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The Booster slot game from iSoftBet was released in 2017. It comes with a 5x3 grid set up that drifts endlessly through space. It is a simple mobile bill casino game that offers a max jackpot of 6,000 coins and can be played by placing bets between 25p up to £50 per spin.

The basic graphics result in more attention being put on the gameplay. There are 25 pay lines available and an interesting free spin bonus feature. In terms of data, Booster has an RTP rate of 95.6%, a percentage just below the average.

Continue reading the full review of the game below, or visit Pay by Mobile Casino to play slot games from a wide range of developers.

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Theme & Graphics

Booster does not have a specific theme. As mentioned above, the reels float through space, with stars dotting a black background. The symbols play into this minimalist aesthetic as they are comprised of classic fruit machine symbols such as stars, red and blue sevens, both double and treble bars as well as the diamond. This diamond is the most lucrative symbol and pays out 2000 coins to players that are lucky enough to match up 5 on a pay line.

In terms of graphics, Booster doesn’t reach for anything special. Again, it keeps things simple, preferring to keep the player’s focus on the gameplay rather than flashy gimmicks.

The developers behind the Booster slot are a company called iSoftBet. They are great at creating slots that can be played equally well on both desktop and mobile, Booster being a fine example of this. Other slot games in their catalogue include:

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How to Play Booster Slot Game

The Booster slot game can be found right here in the Pay By Mobile Casino slots list. It isn’t hard to find. Scroll down until you find the game that you wish to play and hit ‘Play Now’. To do this you must be registered with the site but, don’t worry, the sign-up process is super easy.

  • Click the register tab on the site's log-in page.
  • Provide your details.
  • Confirm your email address.
  • Use one of the site's payment gateways to make the first deposit of £10.

Once you have made a minimum deposit of £10 or more, you may spin the Mega Reel for a chance of Winning Up To 500 Free Spins on Starburst (Full Ts and Cs Apply)!

When finished, identify the Booster slot in the slots list or return to this page and hit ‘Play Now’. Then, follow these steps to play the slot game.

  • Once the game screen has loaded you will see the 5 reels and betting area
  • Select the number of pay lines you wish to bet on.
  • Choose the wager you want to use as your bet.
  • Spin the reels. Winning pay lines are formed from left to right and must contain 2, 3, 4, or 5 matching symbols.

In the section below, you will see all of the relevant stats about the Booster slot, but you can also try the free demo version of the slot game to see how it works.

Booster Slot Rules

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Info on this Slot

By playing the free demo version of Booster, you will become accustomed to the game’s mechanics. Alternatively, read our helpful stats section to find out how the game functions.

The RTP rate for the Booster slot game is 95.6%; based on an average of 1,000,000 spins. This means that the casino will have a house edge of 4.4%. 

 Booster has bonus symbols on its reels. Landing this may reward players with some free spins or land the player the max jackpot of 6,000 coins. To have a chance of accomplishing this, players must set a stake between 25p and £50 per spin. This wide betting range is key as it means that both new and experienced players can play with the stakes they are used to.

Find out more about Booster in the table down below.

Booster Characteristics
RTP 95.6%
Min/Max Bet 25p/£50
Max Win 6000 coins
Variance N/A
Developer iSoftBet
Bonus Features Free Spins, Instant Jackpot, Mystery Prizes

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

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Booster Free Spins & Bonus Features

All of the bonus features in the Booster slot are tied to the game's bonus symbol. To trigger these, the player must land 3, 4, or 5 of the bonus symbols on a single spin. Then, you will be taken to a board that has all of the bonus features on display. These are:

  • A mystery prize of either a series of free spins or a multiplier
  • 5 free spins with a 5x multiplier
  • 10 free spins with a 2x multiplier
  • 10 free spins with a 3x multiplier
  • 50 free spin with a 50x multiplier
  • 15 free spins
  • 100 free spins
  • The max jackpot of 6,000 coins

A light will dart between these prizes and it is the player’s job to stop the light. The player is rewarded with whatever bonus feature the light stops on.

Having all of the bonus features in Booster triggered the same way does make them hard to activate however the choice of bonuses keeps the player on their toes. Again, the Booster bonus features are another example of the simplicity of this game.

Booster Slot Gameplay

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Last Thoughts

Booster from iSoftBet is a slot game that can be enjoyed at any level. New players will enjoy the simple gameplay whereas more experienced players can enjoy the slots' retro feel. The bonus features do not trigger often but there are plenty of them, adding a touch of variety to each game of Booster.

Whether or not you have tried slot games before, Booster is a great starting point. This slot can be easily found by searching the Pay By Mobile Casino site, amongst other great games like the 1492 Uncharted Seas slot.

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