Space Stacks Slot Review
Push Gaming have built a reputation for delivering games that push beyond conventional slot design, and Space Stacks proves this philosophy with remarkable clarity. Released in October 2022, this space-themed slot introduces the Reelbets system, an innovative betting mechanic that sits somewhere between traditional slots and table game strategy. Rather than playing reels in the traditional sense, players split their stake across a 10-column grid featuring instant prize blocks, bonus round blocks, and a coveted Max block. The visual presentation matches the ambition of the mechanics—a stunning outer space aesthetic with polished animations and an exceptional soundtrack that truly elevates the gaming experience.
Base Game & Features
Space Stacks operates on a 10-column grid with 6 instant prize columns, 3 bonus feature columns, and 1 Max column. The core mechanic centres on the innovative Reelbets system, which allows players to distribute their bet between these different column types. To trigger a win on any column, you need to land 10 matching symbols filling that column vertically. This hybrid approach—combining the familiarity of slots with the strategic betting of table games—delivers a genuinely fresh gaming experience.
The Reelbets System
The Reelbets betting system represents Push Gaming’s bold departure from conventional slot mechanics. Rather than a fixed payline structure, you’re essentially playing multiple mini-games simultaneously. By splitting your wager across different columns, you control your exposure to base game wins, bonus features, or the ultimate 5,000x Max Block prize. This flexibility transforms the game from a passive spinning experience into something more interactive and tactical.
Enhancement Feature
During base gameplay, the Enhancement Feature activates randomly, boosting one or more Instant Prize values with multipliers ranging from 2x to 100x or additive values from +2 to +1,000. This mechanic adds meaningful volatility to standard spins, creating moments where consecutive small wins suddenly transform into respectable payouts. The unpredictability keeps base game sessions engaging rather than feeling like filler between bonus rounds.
Space Stacks Bonus Features
Space Stacks shines brightest in its bonus features. Rather than traditional free spins, Push Gaming have crafted three distinctly interactive bonus games, each with its own flavour and win potential. What impressed us most is how visually entertaining these features are—they genuinely feel like mini arcade games rather than simple wheel-spinning or reel-locking affairs.
Astro Feature
The Astro Feature activates when you land a win on the Astro block and presents a prize wheel with 32 segments. Each segment features a multiplier ranging from 2x to 100x or a prize value between +2 and +1,000. The wheel continues spinning until you land on the Collect segment, which ends the feature and awards your accumulated total. The mechanic creates genuine excitement—you’re never quite sure when the wheel will stop, and that uncertainty keeps engagement high throughout the feature.
Flip Feature
Land on the Flip block to unlock a 6×6 grid pick-a-prize game. You’re selecting from 36 hidden prizes ranging from 1x to 1,000x your stake, with win multipliers starting at 2x and reaching up to 100x. A clever inclusion is the Rocket symbol—when revealed, it doesn’t reduce your remaining picks, effectively giving you extra attempts to find premium prizes. This interactive element lifts the Flip Feature above simple chance, introducing a layer of strategy and engagement.
Apex Feature
The Apex Feature operates as a column-fill game similar to base gameplay, with 6 Instant Prize blocks to capture. You’re given 3 lives, and the feature ends when all lives are depleted. An Enhancement Feature activates at the start, immediately boosting your first spin with a multiplier or added value. This design choice demonstrates Push Gaming’s attention to pacing—you’re energised immediately rather than facing a slow start.
Our Honest Verdict
- Overall Verdict: 7/10
- Space Stacks represents a genuinely bold step for Push Gaming, introducing an innovative betting system that fundamentally reimagines slot mechanics. The three bonus features are excellently designed with engaging interactive elements, and the visual presentation throughout is genuinely impressive. The 96.23% RTP with medium volatility creates a balanced gameplay experience where regular smaller wins are punctuated by exciting bonus opportunities. However, accessing the higher-tier bonus features requires strategic bet placement on those specific columns, making them somewhat difficult to trigger if you’re spreading your bet across all options. This design choice isn’t a flaw so much as an intentional balance mechanism. For players seeking innovation and willing to engage with the Reelbets system thoughtfully, Space Stacks delivers genuine entertainment value. Those expecting traditional slot mechanics or seeking maximum feature frequency might find the learning curve frustrating. Push Gaming have pushed the boat out with this release, creating something genuinely different in an oversaturated market, though it’s a game that will polarise opinion rather than appeal universally.
Space Stacks FAQs
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What is the RTP of Space Stacks?
The RTP (Return to Player) of Space Stacks by Push Gaming is 96.23%. This is the default RTP for the game. Push Gaming offers alternative RTP configurations (95.25%, 94.29%, 90.22%, 88.47%) that may be available at different casino operators, but the standard RTP players encounter is 96.23%. -
What is the maximum win on Space Stacks?
The maximum win on Space Stacks is 5,000x your bet. This is achieved by filling the Max column with 10 symbols. The Max Block represents the game’s ultimate prize, though reaching it requires both strategic column selection and considerable luck. -
Does Space Stacks have free spins?
Space Stacks does not feature traditional free spins bonus rounds. Instead, the game offers three distinct bonus features: the Astro Feature (a prize wheel with 32 segments), the Flip Feature (a pick-a-prize 6×6 grid), and the Apex Feature (a column-fill game with 3 lives). These interactive bonus games replace traditional free spins entirely. -
What is the volatility of Space Stacks?
Space Stacks features medium volatility, which means winning symbols land with moderate frequency. The game balances regular smaller wins from the base game with occasional larger payouts from bonus features. This volatility level ensures consistent action without extended dry spells. -
When was Space Stacks released?
Space Stacks was released on October 26, 2022 by Push Gaming. The slot introduced the innovative Reelbets mechanic, marking the first time Push Gaming incorporated this unique betting system into their game portfolio. -
What are the special features in Space Stacks?
Space Stacks features the innovative Reelbets betting system that allows players to split their bet between instant prize blocks, bonus round blocks, and the Max block. The main bonus features include the Astro Feature (prize wheel with multipliers up to 100x), the Flip Feature (pick-a-prize grid with Rocket symbols), and the Apex Feature (column-fill with 3 lives and starting enhancement). -
Can I play Space Stacks on mobile?
Yes, Space Stacks is fully compatible with mobile devices. The game is available to play on smartphones and tablets through web browsers at multiple online casinos, offering both demo and real-money play modes. The mobile experience maintains the quality of the desktop version with optimised controls for touch screens. -
What is the Reelbets mechanic in Space Stacks?
Reelbets is an innovative betting system unique to Space Stacks that blends online slot mechanics with table game strategy. Players split their bet across different columns—6 instant prize columns, 3 bonus feature columns, and 1 Max column. You win by landing 10 matching symbols in any single column. This system was the first of its kind in Push Gaming’s portfolio and fundamentally changes how traditional slot betting works.
