If you think you’ve seen it all in online slots, Space Stacks is here to change your mind.
This bold release from Push Gaming flips the script on traditional gameplay with its unique ReelBets™ system—a feature that gives you full control over where to place your bets.
Whether you want to spread your wagers across multiple reels or go all in on one, the power’s in your hands.
At Roobet, we love when a game breaks boundaries—and Space Stacks does exactly that, blending strategic decision-making with serious win potential.
How to Play Space Stacks
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Rather than spinning standard reels, Space Stacks plays out across 10 vertical blocks.
At the start of each round, you choose which reels to bet on.
Once the round begins, symbols drop in randomly, and the first reel (or reels) to fill completely becomes the winning reel(s).
You only win if you placed a bet on the correct reel, making each decision feel meaningful and exciting.
The six main reels award instant cash prizes, while three Bonus Blocks open up unique feature rounds.
Reel 10? That’s the Max Block, and it’s got a monster 5,000x payout waiting.
Theme & Graphics
Space Stacks takes you on a visually slick cosmic adventure, loaded with neon-glow aesthetics and a retro-futuristic interface.
Everything from the sound design to the smooth reel animations works together to create a sharp, space-age vibe.
The game board looks like a mix between a sci-fi dashboard and a classic arcade machine, and it’s incredibly satisfying to watch the reels light up when they’re filled.
Bonus Features
There are three Bonus Blocks that can trigger special feature rounds when you’ve bet on them and they fill up:
1. Astro Bonus:
A dynamic pick-and-click style game where you choose tiles to reveal prizes or multipliers. Risk meets reward in a space-age prize hunt.
2. Flip Bonus:
Inspired by board games and coin flips, this bonus takes you through a series of coin tosses, each escalating the potential payout as long as luck is on your side.
3. Apax Bonus:
A multistage feature resembling a galactic climbing challenge. Reach higher levels by unlocking spaces with increasing rewards, with each step feeling more intense than the last.
Each bonus round has its own flair and win potential, adding massive replay value.
Bonus Buy Options
While there’s no traditional bonus buy menu, you have the power to directly bet on the bonus reels—Astro, Flip, and Apax.
This lets you focus your strategy and bankroll toward chasing those specific features, essentially creating your own version of bonus buying without needing a buy button.
Betting, RTP & Max Win
According to Roobet Space Stacks offers the following to players:
Min/Max Bet: You can stake between $0.10 and $100 per round, with flexible betting across individual reels.
RTP: The return to player sits at a respectable 96.23%, right in line with other high-quality slots.
Volatility: This is a high volatility game, so wins might not come constantly—but when they hit, they can hit big.
Max Win: Up to 5,000x your stake if you land the Max Block or crush it in one of the bonus features.
Our Favorite Casino for Space Stacks
If you want the best place to play Space Stacks, Roobet is our top recommendation. With instant signup, fast crypto deposits, and a massive library of Push Gaming titles, Roobet delivers one of the smoothest slot experiences online. You’ll also find exclusive promotions, Roobet Rewards, and 24/7 live support making it the ideal home for spinning Space Stacks with confidence and convenience
Slot Tracking Tools for Space Stacks
Before diving into Space Stacks, take advantage of our SlotEssentials tools designed to help you track, analyze, and optimize your gameplay. Use the Record Win Tracker to log your biggest hits, the Session Tracker to monitor performance, and the Bonus Hunt Tracker for high‑volatility sessions. You can also explore our Random Slot Generator, Hot & Cold Slots, and other free tools to get the most out of your time playing Space Stacks.
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