Booster Slot Review

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The slot game Booster from iSoftBet is a space-themed game that takes inspiration from classic fruit machines. That is not something that happens very often.

There are 5 reels and 25 pay lines available and a max prize of 6,000 coins. To win this amount on Booster slots game, players will need to place a bet somewhere between 25p and £25 per spin. The game has an RTP rate of 95.6%, and there are chances for players to win some free spins.

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Theme and Graphics

The design of the Booster slot game marries science fiction themes with the play style of an old fashioned fruit machine. The games 5 reels are set against a backdrop of black sky and stars. Swathes of purple swirls across the sky to detail just how vast the emptiness of space is.

Juxtaposing this is the symbols across the reels. There are stars, but not the kind you would think, diamonds, bar signs and 7’s. The most standard set of symbols imaginable. The most lucrative of these symbols is the diamond, and it pays out 2000 coins for 5 across a pay line. 

It seems as if the gameplay and theme of Booster slot is at war with themselves. The space theme does not stretch that far, serving as more of a background than an overall theme. This is still a slot for experienced slot gamers.

iSoftBet is a developer that has tried its hand at many different slot games. If Booster slot does not capture the imagination, perhaps you might want to try one of UK’s best slot games, such as:

  • Raging Dragons
  • Queen of Wonderland Megaways
  • Greta Goes Wild
  • Western Gold

Booster Slot Bonus

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How to Play Booster Slot

Booster is a fairly simple slot that is played using the display screen at the bottom of the reels. The small white print may be hard to read; however, all of the staple boxes are to allow players to:

  1. Choose their amount of active pay lines
  2. Set their stake
  3. Spin the reels

The Booster slot game aims to match up the symbols 3, 4 or 5 times across a pay line on a spin. Manage to do so successfully, and you will win a prize.

To start a game of Booster slot, you will need to find the game in the Star Slots catalogue and hit ‘Play Now’. However, unregistered players will need to sign up by following these steps.

  • Step 1 - Hit ‘Join Now’ on the sites login screen
  • Step 2 - Provide the necessary details such as your email and chosen payment method
  • Step 3 - Verify this email and make your first deposit.

If you are in a hurry, don’t worry. All of this can be achieved in under 5 minutes.


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Slot Game Statistics

The RTP rate for Booster slot does not fall that far below the average for an online slot game in 2021. It sits at around 95.6%, where the average is 96%. This percentage details the average amount of your deposit that you will receive back throughout 1,000,000 spins. 

There are 5 reels on this slot game which makes Booster slot unique for a game trying to capture the magic of a fruit machine. These games usually contain just 3 reels and are a lot less volatile. 

To find out the volatility and other important facts about Booster check out the table down below.





Min/Max Bet


Max Win





Free Spins, Bonus Game

*All of the above values are subject to change at anytime.

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Booster Bonuses & Free Spins

The bonus features in Booster slot are a little different to what you might expect. Again, fruit machines do not traditionally have many bonus features, and so it is nice that Booster deviates away from this format in such a way. This bonus content includes:

  • Free Spins - These are earned by landing the bonus scatter symbol 3, 4 or 5 times on a spin. The most you can win on a spin is 50 free spins.
  • Bonus Game - Alternatively, the player can use these bonus scatters to participate in another bonus feature. This can be a spin the wheel type game or a max jackpot payout of 6,000 coins. It all depends on your luck.

As you can see, the bonus features aren’t much to shout about and do not use much of the slots supposed space theme, but still, they are here. That’s better than nothing.

Last Thoughts on Booster Online Slot

It seems as if the developers of the Booster slot game were in two minds. They wanted all of the excitement of a themed slot with all of the credibility of a fruit machine. However, they end up with a gentle slot game that does not offer many wins, and its theme is lacking. A black background does not count as a theme.

You may feel differently when playing the game yourself ant Star Slots; however, it seems that Booster is an underwhelming experience. This is a game that lands itself a pitiful score of 2/9.

You can also other amazing games such as Book of Gold Double Chance Slot at Star Slots. However, if you’re fond of space-themed games similar to Booster slot, we recommend the following slots below:

Booster FAQ’s

If you still want some more information on Booster, read through the frequently asked questions. Perhaps you’ll find your answers there.

How will I know the value of the symbols in Booster?

The slot games menu is accessed by hitting the question mark. This will open up the games help section, and this goes into detail about everything you need to know, from the values of the symbols to how you can bet.

Is Booster available on Mobile Phone?

Yes. Booster is playable on PC, smartphone and tablet.

Can I play Booster for free?

There are several ways to play Booster for free. You can look for a signup bonus on the Star Slots promotions page or choose the free play mode instead of the standard model on the games startup screen (Full Ts & Cs Apply). Please remember that if you play Booster for free, there are no real money prizes available. However, all the bonus content is present.


*All values (Bet Levels, Maximum Wins etc.) mentioned in relation to this slot game are subject to change at any time.