Space Stacks

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Rules and Gameplay

Space Stacks by Push Gaming introduces an innovative twist to the conventional slot machine format with its ReelBets™ system, allowing players unparalleled freedom in betting strategy. The game is set across 10 reels, where players can choose to bet on any number of these reels, including instant prize reels and bonus reels. The first six reels offer instant prizes, with the 10th reel, known as the Max Block, providing a substantial 5,000x your stake. Gameplay begins with players selecting their stakes for each reel, offering a dynamic approach to winning based on strategic choices rather than traditional paylines.

Bonus Features

Space Stacks packs a punch with its array of bonus features, designed to enhance gameplay and boost winning potential:

  • Astro Feature: Activated when the Astro bonus reel is filled, launching an Instant Prize Wheel with prizes ranging from +2 to +1,000 and multipliers between x2 to x100.
  • Flip Feature: A pick game on a 6×6 board, offering 3 picks to reveal prizes up to 1,000x your stake, with Rocket symbols increasing multipliers up to x100.
  • Apex Feature: Similar to the base game but with enhanced prize reels and a life system that ends the feature when no symbols land, potentially multiplying wins based on the feature block bet.

These features, alongside the Enhancement Feature that upgrades instant prizes and multipliers, ensure a thrilling and unpredictable gaming experience.


The symbols in Space Stacks play a pivotal role in the game’s mechanics, particularly in activating its unique features:

  • Instant Prize Symbols: Found on the first 6 reels, these symbols can award 2x to 50x your stake.
  • Bonus Symbols: The Astro, Flip, and Apex symbols trigger their respective bonus features, offering a variety of ways to win big.
  • Blocker Tiles: Removed as symbols drop, allowing for the potential filling of reels and triggering of payouts or features.

These symbols, along with the dynamic gameplay, create a rich and engaging slot experience.


The payout structure in Space Stacks is designed to reward players with a wide range of winning possibilities:

Feature Instant Prize Multiplier Range
Base Reels (1-6) 2x to 50x N/A
Max Block (Reel 10) 5,000x N/A
Astro Feature +2 to +1,000 x2 to x100
Flip Feature 1x to 1,000x x2 to x100

This innovative payout mechanism, combined with the game’s bonus features, ensures a diverse and exciting gaming experience with each spin.


Space Stacks moves away from traditional paylines, instead utilizing a unique betting system that allows players to wager on individual reels for instant prizes or to trigger bonus features. This approach provides players with a strategic depth not found in typical slot games, making each session unique.

Pros & Cons

Pros Cons
Innovative ReelBets™ system allows for strategic betting. May be complex for traditional slot players.
Unique bonus features with high payout potential. Learning curve to understand all game mechanics.
Engaging theme and high-quality graphics. Success and appeal may vary among players.

Minimum and Maximum Bet

The minimum bet in Space Stacks starts at $0.01, allowing players of all budgets to enjoy the game. The maximum bet can go up to $100, catering to high rollers looking for big wins. This wide betting range makes the game accessible and enjoyable for everyone.

Game Jackpot

The game’s jackpot is set at a maximum win of 5,000x the player’s stake. Space Stacks features a medium variance, which strikes a balance between the frequency and amount of wins. The Return to Player (RTP) can vary depending on the jurisdiction, offering 96.23% or 94.29%, providing players with a fair chance of winning.

About Provider

Push Gaming is renowned for pushing the boundaries of traditional slot games, focusing on innovative and engaging gameplay. Since its inception, the provider has developed a reputation for high-quality graphics and unique game mechanics, making it a standout developer in the online casino industry.

How To Play

  1. Choose your bet size by selecting the stake for each reel. You can bet on as many reels as you desire, including the instant prize reels and bonus reels.
  2. Once the bet is set, press the spin button to start the game round. The reels will begin to fill with symbols and blocker tiles.
  3. If you bet on reels that become filled with symbols, you win the prize associated with that reel. The first 6 reels offer instant prizes, while the 10th reel provides a significant instant prize.
  4. To trigger the bonus features, place bets on the Astro, Flip, and Apex reels. Filling these reels activates their respective bonus games, offering chances for larger wins.
  5. Continue playing by adjusting your bets as desired and exploring the various strategies the game offers through its ReelBets™ system and bonus features.


Space Stacks by Push Gaming is a groundbreaking slot game that offers an innovative twist to traditional slots with its ReelBets™ system and unique bonus features. The game’s engaging theme, coupled with high-quality graphics and the potential for significant payouts, makes it an attractive option for players seeking a fresh and exciting gaming experience. While it may present a learning curve for some, the strategic depth and innovative gameplay are sure to attract those looking for more than just the traditional slot experience. Space Stacks stands as a testament to Push Gaming’s commitment to innovation in the online gaming industry.