Booster iSoftBet Slot Review

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Overall impression

Graphics - 90%
Gameplay - 90%
Bonuses - 90%
Value - 90%
Game Information
Game Type:Video slot
Progressive: No
Whats hot: Whats not so hot:
Loads of bonus games triggered by 3 bonus symbolsBonus game not triggered easy
Medium to high varianceAt higher bet levels volatility increases
Playable on mobile phones and PCs for free or for real cash
Different coin bet options and customization features

Where to play?

iSoftBet is known for developing video slots with impeccable visuals in tandem with a slew of bonus rounds. Booster a 25 payline, 5 reel non-progressive jackpot slots pays up to 6,000 coins. I find it to be of medium variance with below par base game wins but the big cash prizes are won during the bonus games. This is a medium high volatility online slot with an RTP of 95.6%.

Bets can be made from 25 pence per spin up to £/€25. Keep in mind the volatility increases when you increase your average stake per spin. The visual side of the slots is adequate, against the backdrop of the reels you’ll see space dotted with stars. The game offers free spins bonus rounds of varying degrees along with multiplier combinations that range from 1x to 5x.

Paying symbols that appear on the reels are yellow stars, diamond, blue and red 7s, single, double and treble bars, pink diamond and the Bonus symbol. The symbol that pays the top cash prize of 2,000 coins for 5 on an active line is the pink diamond. While 3, 4 or 5 Bonus symbols triggers the bonus game.  You can find this game at our best iSoftbet casinos.

booster slot


Game Play

If you intend on playing Booster for a long session use the Auto Play feature, it spins the reels automatically for you up to 100 times. Responsible gaming tools such as session and loss limits have been built into the game which is great.

I played the game in the free mode with £900 odd at my disposal. I started spinning the reels with an average stake per spin of £5 (0.20 coin range) which I increased to 12.50 (0.50). What I noted was that base game wins are not that good think my biggest win was £40 for 5 of a kind yellow star sybols.


Bonus Modes

Free Spins

The bonus game is played when 3, 4 or 5 bonus symbols appear any position on the reels. A new screen opens up which prompts you to click on the ‘Start’ button. You’ll see a screen that offers you different prizes that includes free spins with multipliers, the game randomly picks a bonus game for you.

I find that at an average stake per spin of £5 the bonus game is triggered relatively easy (40 to 50 spins). When I increased my average stake to £12 I failed to trigger it even after 190 spins. At the end of the day the symbol you should be chasing is the bonus symbol.

The rewards are awarded like this: 

  • An instant win of 6,000 coins
  • 5 free spins with 5x multiplier wins
  • 35 free spins with multiplier wins of 1x
  • 100 free spins
  • 50 free spins where all wins are doubled (2x multipliers)
  • A Mystery prize (?)

Booster exudes simplicity both in the manner in which its game mechanic operates and its visual side. The slots is pretty basic where loads of free spins with multipliers, a mystery prize and normal free spins can be won. I triggered the free spins mode twice. The first time I won a mystery prize of 50 coins and the second time I won 35 free spins with 1x multiplier wins and a cash prize of £150.



iSoftBet’s Booster video slot really didn’t float my boat because it’s crazy volatile the moment bets go above £5 per spin. Keep below this and you’ll be okay unless you’re a serious high roller with cash to burn. Then again there are way better games that offers you a much better return.

When I triggered the bonus game I bit down on my teeth hoping to hit a decent bonus game. Truth be told I prefer a straightforward free spins feature where I know what I get. The game picks a bonus game randomly for you where you could win fat cash or you could walk away with very little to show. Will I play it for real cash nope. I prefer Beetle Juice which has a lot more to offer (

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