Space Stacks Slot Review

Published: 23/10/2025
Space Stacks Slot Review

Space Stacks is a game from Push Gaming that is similar to an online slot, though it has similarities. In our Space Stacks review, we will explain how the game works so you can decide whether it is suitable for you. It uses a 10x10 grid, is highly volatile and offers a maximum payout of 5,000x your bet. There are multiple special features that make its gameplay unpredictable.

Released: 26/10/2022
10
Our RatingPerfect
0
Player Rating0 Reviews

Space Stacks

Game Provider
Push Gaming
Themes
Space
RTP
96.23% (varies)
Paylines
Cluster Pays
Bet Amount
£0.01 to £5
Max Win
Up to 5,000x
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Space Stacks RTP and Wagering

Space Stacks - RTP and Wagering

Space Stacks uses a 10x10 grid but unlike most other online slots, it does not have paylines. During each round, each block (column) receives a random number of symbols. When you play Space Stacks, you bet on which block reaches 10 symbols first, though it is possible for two or more to do this on the same turn.

You can bet on any number and combination of blocks. There are six Instant Win Blocks with prizes ranging from 2x to 50x, along with a Max Instant Prize Block that pays 5,000x. The other three are Feature Blocks, each of which triggers a bonus feature.

Space Stacks has an RTP of 96.23%. This is an average as each of the 10 blocks has its own RTP. The slot game’s top payout is 5,000x, which you can win if you bet on the Max Instant Prize Block and it wins.

Best Casinos to Play Space Stacks

There are lots of different online casinos where you can play Space Stacks. Here is my pick of the best slot sites:

Exclusive Welcome Bonus

Spin Genie

Trusted Casino
9.3 / 10
Spin Genie Logo

New Player Offer
100% up to £100
+ 65 Spins on Book of Dead

18+. BeGambleAware.org. Automatically credited upon deposit. Cancellation can be requested. First Deposit Only. Min. deposit: £10. Max Bonus £100. WR of 30x Deposit Plus Bonus amount (Slots count 100% and any other game 10%) within 30 days. Spins Game: Book of Dead. WR 60x free spin winnings amount (only Slots count) within 30 days. Spin value: £0.10. Max bet is 10% (min £0.10) of the Bonus amount or £5 (lowest amount applies).Bonus must be claimed before using deposited funds. Bonuses do not prevent withdrawing deposit balance. First Deposit Bonus can only be claimed once every 72 hours across all Casinos. Bonus Policy applies.
Gambling Zone Exclusive

Genting Casino

Trusted Casino
9.4 / 10
Genting Casino

Get 100% up to £150
+ 50 Spins on
Big Bass Bonanza

18+. BeGambleAware.org. Automatically credited upon deposit. First Deposit Only. Min. deposit: £10. Max. Bonus £150. WR of 30x Deposit Plus Bonus amount (Slots count 100% and any other game 10%) within 30 days. Spin Game: Big Bass Bonanza. WR 60x spins winning amount (only slots count) within 30 days. Spin value: £0.10. Max bet is 10% (min £0.10) of the Bonus amount or £5 (lowest amount applies). Bonus must be claimed before using deposited funds. First Deposit/Welcome Bonus can only be claimed once every 72 hours across all Casinos. Bonus Policy applies.

21 Casino

8.0 / 10
21 Casino Logo

Get a 100% Bonus
up to £500

18+. GambleAware.org. New players only. Min deposit £10. Bonus funds are 100% up to £500. Bonus funds are separate to cash funds. There are wagering requirements to turn bonus funds into cash funds. This is 40 times the sum of your deposit plus initial bonus amount before any funds can be withdrawn. £5 bonus max bet. Bonus funds must be used within 30 days, spins within 10 days. Affordability checks apply. Terms Apply.

Space Stacks Symbols and Audio & Video Design

Space Stacks has 10 symbols, each of which can only appear on one block. Each is a different colour and includes some sort of graphic or image that ties in with the game’s space theme. The background is a shot of deep space with various planets visible, and the soundtrack is quite minimalistic, but it fits the theme well. Below are the symbols and their payouts or features.

Space Stacks - Blue Moon Symbol

Blue Moon

2x

Space Stacks - Purple Triangle Symbol

Purple Triangle

2x

Space Stacks - Green Planet Symbol

Green Planet

3x

Space Stacks - Pink X Shape Symbol

Pink X Shape

5x

Space Stacks - Orange Earth Symbol

Orange Earth

10x

Space Stacks - Red Virus Symbol

Red Virus

50x

Space Stacks - Blue Fire Asteroid Symbol

Blue Fire Asteroid

Astro Special Feature

Space Stacks - Orange Fire Asteroid Symbol

Orange Fire Asteroid

Flip Special Feature

Space Stacks - Rocket Symbol

Rocket

Apex Special Feature

Space Stacks - Multicoloured Segments Symbol

Multicoloured Segments

Max Instant Win

Space Stacks Mobile Features

Push Gaming has designed the Space Stacks game to be mobile friendly. You can play it on both smartphones and tablets, and it runs perfectly well on both mobile sites and through casino apps. The visuals and soundtrack are the same however you access the game. When playing on handheld devices, the interface’s layout may be slightly different, but you should have no problems finding everything.

Space Stacks - Mobile Base Game
Space Stacks - Mobile Win
Space Stacks - Mobile Bonus

Space Stacks Bonus Features

First, there’s the Enhancement feature. After placing your bet(s), any of the six Instant Win Blocks can have its value increase by anything from 2 to 1,000. The game’s three other features come into play whenever you bet on a winning Feature Block.

Space Stacks - Bonus Feature

  • Astro: For this, you get to spin a special prize wheel. It has 32 segments with three segment types: Multipliers, Instant Prizes and Collect. Each Multiplier segment boosts your Astro Block win, and each Instant Prize segment gives you a cash prize. When the wheel lands on Collect, the feature ends and you receive all Multiplier and Instant Prize winnings.
  • Flip: This uses a 6x6 grid and has you reveal tiles, one at a time. Each one reveals a prize worth 1x to 1,000x or a rocket. The rocket adds a 2x multiplier and each subsequent rocket increases its value (to 5x, then 10x, then 100x). The feature ends after you reveal three prizes.
  • Apex: The Apex feature works in a similar way to the base game. There are six reels that Instant Win Blocks with prize values of 2x, 3x, 5x, 7x, 10x and 20x. Random numbers of symbols populate the blocks and the Enhancement feature can boost the prize values by 2x to 20x. Fill a block to win its prize; fill a second column and the game will multiply its value by the value of the first block you won with. After filling two blocks, you have three lives. If no symbols land on a turn, you lose a life, and the feature ends when you have no lives remaining. The feature also ends if you fill all six blocks with symbols.

Space Stacks Final Thoughts

Space Stacks is a very interesting addition to Push Gaming’s collection of online casino games. Every turn, you bet on which of the blocks is the first to have 10 symbols. Six of them give payouts, one of them gives the top payout and the other three trigger special features. The game is themed well and offers an intriguing alternative to the tried-and-tested slot gameplay. It has an average RTP of 96.23%, a maximum payout of 5,000x and three special features that each work in a different way. If you fancy trying something different, Space Stacks fits the bill perfectly.

Rating: 10.0

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Space Stacks FAQ

Here are some common questions about Space Stacks and their answers.

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