Star Clusters Megaclusters Slot Review

Expert Rating: 5 out of 5
Review by Chris Taylor
Last update 6th October 2021
Review by Chris Taylor
Last update 6th October 2021

The Star Clusters Megaclusters slot is powered by Big Time Gaming starts off with 4 rows and 4 columns. It’s the first slot to use the Megaclusters engine. In the Free Spins feature, you will play with 8 rows and 8 columns with winning symbols splitting and reacting allowing up to 256 symbols to land. There’s a Gold Wild Multiplier which increases when the Gold Wild is part of a win. This is a highly volatile slot with possible wins of 23,960 x stake and an RTP of 96.54%. Find out more in our Star Clusters Megaclusters review.

Star Clusters Megaclusters Max Win
23,960 x bet
Big Time Gaming
Type of Slot
Cluster Pays
Stakes Range
20p to £20
Bonus Features
Yes (3)
Free Spins/Multiplier
Max Win
23,960 x

Star Clusters Megaclusters Demo

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Star Clusters Megaclusters Slot RTP, Details & Wager Limits

Reels/Paylines: 4-8 reels + Cluster Pays

Stakes Range: 20p to £20 per spin

RTP: 96.54%

Max Win: 23,960 x stake per spin

The Star Clusters Megaclusters slot begins with 4 rows and 4 columns. Using the unique Megaclusters game engine, a win is created when 5 or more matching symbols of any size land horizontally or vertically adjacent to one another.

This causes winning symbols to be replaced with 4 smaller symbols and give you more chances of winning. Each win also triggers the Reactions feature which is described in more detail above.

You can play from 20p to £20 a spin catering to all bankrolls and pockets. There is the usual Autoplay function where you can play up to 100 autospins. If you fancy, you can customise your experience by imposing loss limits and single win limits. This is not available in the UK from late October 2021.

The Star Clusters Megaclusters RTP is 96.54% which is the higher end for an online slot. Highly volatile though, you’ll get plenty of smaller wins frequently with the bigger wins coming from the Gold Wild Multiplier and in the Free Spins feature.

The max win is 23,960 x stake per free spin whilst the win potential in the base game is 14,407 x your total stake.

Theme – Audio and Design Features – clusters of gemstones

Theme: Gemstones

High Value Symbol: Purple Gemstone

Compatibility: Mobile, Tablet, Desktop

Star Clusters slot - base game

The Star Clusters Megaclusters slot is simple in terms of design. With a gemstones theme, it feels like you’re visiting the Crown Jewels in the Tower of London. Visually, there is nothing much to look at but it focuses entirely on the Megaclusters game engine. Judging by the success of the Megaways mechanic, the visuals don’t really matter.

Beginning on a yellow background, symbols include an assortment of gemstones of various shapes and colours. You’ll see yellow, purple, red, blue, green, orange and turquoise gems. The purple gemstone is the highest value symbol giving you 50 x your total stake for 25 or more.

There is a star wild symbol which replaces all symbols except the Gold Wild symbol. Here’s what each symbol pays for 12 or more landing on the grid:

Symbol Payouts
star-clusters-megaclusters-slot-turqoise-gemstone-symbolTurqoise Gemstone 12-14, 15-19, 20-24 or 25+ pays 1, 3, 4 or 10 x stake
star-clusters-megaclusters-slot-yellow-gemstone-symbolYellow Gemstone 12-14, 15-19, 20-24 or 25+ pays 1, 3, 4 or 10 x stake
star-clusters-megaclusters-slot-orange-gemstone-symbolOrange Gemstone 12-14, 15-19, 20-24 or 25+ pays 3, 5, 10 or 20 x stake
star-clusters-megaclusters-slot-green-gemstone-symbolGreen Gemstone 12-14, 15-19, 20-24 or 25+ pays 3, 5, 10 or 50 x stake
star-clusters-megaclusters-slot-blue-gemstone-symbolBlue Gemstone 12-14, 15-19, 20-24 or 25+ pays 4, 7.5, 15 or 50 x stake
star-clusters-megaclusters-slot-red-gemstone-symbolRed Gemstone 12-14, 15-19, 20-24 or 25+ pays 6.25, 10, 20 or 50 x stake
star-clusters-megaclusters-slot-purple-gemstone-symbolPurple Gemstone 12-14, 15-19, 20-24 or 25+ pays 10, 15, 50 or 50 x stake
star-clusters-megaclusters-slot-star-wild-symbolStar Wild Substitutes for all symbols except Gold Wild Multiplier
star-clusters-megaclusters-slot-gold-wild-multiplier-symbolGold Wild Multiplier Applies an increasing multiplier as long as they appear

Star Clusters Megaclusters Mobile


If you like playing on the go, you’ll be happy to learn Big Time Gaming deploys HTML5 technology for all their slots. That means there’s a Star Clusters Megaclusters mobile slot as well as a tablet version and desktop naturally. The simple visuals work in its favour on smaller smartphone screens.

Star Clusters Megaclusters Bonus features

Star Clusters Star Clusters Megaclusters uses a brand new mechanic, the Megaclusters mechanic. All about creating clusters of 5 or more symbols, reactions lead to more symbols for bigger wins. There’s also a Gold Wild Multiplier symbol which increases the multiplier each time it’s part of a win. In the Free Spins feature, you play on an 8×8 grid where up to 256 symbols can land for even bigger wins. There’s a total of 3 bonus features.

Reactions feature

Like with Big Time Gaming’s Megaways slots, there’s a Reactions feature. When you get a winning combination, each winning symbol will split to be replaced by 4 smaller symbols, giving you another chance to form a winning combination.

When you win with these smaller symbols, symbols of the same size above them collapse downwards allowing for new symbols to drop in from the top of the screen. This continues until no more new wins are formed.

Gold Wild Multiplier feature


There is a Gold Wild Multiplier symbol which is a multi-coloured star and begins with a 1x multiplier. When 1 or more Gold Wilds substitute in a win, the Gold Wild Multiplier feature is triggered. The multiplier value increases by 1. This multiplier will continue to increase as long as you get wins with the Gold Wilds.

The Gold Wild Multiplier resets at the end of each spin unless the Free Spins feature is activated. Up to 2 Gold Wilds can appear on any spin/reaction.

Free Spins feature

Star Clusters slot - Free Spins feature

When you get 5 or more reactions in the base game, you will trigger the Free Spins feature. 2 free spins are awarded plus 1 extra free spin for each reaction beyond the 5th. If you were to get 8 reactions, you’d begin with 5 free spins for example.

If you had a Gold Wild Multiplier in the base game, it is carried over to the Free Spins feature. Every time the Gold Wild Multiplier reaches a multiplier of 10 (i.e. 10x, 20x, 30x etc), you will be rewarded with 2 additional free spins.

You will play on a reel set which has 8 rows and 8 columns rather than the 4×4 setup in the base game. As a result, winning symbols split and react allowing for up to 256 symbols to occur. Here’s how it works:

  • 8 rows x 8 columns = 56 symbols
  • Each symbol splits into 4: 64 x 4 = 256

Star Clusters Megaclusters Review Summary – BTG delivers with new Megaclusters mechanic

Theme & Symbols

Sounds & Music

Bonus Features

RTP (96.54%)

Max Win (23,960 x)


Big Time Gaming has been leading the way in terms of innovation when it comes to online slots. The Megaclusters engine is another example of how they push the boundaries and offer something new and innovative to slot players. The Star Clusters Megaclusters slot is simple and will remind you of Starburst visually.

BTG has taken the Cluster Pays mechanic and adds splits and reactions to it to create more potential ways to win and up to 256 symbol clusters. Being high variance and with a high RTP of 96.54%, it also has the payouts to match as you can win up to 14,407 x stake on base game spins and 23,960 x stake on a free spin.

Star Clusters Megaclusters will surely become another cult favourite amongst slot fans. Thumbs up to Big Time Gaming once again. Since it’s launch, BTG has released Cyberslot Megaclusters and Relax Gaming has Kluster Krystals Megaclusters.

  • First slot to use Megaclusters engine
  • Gold Wild Multipliers can lead to huge wins
  • Simple yet engaging
  • Graphics could be a little sharper

Star Clusters Megaclusters FAQs

What is the Star Clusters Megaclusters RTP?

The Star Clusters Megaclusters RTP rate is 96.54%. Higher than most slot games, the variance is medium to high with the bigger wins coming from the Gold Wild Multipliers.

What is the Star Clusters Megaclusters max win?

The max win from a Star Clusters slot is 23,960 x your total stake. This can be achieved in the free spins as you can form 256 symbol cluster wins. In the base game, the max win is 14,407 x stake.

How does Megaclusters work?

When you form a winning cluster of 5 or more matching symbols, the winning symbols split with 4 smaller symbols taking the place of 1 symbol. This increases the number of ways to win by 4. In the Free Spins feature, you play on an 8×8 grid with 64 symbols potentially becoming 256 symbols for 256 symbol clusters.

Are there any Star Clusters Megaclusters free spins?

Yes, the Free Spins feature sees you play on an 8×8 grid with 256 cluster wins possible. When the Gold Wild Multiplier reaches a multiplier of 10, you get extra free spins.

How does the Gold Wild Multiplier feature work?

When a Gold Wild Multiplier is part of a win, the Gold Wild Multiplier feature is activated. Beginning at 1x, the multiplier increases by as long as you get Gold Wild Multiplier wins. Up to 2 Gold Wilds can appear on each spin.

Is there a Star Clusters Megaclusters demo?

Yes, you can play the Star Clusters Megaclusters free play version here at You can try it on desktop, mobile and tablet devices.