Boost It is one of STHLM Gaming early releases, and it is safe to say that this slot has set the visual standards for their subsequent games. It can be described as an interesting mixture of the traditional slot machine elements and the aesthetics of Art Deco glitz and glamour.

Bringing to mind the “Jazz Age” and the “Roaring 20s”, Boost It slot is all about the ambience. As you spin the reels, the vintage décor and the upbeat speakeasy bar music will give you a taste of the golden prohibition era, when liquor was paid in diamonds. The minimum bet is $0.25, but you can go up to $100 if you're feeling particularly lucky. Still, bear in mind that STHLM Gaming slots are often leaning towards higher volatility, which makes them less suitable for players with a limited budget. There are 243 active paylines, and to generate a payout, the matching symbols must form a combination on adjacent reels, from left to right (starting with the first reel on the grid).

If you’re in a mood for more dynamic sessions (which you probably will be, thanks to the lively background music), Boost It interface enables you to increase the spinning speed by enabling the Quick Spin mode. You can also automatize the gameplay by using the Auto Play feature, thus activating up to 500 spins which can be manually stopped at any time. Should you like to revisit the last spin and take a closer look at the symbol combination, STHLM Gaming offers a unique Replay option, which can be found on the rulebook page.
The highest paying symbols are Diamond, 7, and Bar, followed by the medium value Cherries and the 4-Leaf Clover while card symbols (A, K, Q, and J) generate the lowest payouts. All icons become payable in the combination of 3 and the payout amount is determined by the bet level.

As you spin the reels, you will notice an extra sidewinder placed at the top of the grid. This is the Booster Reel which adds up to 3 mini bonuses called the Booster Features:

• Random Wilds – 1, 2, or 3 Wild will be added to reels 2 - 5
• Wild Reel – a Wild icon will expand across an entire reel 2, 3, 4 or 5
• Symbol Multiplier – multiplies the value of the symbol combination by 5
• Win Multiplier – multiplies the total payline win by 2 – 10

Although some players may be ticked off by the fact that Boost It does not have any free spins, the slot definitely does justice to its name thanks to the hefty multipliers that can be triggered on any spin. With pressed bets, the potential payout can be considerable (up to x8,100 player's bet), but one should also consider the volatility of the slot that ranges between medium and high ( which is not uncommon for STHLM Gaming releases).