonus can only be claimed once every 72 hours across all Casinos. Bonus Policy applies.

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Best Online Slots to Play

Online slots are without doubt the most popular casino games, and at Prime Casino, we offer a more extensive selection of games than any other casino operator. Today’s players relish the opportunity to immerse themselves in a myriad of fantastic online slots, spanning diverse themes and genres, all conveniently accessible from their device of choice.

Developers churn out numerous online slots each year, ensuring there's a game for every taste. Whether you're into movie and TV show-themed games, historical adventures, Irish-themed games, or even retro slots inspired by the classic pub fruit machines of yesteryear, we have you covered at Prime Casino.

In collaboration with over 60 of the industry's top game developers, we uphold a strategic approach of releasing an unrivalled number of new online slot games each month.

Transcend the ordinary and immerse yourself in an unprecedented selection of online slots, featuring diverse themes and gameplay styles for the best gaming experience.

Online Slots

How Do Online Slot Games Work

Online slots are very easy to play, while some games may have some additional elements, such as a unique pay structure, the general rule of thumb for how online slots work is as follows:


Select your chosen slot game. Make sure you check the game information so you know useful information such as payline structure and return to player (RTP).


Enter your wager using the bet selector, and configure any additional settings such as audio.


Click the spin button. The reels will then spin and stop at random. Many slots have unique payout structures, but in your standard video slot, you’ll find that winning combinations are made for landing three or more matching symbols across an active payline. Special symbols such as scatters and wilds can trigger bonus features or assist in payouts.


Any winning combination will be highlighted and all payouts are made per the paytable. When the player is ready they can click the spin button to spin the reels again.

Play Jackpot Slot Games Online

Jackpot slots are a very popular part of the online slot world. While some slots such as Megaways titles will have fixed jackpot prizes, other jackpot systems, such as the Jackpot King (JPK), system are progressive. This means that online slots connected to this progressive prize system can be worth hundreds of thousands if not millions. The total continues to rise until it is won by a player. Then it defaults back to its starting value.

Popular Online Slot Games To Try

The online slots world is so extensive, that it can be a bit overwhelming to know where to start. Luckily there is a selection of staple slot series that online slots fans have loved for years. Trying out these top titles can be a great place to embark upon your online slot journey.

Fluffy Favourites

Fluffy Favourites

Eyecon is the team behind the iconic Fluffy Favourites slot series. Where other developers were focussed on action, alluring females and titanic gods, Eyecon chose to give players something entirely different. Fluffy Favorite is an online slot series which features adorable stuffed animals and a carnival theme. Fluffy favourites have seen these plushies adventure to space, gain Megaways, and even transform into the popular Slingo format.

The Goonies

The Goonies

Licensed online slots are always super popular with players and the 1980s adventure movie ‘The Goonies’ has gained pop culture status over the decades. The Goonies slot series from blueprint features iconic characters such as Sloth and moments such as the ‘truffle shuffle’. The Goonies slots have taken the form of Megaways slot games, Jackpot King slots, and even an instant win online scratchcard.

Bigger Bass Bonanza

Bigger Bass Bonanza

Bigger Bass Bonanza is one of the most popular games in the fishing-themed online slot series ‘Big Bass Bonanza’ from developer reel kingdom. This bright and cheerful slot series follows the antics of a determined bass fisherman, and this slot uses a ‘catch of the day’ bonus element during free spins, where the fisherman can reel in fishes with cash values attached.

Fishin’ Frenzy

Fishin Frenzy

Fishin’ Frenzy is one of the defining online slot series of the Fishing slot genre. It is the creation of Reel Time Gaming, and has had numerous spin offs such as Fishin’ Frenzy Megaways and Fishin’ Frenzy Big Catch. A standout feature of this game is the fisherman symbol who ‘catches’ all fish symbols (which have cash values) during the free spins bonus.

Sweet Bonanza

Sweet Bonanza

The Sweet Bonanza online slot is a candyland-themed game from Pragmatic Play which has formed spin offs across popular casino genres such as Sweet Bonanza Slingo, and more recently the live casino game Sweet Bonanza Candyland.

Eye of Horus

Eye of Horus

The Eye of Horus online slot is from developer Reel Play, and is inspired by the gods of Ancient Egypt. First released in 2016, this genre-defining game has since had Megaways and Jackpot King variants created.

Common Online Slot Features

As mentioned, slots can come in so many different forms and themes, but there are a few features of online slots that are often universal.

Free spin

Free spins bonus rounds are a staple of online slots, and it’s often considered to be outside the norm if a slot omits one. Most commonly triggered by landing three or more scatters, free spin quantities can range wildly, with some slots offering around 6-10 at a low end, and others offering up to 50. Some slots allow free spins to be retriggered, and some free spins games will have modifiers such as the sticky wilds mentioned earlier.


The gamble feature is commonly seen in older or retro-inspired online slots. This is an entirely optional feature which players can choose to activate when they win. Players can use this feature to get a chance of increasing their win. Most commonly this is done by guessing the colour of a face-down playing card or with a ladder which players can scale, or drop down on.


Scatter symbols in online slots can form winning combinations when two or more of them land on the reels in a single spin in any position. Some scatter symbols take the form of bonus symbols, and typically three or more of them will grant access to a bonus feature such as free spins. Some scatters have a paytable value of their own, while others do not.


A respin is a single additional spin of the reels. In some online slots, this may occur to give players a second chance to form a winning combination and pins certain symbols in place while the rest spin. Other respins are seen in bonus features, with a countdown of respins on offer that get reset if the player can land more winning symbols.


Wild symbols are special symbols that can substitute for all other non-special symbols to form a winning combination. In some online slots, the wild symbol is the most valuable in the game. Wild symbols may also be subject to modifiers, such as ‘sticky wilds’ which stick in place for a set number of spins.

Our Top Slot Game Providers

There are a lot of excellent online slot developers out there, some of which have been around for years, and others are small independent operations which are showing their unique creative flair. However, there are a handful of developers that are particularly adored by slots fans, such as the following:

Red Tiger

Red Tiger

In 2014 a team of industry developers united to form Red Tiger Gaming (RTG). Since then, RTG has become well known as a pioneering developer with a strong emphasis on creating immersive themed online slots with high-quality graphics. Red Tiger also offers progressive jackpot slots as well as Daily Drop Jackpot slots.



Playtech has been around since 1999 and is a well-known player in the online casino industry. More recently Playtech has focused on live casino games, but they also offer a broad range of online slot games and have pioneered slot features such as the 'Cash Collect' system.


Pragmatic Play

Pragmatic Play was founded in 2015 and has created over 300 online casino games to date. The most well-known online slots from Pragmatic include Wolf Gold, Fire Hot, and Super X.

Common Online Slot Themes

Online slots can be categorised into hundreds of themes, but some slot themes are particularly popular among players.


Irish Game Theme

The ‘Luck o’ the Irish’ slot genre has been popular in brick-and-mortar casinos before internet gaming was imagined. It is slots with this theme (alongside fruit machines) that players will most likely picture when asked to think of what a slot looks like. The Rainbow Riches slot series is a dominant force in this green-tinted slot theme.


Fishing Game Theme

Big Bass Bonanza and Fishin’ Frenzy are just two of the smash-hit slot franchises that have come out of the popular fishing slot genre. There’s just something about the concept of casting your line and possibly landing the catch of the day that appeals to both developers and players alike.


Egyptian Game Theme

The Cleopatra slot franchise is one of the most defining game series of this genre, but there is also an exciting array of ‘book of’ slots featuring dashing archaeologists such as Rich Wilde Lorem found within this genre. Expect plenty of scarabs, gods such as Horus and a whole lot of sand!


Movie Game Theme

If a TV show or movie has a big fan following you can expect it to have a licensed slot inspired by it. Popular examples of this include the Rocky slot series and the slot series inspired by the 80s classic The Goonies.

Reasons to Play Online Slots at Prime Casino

Here are just a few reasons why our players love playing online slots at Prime Casino:

We Spoil Our Players with Exciting Promotions

Many online casinos solely focus on gaining new players with welcome offers, but we want all our players to feel valued. Because of this, you’ll find lots of fun promotions taking place on our site throughout the year. Some are seasonally themed, some celebrate a specific online slot or developer, and some are offered by SkillOnNet to players across the platform.

We’re Constantly Adding New Games

With so many developers, the online slot world moves fast. Because of this, if you are a big slots fan, you’ll want to never miss out on a new release. At Prime Casino we add tons of new slots to our site every month, so there’s no chance you’ll feel behind the curve.

We Offer Exclusive Access to New Games

Prime Casino is part of the SkillOnNet Network. Being affiliated in this way benefits our players because it means we get to be part of network-wide early access offers where players can enjoy highly anticipated online slots weeks before their global release.

Tips Playing Online Slots

Know What Volatility Means

Slot volatility is the measure of the frequency of wins and average win amounts on a given slot machine. A slot machine with low volatility will often pay out modest wins in quick succession, while a machine with high volatility will usually pay out large prizes spaced apart over numerous spins. Different levels of volatility are designed to appeal to different types of players, so consider this before you play your chosen online slot.

Gamble Responsibly

We advocate for responsible gambling, so when you play online slots, be sure to set yourself a budget and play limit, and stick to it. Pay attention to your mood when playing, if you’re getting frustrated, take a step back. If you’re on a losing streak, never chase losses, instead, step away.

Read the Game Information

Every online slot on our site will include game information. This information will provide details such as the game's theme, payline structure, bonus features, and more. Knowing this information can assist you in choosing the perfect online slot for you.

Pay Attention to the RTP

All casino games including online slots have a return to player percentage (RTP). This number represents the statistical value of funds a player will receive back when playing. The average RTP of online slots is 96%, and slots with statistics below this may be better avoided.

Use Free Play Mode

Our online slot games can be enjoyed in free-play mode. This gives you the chance to test out the game and learn its features before wagering real money. This way you can decide if you like the game risk-free and can avoid expensive learning curves.

Online Slots FAQs

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