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Space Stacks Slot - Review, Free & Demo Play

Space Stacks
Space Stacks
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Updated: 22.07.2025
Reviewed by: Joe Booth
Push Gaming has unveiled a next-generation game called Space Stacks, which was released on 26/10/2022. This gambling machine is very similar to the principle of playing roulette, but only with reels that you can bet on. Plus, this game has bonus symbols that will allow you to get special rounds with multipliers. In this review from Slotsjudge, we will tell you all the details about this unusual machine.
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In this review
  1. Slot details
  2. Theme
  3. Bonus Rounds & Free Spins
  4. Summary
  5. Where to play
General information about Space Stacks slot

General information about Space Stacks slot

Rating by Joe Booth:
7.7
User’s Rating: (based on  reviews):
7.0
Push Gaming
Write a review +25 SJ points
  • Release Date:
    26.10.2022
  • Volatility:
    Medium
  • RTP:
    94.4%
  • Multiplier:
    Yes
  • Max. win:
    5,000x
  • Bonus game:
    Yes
  • Free spins:
    No
  • Scatter Symbol:
    No
  • Wild symbol:
    No
  • Symbol Stacked:
    No
  • Jackpot Game:
    No
  • Slot lines:
    N/A
  • Slot reels:
    10
  • Layout:
    10-10
  • Stakes range (€/£/$):
    0.01 to 100
  • Slot Theme:
    Space
  • Technology:
    JS, HTML5
More infoLess info

Licensed and tested by

  • AGCO
  • Gambling Comission
  • MGA
  • ONJN

How to Play

The interesting slot machine Space Stacks by Push Gaming has 10 reels, but 7 of them are basic and 3 are bonus ones. Your task is to put a chip on the desired drum or even on everything and wait for it to fill up. Each block has its own value and even RTP. If you have played roulette, you will immediately understand what the essence of the game is. Let's run this machine:

  1. Register at the online casino and make a deposit
  2. Next, find the Space Stacks machine and activate it
  3. Then, read the rules very carefully
  4. Now, bet on one reel or all from €0.01 up to €100

Space Stacks RTP and Volatility

6.4 
In the unusual Space Stacks machine, you experience medium volatility and the highest RTP of 94.42% on the purple block.
Each block offers a different RTP, for example, on the base 6 reels, the RTP varies from 94.24% to 94.42%, on 3 bonus blocks – from 94.12% to 94.32%, and on the MAX block – 94.12%. Any of these RTP indicators are far from the average ideal set for the slot industry.

Theme

9 

A space trip to the gambling universe is planned, so charge your smartphone with energy and deposits. Space Stacks by Push Gaming features a completely new mechanic that is very similar to the rules of roulette. The player places a bet on specific reels and waits until it is full to collect the winnings.

Space Stacks by Push Gaming features 10 reels, 6 classic, 3 bonus, and 1 max payout icons. You can bet on any of them or even all of them. Winnings are credited when you fill at least 1 reel. Each block brings certain payouts, for example, color payouts from 2x to 50x, and the MAX block is worth 5,000x. There are also 3 bonus blocks in the game that trigger the game with high multipliers.

Theme
Space stacks slot paytable

Mobile Compatibility

Space stacks slot mobile
The Space Stacks slot machine is completely designed for mobile gadgets on iOS and Android so that you can play in a vertical position of the mobile gadget. The game is perfectly optimized for all gadgets and desktop devices.

About Push Gaming

Push Gaming is a company that has been producing gambling entertainment since 2010 for many reputable online casinos. All games are developed based on HTML5 so that all gamblers can play slots on mobile devices. Push Gaming is also licensed by the UK Gambling Commission and the Alderney Gambling Control Commission as a game provider. There are more than 45 games in the vendor's catalog, for example, Fire Hopper, Fat Drac, and Razor Shark.

Bonus Rounds & Free Spins

8.9 

Astro Feature

When the Astro reel is triggered, the wheel with instant prizes and 32 segments will spin. On this wheel, you can get payouts from +2 to +1,000, multipliers from 2x to 100x, and a collection segment.
Space stacks slot Astro Feature

Flip Feature

In this feature, you will get a 6x6 grid and you need to select 3 hidden blocks. In each block, you can find from 1x to 1,000x or a rocket symbol. The first rocket will drop 2x and each subsequent one will increase the overall winning multiplier. Multipliers available in this game are 2x, 5x, 10x, and 100x. It is worth noting that the rocket symbol will not reduce the number of collection attempts.

Apex Feature

This feature is a bit similar to the base game, but with different rules. In this game, you will have 6 reels with quick prizes from 2x to 20x. When you fill the entire reel, you will receive a prize that matches the block. When the second reel fills up, the winnings are multiplied by the winnings already collected. Each new winning will be multiplied by the already collected prize. When 2 columns are filled, the game activates three lives. Also, each new character will reset your life counter to the initial 3. When no characters land, one life is removed, and when all lives run out, the game ends.

Max Instant Prize Block

If you bet on the max reel and fill it up, you can get a max win of 5,000x. Please note that the RTP on this reel is 94.12%.

Space Stacks Demo Play

Yes, the mechanics of the Space Stacks game are non-standard, so first try the title in demo mode to understand the gameplay and other important details. We’ve added this mode here to save you time.

Max Win

6.5 
In the Space Stacks game, you can get a generous payout of 5,000x as a max win.
Such a win will be available to you if you place a bet on the Max reel and it fills up. Don’t miss a chance to get it – spin the reels!

Overall Rating

7.7
The space adventure game Space Stacks by Push Gaming offered us a very unusual mechanic, which is very similar to roulette in terms of the betting system. Yes, the game is non-standard and a classic gambler can be scared away by the presented blocks and the betting system. If you are used to playing slots, this option is definitely not for you, but if you are looking for something new, be sure to check it out. Now, let's talk about the good points: the game has 3 bonus reels that will launch interesting rounds where you can get generous multipliers. Plus, the game has an interesting Max reel, which will allow you to get the max win!
Hits
The 5,000x max win
Three bonus rounds
Mobile accessibility
You can bet on each reel
Misses
RTP Range per reel
May be not suitable for classic gamblers

Space Stacks Slot - FAQ

What is the potential max win in the game?

If you bet on the Max reel and it fills up, you will get a 5,000x max win.

Is it possible to play this machine without a deposit?

Yes, definitely, because the first time you may not understand the mechanics, so it's better to play the demo version.

Can I bet on only one reel?

Yes, but keep in mind that if it does not work, then you will be left without a prize.

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Joe Booth
Joe Booth
Expert in: News, Blog, Slot reviews, Payments
Joe is an expert online casino player, who knows all the tricks and tips on how to get to the most massive wins. He is also an experienced online casino games reviewer, with hundreds of written articles behind him, on all kinds of online casino games. He makes sure to play them, see how they work, and then gives his honest expert opinion about them to other players, our readers. 

2732 articles

Reviewed by Editor-in-Chief
Nikita Lukanenoks

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Overall rating

Based on 1 reviews

7/10
Sloto Toto own avatar
Sloto Toto
6 lvl Superstar
7
Winning: €10
Multiplier: x6
Push Gaming keeps releasing innovating titles that have no analogues in the industry.
Time has come for the game about space. I wouldn’t call it a slot. It’s more of a table game with chips. And it’s really not that ez to understand the game rules. Basically, you must bet on one or few outcomes and on one or a few features. And then watch which corresponding symbol will fill the board first.
Many won’t get this game. Way too unusual imo. But oh well, sometimes it’s good to try something new.
Review image 1973-0
17.11.2022
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