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About the Booster slot

Booster is a retro casino slot set in space. The Booster online slot by iSoftBet offers a fantastic game show style bonus feature in which players can win instant cash prizes and up to 100 free spins.

Booster special features

Booster's special features are all accessed through a bonus feature grid which triggers when players land three to five bonus Scatter symbols anywhere on the slots. This grid will randomly select a prize, which can range from five free spins with a 5x multiplier all the way up to 100 free spins or an instant win of up to 6000 coins.

Booster Free Spins

Free Spins can be won from Booster's bonus feature, with a wide range of free spins options available including five free spins with a 5x multiplier, 10 free spins with a 2x multiplier, 50 free spins with a 2x multiplier, or 100 free spins. The combination of free spins you win is purely down to chance, and players should watch out for bonus symbols paying out as Scatters during the Free Spins round, paying up to 30x your total bet.

Reach for the stars in Booster

Booster combines traditional slot symbols with a contemporary design. The slot's reels are set in space, with bright stars and galaxies slowly drifting past in the background, while symbols include classic slot staples like lucky 7s, bars, and diamonds. While you spin the reels, a gentle ambient soundtrack plays, setting the outer space theme and keeping gameplay calm but intriguing - which matches the pace of this mystery feature slot perfectly.

This provider also has this to offer

- Euphoria, another simple intergalactic slot where players collect Wild multipliers up to a maximum of 27x in the base game and 243x in Free Spins.
- Disco Double, a fun party slot where the mirror ball doubles your winnings when it lands on reel three during any spin.


How to win in the base game

Booster is a paylines slot featuring 25 paylines in total, and players must line up identical symbols in groups of three to five across a payline to win. The slot's highest paying symbol is the purple diamond, which pays between 5x and 2,000x the coin value for lines of three to five symbols. Red and blue lucky 7s pay up to 500x and 200x the coin value for five symbols respectively, while lower valued symbols such as single bars pay between 5x and 25x the coin value for three to five symbols on a payline.

How to play

To play Booster, players must first set the total amount they wish to stake per spin using the coin icon in the bottom right of the slot display. This can be used to set the bet from a minimum of £0.25 per spin to a maximum of £125 per spin. Once the bet has been set, simply click to spin the reels and play.