Cosmic Clusters! Slot Review
In this Cosmic Clusters! slot review, we look at Pragmatic Play's space-themed cluster pays slot played on a 6×6 grid. It carries an RTP of 96.45% and a maximum win of 5,000x stake. The standout mechanic is the Money Symbol: a special symbol that carries its own multiplier value, accumulates on the grid during Free Spins, and transforms non-winning symbols into more money symbols during bonus tumbles — creating a clear progression that is easy to follow as the feature develops. Cosmic Clusters! suits players who want a straightforward cluster pays mechanic with a meaningful bonus build; it is less suited to players who prefer payline slots or expect fast, high-frequency wins. Gambling Zone rates it 7.5/10: the bonus progression is clear and well-structured, though the RTP sits just below the cluster pays genre average. Find the best regulated UK sites to play Cosmic Clusters! below.
Cosmic Clusters!
Cosmic Clusters! RTP and Wagering
Cosmic Clusters! plays on a 6×6 grid using a cluster pays mechanic. Wins form when 5 or more matching symbols land anywhere on the grid in a connected cluster — there are no fixed paylines. Larger clusters award higher values, with clusters of 14 or more symbols producing the biggest single-cluster wins.
Stakes run from £0.20 to £10 per spin.
The base RTP of 96.45% is slightly below the UK industry average of approximately 96%. This is worth noting, though the gap is modest and the bonus mechanics offer the potential to compensate.
Unfortunately, a volatility score from the provider was not available. Cluster pays slot games with Money Symbol collection mechanics and Tumbling Reels typically play at medium to high volatility — sessions without a significant cluster chain will feel quiet, while a good Free Spins run with retained Money Symbols can produce meaningful returns. This is an editorial assessment.
The maximum win is 5,000x stake.
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Cosmic Clusters! Symbols and Audio and Video Design
Cosmic Clusters! delivers a bright, energetic space setting — glowing planets, stars, and cosmic debris fill the 6×6 grid, with the colour palette leaning into vibrant purples, blues, and oranges. The design is clean enough that the cluster formation mechanic reads clearly on screen, which matters when the grid fills with Money Symbols during a Free Spins run.
Paytable values are confirmed from the Pragmatic Play game server (2026-08-06). Symbol names are pending the freelancer asset package — do not guess names; insert confirmed names before publishing.
Standard symbols (Cluster Pays; minimum cluster = 5 connected symbols on 6×6 grid)
Green Gem
5-symbol cluster: 0.15x stake / 6-symbol cluster: 0.3x stake /7-symbol cluster: 0.8x stake / 8-symbol cluster: 1.2x stake / 9-symbol cluster: 2x stake / 10-symbol cluster: 3x stake / 11-symbol cluster: 4x stake 12-symbol cluster: 5x stake / 13-symbol cluster: 5.5x stake 14+ symbols: 6x stake
Pink Gem
5-symbol cluster: 0.15x stake / 6-symbol cluster: 0.3x stake / 7-symbol cluster: 0.8x stake / 8-symbol cluster: 1.2x stake / 9-symbol cluster: 2x stake / 10-symbol cluster: 3x stake / 11-symbol cluster: 4x stake / 12-symbol cluster: 5x stake / 13-symbol cluster: 5.5x stake / 14+ symbols: 6x stake
Blue Gem
5-symbol cluster: 0.15x stake / 6-symbol cluster: 0.3x stake / 7-symbol cluster: 0.8x stake / 8-symbol cluster: 1.2x stake / 9-symbol cluster: 2x stake / 10-symbol cluster: 3x stake / 11-symbol cluster: 4x stake / 12-symbol cluster: 6x stake / 13-symbol cluster: 6.5x stake / 14+ symbols: 7.5x stake
Purple Gem
5-symbol cluster: 0.3x stake / 6-symbol cluster: 0.5x stake / 7-symbol cluster: 0.9x stake / 8-symbol cluster: 1.5x stake / 9-symbol cluster: 2.4x stake / 10-symbol cluster: 3.5x stake / 11-symbol cluster: 6x stake / 12-symbol cluster: 7x stake / 13-symbol cluster: 8x stake / 14+ symbols: 9x stake
Red Gem
5-symbol cluster: 0.4x stake / 6-symbol cluster: 0.6x stake / 7-symbol cluster: 1x stake / 8-symbol cluster: 1.8x stake / 9-symbol cluster: 2.5x stake / 10-symbol cluster: 3.5x stake / 11-symbol cluster: 7x stake / 12-symbol cluster: 9x stake / 13-symbol cluster: 10x stake / 14+ symbols: 12x stake
UFO
5-symbol cluster: 0.4x stake / 6-symbol cluster: 0.6x stake / 7-symbol cluster: 1x stake / 8-symbol cluster: 1.8x stake / 9-symbol cluster: 2.5x stake / 10-symbol cluster: 3.5x stake / 11-symbol cluster: 7x stake / 12-symbol cluster: 9x stake / 13-symbol cluster: 10x stake / 14+ symbols: 12x stake
Satellite
5-symbol cluster: 0.5x stake / 6-symbol cluster: 0.8x stake / 7-symbol cluster: 1.2x stake / 8-symbol cluster: 2x stake / 9-symbol cluster: 3x stake / 10-symbol cluster: 4x stake / 11-symbol cluster: 8x stake / 12-symbol cluster: 10x stake / 13-symbol cluster: 12.5x stake / 14+ symbols: 15x stake
Green Alien
5-symbol cluster: 0.6x stake / 6-symbol cluster: 1x stake / 7-symbol cluster: 1.5x stake / 8-symbol cluster: 2.5x stake / 9-symbol cluster: 3.5x stake / 10-symbol cluster: 5x stake / 11-symbol cluster: 9x stake / 12-symbol cluster: 12x stake / 13-symbol cluster: 15x stake / 14+ symbols: 20x stake
Crystal Cluster
5-symbol cluster: 1x stake / 6-symbol cluster: 1.5x stake / 7-symbol cluster: 2.25x stake / 8-symbol cluster: 4x stake / 9-symbol cluster: 6x stake / 10-symbol cluster: 10x stake / 11-symbol cluster: 15x stake / 12-symbol cluster: 22.5x stake / 13-symbol cluster: 30x stake / 14+ symbols: 50x stake
Wild (Astronaut)
Substitutes for all symbols except the Scatter.
Scatter (Flag on Planet)
Appears on all reels. Landing 3–6 Scatter symbols triggers Free Spins.
Money Symbol
Carries a multiplier value up to 1,000x; part of winning cluster or retained on grid during Free Spins; symbols outside winning clusters transform into Money Symbols during bonus tumbles
Cosmic Clusters! Mobile Features
Cosmic Clusters! is built in HTML5 and plays in-browser across desktop, mobile, and tablet. The 6×6 grid adapts well to mobile screens, and the cluster formation animations are clearly legible in portrait orientation.
Cosmic Clusters! Bonus Features
Cosmic Clusters! has one bonus feature — Free Spins — with a Money Symbol retention mechanic that makes the feature play differently from the base game. The game's highest win potential sits within a Free Spins run where Money Symbols accumulate across the grid.
Free Spins
Landing 3-6 scatter symbols triggers Free Spins, awarding 12-21 initial spins depending on how many scatters land. During the feature, each additional scatter that lands awards 2 more spins.
Money Symbol Retention
During Free Spins, the behaviour of Money Symbols changes meaningfully compared to the base game: non-winning Money Symbols remain on the grid rather than being removed. Additionally, any symbols that are not part of a winning cluster transform into Money Symbols during bonus tumble sequences. This means the number of Money Symbols on the grid can grow progressively across a Free Spins run, concentrating the collection potential as the feature continues.
Cosmic Clusters! Final Thoughts
What I liked about this one is that the Free Spins bonus explains itself clearly as it plays out. You can see the Money Symbols building on the grid, you can see the tumbles converting non-winning symbols into more of them, and you understand why that matters for the session. That kind of visual clarity in a bonus mechanic is not always a given. The RTP of 96.45% is a small negative — it sits slightly below the 96% benchmark, which is worth knowing before you play. It is not a dealbreaker, but it is honest to mention it. For players who want a cluster pays game with a straightforward bonus build and a clean grid to follow, this is a good option. If you are already playing something similar with a higher RTP, this does not offer enough of a difference to switch.
Rating: 7.5
If you like Cosmic Clusters!, then check out these other Space Theme slot games
Cosmic Clusters! FAQ
Here are a few popular questions about this slot:
