Space Stacks
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...
Reviewed by A. Lynch
·
Updated: 2026-04-15
| Provider | Push Gaming |
| RTP | 96.23% (varies) |
| Reels | 6 × 10 |
| Paylines | Cluster Pays |
| Max Win | Up to 5,000x |
| Bet Range | £0.01 – £5 |
| Themes | space |
| Released | 2022-10-26 |
| Technology | HTML5 |
| Updated | 2026-04-15 |
- RTP: 96.23% (varies)
- Max Win: Up to 5,000x
- Provider: Push Gaming
- Reels: 6 × 10
- Best Casino: SpinGenie (9.30/10)
Where to Play Space Stacks
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.
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.
Blue Moon
2x
Purple Triangle
2x
Green Planet
3x
Pink X Shape
5x
Orange Earth
10x
Red Virus
50x
Blue Fire Asteroid
Astro Special Feature
Orange Fire Asteroid
Flip Special Feature
Rocket
Apex Special Feature
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 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.
- 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