Space Stacks

Space Stacks

star-rating 4.2/5
Leanna Madden 5 Min Read

Space Stacks is a brand new online slot game by Push Gaming where we are invited to head out to outer space in search of riches and big wins.

Once again, software game developers do not fail to amaze. This new online slot game comes with a brand-new ReelBets mechanic, where the player gets the chance to split their bet between different prize blocks, max blocks and bonus round blocks. Don’t worry too much if you are not sure what we are talking about, as this will be further explained in detail within this review.

The game is built on 10 reels, out of which 7 of these reels award Instant Prizes, while the other 3 reels lead you to bonus games. You will be first asked to choose the size of your bet by clicking on the chips, just as you would in a game of Blackjack or Roulette. You must then click on the reels you wish to place your bets on.

The first six Instant Prize Block reels will kick off with bet multiplier values of 2 to 50. On the other hand, the Bonus Block reels, better known as the Astro, Flip and Apex will lead you to various features. The Max Block rewards you with an instant prize of 5,000x your bet, which is not bad at all.

In total, there are 10 symbols available in this game, four of which include the bonus blocks. The lowest paying symbols include the blue, purple and green prize blocks, which aware you a minimum payout of between 2x and 3x your stake.

The highest paying symbols, include the pink, yellow and red instant prize blocks, which aware you 5x, 10x and 50x your bet, respectively.

Keep on reading our Space Stacks review to learn more.

Short facts

  • Developer: Push Gaming
  • RTP: 96.23%
  • Volatility/Variance: Medium
  • Layout: 10 x 10
  • Paylines: Cluster Pays
  • Bonus features: Instant Prize Blocks, Astro, Flip and Apex and Enhancement feature
  • Bets: £0.10 to 100
  • Max wins (coins): 5,000x your stake

Space Stacks jackpots

There are no Space Stacks jackpots available in this online slot game. The maximum win you can achieve in this slot game is 5,000x your bet.

Space Stacks free spins

There are no Space Stacks free spins bonus rounds available in this slot game.

Space Stacks bonus features

The Space Stacks slot game comes with no less than 5 in-game bonus features. Since the game comes with the ReelBets mechanic, each time you fill a column, you will either win a prize or a feature.

Here are the various bonus features available in this online slot game:

Enhancement feature

The Enhancement feature can be applied to all Instant Prize Blocks except for the Max Block. During this feature, one or more Instant Prize Block values will be boosted to a higher value than the initial one. All the possible enhancements will also be shown in grey type.

The feature will then randomly pick one or more from the viable options. This can entail any of the below multiplier and additional values:

  • Multiplier Values: 2x, 3x, 5x, 10x, 25x, 50x and 100x
  • Additional Values: +2, +3, +5, +10, +25, +50, +100, +250, +500 and +1,000

Astro Feature

If you successfully fill up the Astro feature first, you will be whisked away to a different location, where you will be asked to spin a wheel with 32 sections. This wheel comes with different bet multipliers, instant prizes as well as a collect segment.

You can keep on spinning the wheel until you land on the collect section. When this happens, all multipliers and instant prizes will be immediately collected.

Flip Feature

As soon as you fill up the Flip column, you will activate this feature. You will immediately be moved to a different spot with a 6×6 reel setup. Your main aim here is to pick three out of the various available options. These will reward you with various instant prizes from 2x all the way up to 1,000x and rocket symbols.

Each time you find an instant prize, the number of picks is deducted by one until you run out of options. If you find a rocket symbol, then you will receive a win multiplier of 2x. If you find more rocket symbols, the number of multipliers will go up to 5x, 10x and 100x.

Apex Feature

The Apex feature will be triggered as soon as you fill up the column. You will first participate in the enhancement feature, after which symbols will start to drop into the columns just like in the base game.

If you succeed in filling a column, then you will collect your prize. When you succeed in filling up a second column, then the prize is added to the prize already collected. You have, in total, three lives. When no symbols land in the columns, you will lose one life.

Space Stacks RTP

The Space Stacks slot game comes with five different payout percentages with a default of 96.23%. Online casinos can then opt for different payout percentages, such as 95.25%, 94.29%, 90.22% or 88.47%.

This game also comes with medium volatility, which ensures that small wins will roll in regularly.


There is absolutely nothing ordinary about this online slot game, which is what makes it unique and interesting. Game developer Push Gaming has succeeded in pushing the boundaries and delivering an out-of-this-world slot game.

This slot game’s futuristic soundtrack adds to the allure and the enigmatic mystery of the game. It sounds more complicated than it actually is, but once you start playing bets on the various blocks, it will all come together.

While there are no free spins bonus rounds, there are plenty of features, including rocket multiplier boats, the spinning wheel and enhancement of multipliers. All of these can help you generate some tantalising wins.

Space Stacks is a brand new game that will keep you pinned to your seat. We just can’t wait to see what game developer Push Gaming will come up with next.

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