Solar Nova

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  • Cluster pays system
  • Top win is very generous
  • Lots of bonus features
  • Small betting range

Solar Nova is an online slot developed by Irondog. It has nine reels, a cluster pays system, an RTP of 96 per cent, and medium to high variance. The theme is inspired by space, with features including wild symbols, tumble wins, rocket wilds, free spins, and a bonus buy.

Solar Nova review: introduction 

Solar Nova is a game from Irondog that gives players the chance to explore outer space and win up to 10,000x their total bet. Use the cluster pay system on the 9x9 grid and experience higher wins with a range of bonus features to make the gameplay more fun. Find out more about what Solar Nova has to offer in our in-depth review below. 

Overall theme 

This Irondog free online slots game has a space theme. The background features a big pink planet and the symbols are a range of gems. Behind the reels are space rocks that float around as you play. You can play a similarly themed game in the form of the Starburst slot

Solar Nova

Solar Nova RTP and variance

Irondog tends to follow the industry standard RTP for its slots and Solar Nova is no different, sitting at exactly 96 per cent. The variance is medium to high, which indicates that the prizes will be less frequent but there is the potential for them to be for larger amounts. 

How to play Solar Nova 

If you would like to explore outer space in Solar Nova, you can find out how to use the controls in our guide below: 

  1. Start by setting your bets using the stack of coins. This will open the betting menu, where you can change your bet value in accordance with your budget. 
  2. The large spin button will spin the reels once at the bet amount you choose. 
  3. The trophy symbol will display the paytable. 
  4. The small plus symbol next to the spin button will display the autoplay menu. This is where you can set the reels spinning on their own with certain limits. 
  5. Use the square button above the spin button to display the menu. This is where you can view the information and paytable for the slot. 

Always play slots responsibly and never bet more than you can afford to lose. If the game stops being fun, it is time to walk away.

Bet sizes & paytable wins

The betting range in Solar Nova goes from a minimum of 0.10 coins to a maximum of 50 coins per spin. This slot has with a cluster pay system, which means you can land matching symbols either horizontally or vertically on the reels in clusters of six or more. Below are the maximum multipliers available for landing 25+ of each symbol group: 

  • Blue gem = 100x multiplier 
  • Turquoise gem = 200x multiplier 
  • Green gem = 300x multiplier 
  • Orange gem = 360x multiplier 
  • Light pink gem = 400x multiplier 
  • Dark pink gem = 500x multiplier 
  • Diamond = 800x multiplier 

Solar Nova bonus features


Whenever you land a winning cluster, the tumble feature is triggered. All winning symbols are removed from the grid and new symbols fall into their place. The new symbols can form another cluster win and the process will continue until no new wins are made. 

Solar flare 

On any spin that is a loss in the base game, the solar wild symbol can randomly transform symbols in the same row or column into a matching symbol. In the free spins round, this feature can trigger on both winning and losing spins. The solar wild comes with a counter. If this is used in eight tumbles, the feature will be triggered with a 3x3 size.

Rocket wilds 

The rocket symbol represents the wild for the game. When the rocket wild forms part of a combination, it will not be removed with the tumble feature; instead, it will move to a random adjacent position before new symbols are added. Every rocket wild comes with a multiplier that goes up by one whenever it is part of a winning cluster. There is no limit to how high this can reach. Up to four rockets can appear on the reels at the same time. 


At any point during the game, there is the chance that the symbol teleportation feature can trigger. When teleportation occurs, the rocket wilds will switch places with one of the normal paying symbols to increase your chances of winning. 

Free spins 

This is a slot with free spins that can be triggered by landing three or more rocket wild symbols in the base game. This will give you six free spins. The wilds will stay on the reels until the feature ends, moving position on every spin. 

Bonus buy 

You can buy free spins at any point during the game. Paying 90x your bet gives you free spins with three rockets and a 1x multiplier. Paying 250x your bet gives you four wilds to start with, and 300x your bet gets rocket wilds with 5x multipliers. 

Solar Nova: our verdict 

Solar Nova is a different take on an online slot due to the cluster pay system. With the free spins and wild multipliers, this keeps the gameplay exciting. 

Disclaimer: Solar Nova trademark / license is owned by irondog. This site is not endorsed by irondog.

* This button takes you to an external third-party partner real money casino website. Although we try and match games with Casinos that have them, we advise that you double-check the slot content on the casino website before making a deposit or signing up.

Slot Data
Slot Name: Solar Nova
Software: irondog
RTP: 96%
Volatility: High volatility
Paylines: 9
Reels: 9
Min Bet (all lines covered): £0.10 (GBP)
Max Bet: £50 (GBP)
Top Win: 10000
Features: Wild Symbol, Scatter Symbol, Multiplier, Free Spins, Clusters, High volatility, Cascading
UK Available in GB? Yes. irondog have a UKGC license and are allowed to offer their games at UK licensed casinos.


What happens if more than one rocket wild is present in a win?

If this occurs, the multiplier values will be multiplied together before they are applied to your total bet. This can result in some decent wins.

What is the top prize from Solar Nova?

The most you can win is 10,000x your total bet on one spin. The highest-paying symbol is the diamond, which has an 800x multiplier if you land at least 25.

When is the tumble feature triggered?

The tumble feature is triggered when you form a winning cluster. New symbols will replace the ones that were part of the winning combination.

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