Big Time Gaming Slots


There are plenty of slot developers who offer a bigger catalogue of games than Big Time Gaming. There aren’t many providers who have had as big an impact on the online casino world over the past few years as BTG though. We can say why in a single word: Megaways. Looking to get started right away? Check out their list of slots below.

Big Time Gaming are the brains behind the shape-shifting game mechanic that has revolutionised the online slots world. In our complete guide to all things BTG, we’ll tell you everything you need to know about Big Time Gaming slots. We’ll break down the Megaways mechanic and also look at more recent innovations such as Megaclusters and Megaquads slots.

You’ll also discover just what are the best Big Time Gaming slots, where you plat for free and which casinos offer the best range of content. Plus much else besides.

Review by Chris Taylor

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About Big Time Gaming

Founded in 2011 Creator of Megaways mechanic
Developed Megaclusters + Megaquads Regulated by UKGC + other territories

Founded in 2011, Big Time Gaming are based in Sydney, Australia. What has catapulted them from the Antipodes to the forefront of the online gaming world is their Megaways game mechanic which has proved a smash hit with both casino operators and slots players alike.

They have partnership and licensing agreements with the likes of GTS, OpenBet & MGS so you’ll find Big Time Gaming slots at a wide variety of online casinos and slot sites. They’ve also inked deals to provide plenty of branded slots including Monopoly, Who Wants to be a Millionaire and games based on bands and songs.

Fully licensed and regulated by the blue riband UK Gambling Commission, license number 38696, and the Malta Gaming Authority, BTG also has licences with a host of regulatory bodies around the globe.

Megaways is the mechanic which has helped BTG make their name. The development team hasn’t just sat back and rested on their laurels though. Players can expect plenty of innovation from the new Big Time Gaming slots courtesy of the Megaclusters and Megaquads slots. Let’s take a closer look at just what Big Time Gaming has to offer slot players

Best Big Time Gaming Slots


BTG slots are some of the most popular game played online. Since the introduction of Megaways, you can find Big Time Gaming slots in virtually all casino and slot sites. With more than 30 slots available, they focus on quality rather than quantity.

This is why you won’t find a Big Time Gaming new slot very often. Anyway, here’s the 5 top Big Time Gaming slot games beginning with the phenomena that is Bonanza (Megaways):

Bonanza Megaways

Bonanza Megaways is a mining-themed adventure that sparked the explosion in popularity in Megaways slots. It might not dazzle visually compared to some more recent releases but the exciting gameplay more than makes up for any lack of visual flair.

A game engine that offers 6 reels and up to 117,649 ways to win, it can be played from 20p a spin on all devices. It benefits from a Reaction feature where winning symbols are replaced with new symbols for continuous wins. There are also free spins with a multiplier that increases by 1 with each ‘reaction’ win means that there’s plenty of potential for dynamite action in this medium to high variance game.

With an RTP of 96%, it offers max wins of 10,000 x your total stake per spin. An oldie it may be but Bonanza Megaways is still an extremely playable slot that has legions of fans.

White Rabbit Megaways

If you’re looking for a Megaways slot that offers plenty of bang for your buck then look no further than White Rabbit Megaways. Loosely based on Lewis Carroll’s Alice stories, this 5 reel slot offers up to 16,807 ways to win in the base game. You can spin away, on all devices of course, from just 10p per spin.

Feature highlights include a Down the Rabbit Hole Free Spins feature where the reels can expand to offer up to 248,832 Megaways. Also in play are added wilds and multiplier wilds, in the Caterpillar Wilds feature, which can treble payouts.

With max wins of 13,000 x your total stake per spin up for grabs, White Rabbit Megaways has an impressive RTP of 97.77%. That’s the best you’ll find in the Megaways catalogue and among the best you’ll find anywhere.

Who Wants to be a Millionaire Megaways

Based on the hit TV gameshow, the sound and visuals in Who Wants to be a Millionaire Megaways will be instantly familiar to fans of the popular ITV quiz. Played using a game mechanic that offers 6 reels and up to 117,649 ways to win, the game remains true to its TV source material.

Using the iconic soundtrack, the Free Spins feature lets you Ask the Audience, Phone a Friend or go 50/50 to work your way up the free spins ladder. Those free spins come with a dynamic multiplier too which increases with each ‘reaction’ win.

Highly volatile, Who Wants to Be a Millionaire Megaways offers max wins of 50,000 x your total stake from a single spin. It can be played from 20p a spin on all devices. The RTP is 96.27%.

Extra Chilli Megaways

More volatile action is on offer in the incredibly fiery Extra Chilli Megaways. This Mexican-themed slot is played on 6 reels that offer up to 117,649 ways to win. It’s playable on desktop, mobile and tablet devices from just 20p per spin. It’s the follow-up to the popular Bonanza (Megaways).

With a Reactions feature which can give you successive wins, spell out the world H.O.T. using gold letters on the reels and you’ll trigger the Free Spins feature where the action can get even spicier thanks to the unlimited win multiplier.

The gameplay here is relatively simple but it can still deliver a big payout kick with max wins of 20,000 x your total stake from a single spin. With an RTP of 96.2%, the volatility is red hot as you’d expect from a chilli-themed slot.

Cyberslot Megaclusters

BTG’s second release to use the Megaclusters mechanic, the futuristic Cyberslot Megaclusters offers plenty of excitement. Played on a 3×3 grid, on each base game spin, 1 position will be made up of 9 symbols rather than a single one. Land a winner and each symbol is replaced by 9 smaller symbols. Symbol collapses follow each winning combination.

Other highlights include roaming wilds which deliver multipliers boosts as well as a Free Spins feature where any multipliers from the triggering spin are carried over. Fully expanded, the grid can offer 321 symbols which can deliver some enormous winning clusters.

With an RTP of 96.54%, you can spin away from 20p a spin. It also offers max wins of 23,960 x your total stake on each free spin. If you want to dip your toes into the world of Megaclusters, this is a good place to start.



So just what are Megaways slots? They are games that are played using a mechanic, invented by Big Time Gaming, where the number of symbols on each reel changes randomly with each spin. These usually range from between 2 and 7 symbols. This has an impact on the number of ways you can create a winning combination (Megaways).

The most common Megaways format offers players up to 117,649 ways to win. In some slots though, the Megaways can get as high as 16 million. To create a winning combination in a Megaways slot, you’ll need to land the same symbols or wilds on 3 or more adjacent reels, starting from reel 1.

Many Megaways slots comes with extra features too. Cascading reels are central to many. After a winner is created, the successful symbols are removed from the grid and new ones drop down to replace them. These ‘reactions’ continue as long as a new winner is formed.

Other features commonly found in Megaways slots are mystery symbols. These all morph into the same matching symbol and a new payout calculation is made with the new configuration of symbols active. Many Megaways games also comes with a Free Spins feature. Successive cascades often bring an unlimited and expanding multiplier into play.

The first slot to use the Megaways game engine was Dragon Born Megaways. The mechanic exploded in popularity with the release of Bonanza (Megaways) though.

Since then, BTG has licensed the Megaways technology to a wide variety of providers including Blueprint Gaming (which currently offers the largest catalogue of Megaways slots). Industry heavyweights NetEnt and Microgaming are also among the providers who have put their own stamp on the BTG’s Megaways format. With so much potential action and an enormous number of ways to create winning combinations, it’s easy to see why these volatile slots have become such huge fan favourites.



BTG doesn’t just rely on Megaways slots. They’ve come up with a couple of new game mechanics too. The first one we’ll look at is the Megaclusters engine. On first view, Megaclusters slots look very similar to standard cluster plays games where winners are formed by landing groupings of matching symbols. These clusters usually appear adjacent to each other vertically, horizontally and sometimes diagonally. The more matching symbols in a cluster, the bigger the payout.

Things are slightly different in the likes of Cyberslot Megaclusters and Star Cluster Megaclusters though.  The action in these slots begins on a 3×3 or 4×4 grid which offer 9 or 16 Megaclusters. When a winning cluster is created, a ‘reaction’ takes place and the successful symbols are removed from the game grid. So far, so standard.

Instead of a being replaced by a single symbol that drops down, each winning symbol is instead replaced by 3 or 4 smaller symbols. More symbols mean extra ways to form a winning combination. Create a new winning cluster here and more small symbols drop down from the top of the reels. The ‘reactions’ continue until no new winner is formed.

It’s a simple formula that can deliver some potentially massive clusters, especially when you factor in bonus features like expanding multipliers, multiplier wilds and free spins.

Big Time Gaming has licensed this game technology to Relax Gaming which has run with it to create Kluster Krystals Megaclusters. This is played on a 5×5 starting grid and comes with a trio of mini modifiers including symbol upgrades, symbol removals and wild multipliers. There’s also a free spins round. Beautifully designed with hypnotic gameplay, this offers a nice twist on the standard Megaclusters format.



Another mechanic from the Big Time Gaming factory is Megaquads. We’ll use as an example, Slot Vegas Megaquads, which is the first game to use this game engine.

The base game action plays out on 4 separate 4×4 grids that each offer 256 ways to win (1,024 in total). Landing special wilds in 2 slots that are next to each other triggers the Rainbow Wild Bonus feature. These 2 sets of reels merge to create an 8 reel, 4 row machine that creates 65,536 ways to win. That makes it possible to create 8-symbol winning combinations.

Trigger the Rainbow Wild Bonus feature during the Free Spins feature and the 2 sets of 4×8 reels that each offer 4,096 ways to win merge to create a grid that offers an enormous 16,177,216 ways to win. Other highlights here include expanding multipliers and free spins.

Like most Big Time Gaming slots, the design in Slot Vegas Megaquads is simply done. The gameplay can deliver some knockout action though, which is no surprise given that the mechanic can offer a mind boggling 16 million ways to win. It’s as volatile as you’d expect, too. What you might not imagine is the very decent RTP of 96.59%.

BTG has agreed an exclusive Megaquads licensing deal with Scientific Games. The first release from the SG production line is set to be Rainbow Riches Megaquads which is due to hit online casino shelves in early 2021. If Slot Vegas Megaquads is anything to go by, it should be worth the wait.



It’s only natural due to the success of Big Time Gaming slots that they developed the Megapays mechanic. Megapays is the progressive jackpot system found in some of their slots. Basically, all Megapays slots will come with 4 progressive jackpots. They will have Mini, Midi, Major and Mega Jackpots.

Visible when you play a Megapays slot, there will be a Megapays feature which can activated on any spin. 1 symbol is chosen to become the Megapays symbol. If 1 or more instances of this symbol lands, it locks in position with another respin awarded. The more you land, the higher up the Megapays ladder you will climb.

If you land 15 or more, you’ll win the Mega Jackpot which begins at €300,000. The actual real-time Mega Jackpot is currently worth £996,434.90.

The first slot to use Megapays is Bonanza Megapays. With Bonanza (Megaways) being BTG’s most popular slot, it was an obvious choice. Since that, BTG has released Who Wants to be a Millionaire Megapays and Star Clusters Megapays.

One thing to consider is that a total of 9.44% of the RTP will go towards funding the Megapays jackpots. This will make the RTP for the slot lower than its non-Megaways version. Big Time Gaming will surely release Megapays version of many of their slots so they could end up offering some of the biggest progressive jackpots found online. Watch this space.

Other Big Time Gaming Innovations

With Big Time Gaming creating Megaways, Megaclusters and Megaquads, they also have other innovations which can be found in their slot games. They include the Reel Adventure and Heartstopper mechanics:

Reel Adventure Slots

With the release of Holy Diver Megaways, Big Time Gaming introduced the Reel Adventure mechanic. A character located at the bottom of the reels will activate various bonus features including added/random wilds, wild reels, multiplier wilds and Free Spins feature triggers.

In the Holy Diver Megaways slot, you collect gems to fill shields which lead to various levels within the main bonus feature. This can lead to bigger payouts when you play the Free Spins feature.

It’s also used in Monopoly Megaways where you have the chance to upgrade your gameplay and increase your winning potential. Landing on certain spots on the Monopoly board will reward you with the likes of maximum Megaways, more free spins, a higher win multiplier or entry to the free spins.

Heartstopper Slots

Heartstopper is a token system invented by Big Time Gaming that builds towards an enhanced mega feature. The Heartstopper mechanic was first seen in the Lil’ Devil slot. It might be best not to trigger the bonus features right away as collecting hearts will lead to an enhanced version of the features which are more rewarding and offer bigger payouts.

The other game to use it is Royal Mint Megaways which has 6 reels and 117,649 ways to win. If you collect 40 gold bars, an extra scatter is added per spin until your trigger the Heartstopper Enhanced Free Spins feature. Here, the multiplier starts at 2x and increases by 2 after every reaction/win. This can lead to 41,300 x stake wins on each free spin.

Branded Slots


Big Time Gaming has inked agreements with top names from the worlds of television, music and board games to create a selection of branded slots. These include:

  • Who Wants to be a Millionaire Megaways & Millionaire Mystery Box: these are both based on the massively popular TV gameshow.
  • Danger High Voltage: a lyric from a catchy song from the Electric Six provides the inspiration for this exciting slot that crackles with energy.
  • Monopoly Megaways: the ultimate argument inducing board game gets the Megaways slot treatment. With features aplenty, it takes the Monopoly franchise to the next level.
  • Survivor Megaways: Survivor never really made a mark with British TV viewers but proved a smash hit across the Pond. This TV adaptation offers max payouts of almost 40,000 x from a single spin.
  • Lil’ Devil: based on a song by legendary rockers The Cult, this 6 reel, 4,096 ways to win slot comes with free spins and multiplier wilds that can combine to send payouts rocketing by up to 144x.
  • The Final Countdown: the classic song by 80s Swedish poodle permers Europe provides the source material for this explosive slot. Cloning wilds, enormous multipliers and free spins can deliver some out of this world action.

Mobile Slots

All Big Time Gaming slots are created using HTML5 technology which means that they’re fully optimised for use on a variety of devices including desktop computers, tablets and smartphones. If you’re playing a Megaways slot, we’d recommend trying to play on something with a bigger screen.

The square shapes that dominate the Megaquads slots work especially well on mobiles though. Either way, all Big Time Gaming titles are available to play on iOS, Android and Windows mobile devices.

Big Time Gaming Free Play

If you want to try a Big Time Gaming slot demo, then you’re at the right place here at Here you can try a full selection of Big Time Gaming free play slots on desktop, tablet and mobile without having to shell out any of your own cash.

With the unusual game mechanic of Megaclusters and Megaquads slots, we really recommend having a play in free play mode. As well as road testing the mechanic, you’ll also be able to investigate the bonus features that each BTG slot has to offer.

As per Gambling Commission regulations, players in the UK will have to confirm their age before being able to play for free. At, we’ve use Verime’s verification process. All you need is a mobile phone. Respond to a couple of text messages and you should be good to go. There’s no need to fill in extensive forms or scan documents and, in most cases, it’s all done in a matter of minutes.

Big Time Gaming Casinos

Big Time Gaming slots are distributed by Relax Gaming and Scientific Games and are available at a huge variety of online casinos and slot sites. In fact, it would be easier to list the sites that don’t offer BTG slots than those that do.

Casinos with Big Time Gaming slots include some of the industry’s top names including LeoVegas, Paddy Power, Betfair, Rizk Casino, PlayOJO and many, many more.

The high variance and big win potential mean that you won’t often find BTG slots in online casino welcome bonuses or new player free spin packages. They do usually run promotions every 3 to 4 months which award cash and bonus prizes though.


Who are Big Time Gaming?

Founded in 2011, Big Time Gaming are a Sydney-based slots developer. They’re best known for creating the Megaways mechanic. They’re also behind the Megaclusters and Megaquads engines.

What are the best Big Time Gaming slots?

If you want to try a BTG slot, we recommend the iconic Bonanza Megaways. If you’re looking for a very high RTP rate,  then give White Rabbit Megaways a spin. For more inspiration, check out the 5 best BTG slots.

Can I play Big Time Gaming slots for free?

Yes, you can try BTG slots for free here at If you’re a UK player, complete the quick age verification procedure and you’ll be good to go in minutes.

What Big Time Gaming Megaways slots are there?

There are plenty of top Megaways slots to play. We recommend Bonanza, Extra Chilli, Who Wants to be a Millionaire and Monopoly Megaways. Check out the entire Big Time Gaming slots list.