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About the Game

Stack ‘Em is a 5×6 grid game with a maximum possible win of up to 10,000x. 

The game involves stacking symbols on top of each other to increase multipliers shown below the reels. 

In free spin mode, wins will increase the total multiplier with the size of the cluster. 

The game starts with a fixed number of spins, indicated by heart symbols above the reels. 

A question mark symbol gives a mystery reward that could be additional spins or a multiplier increase. 

Connecting an X symbol with a win multiplies the win by the factor shown above the reels.

Multipliers and Base Game

In the base game, non-winning symbols are removed after each win. 

Winning symbols are kept and dropped to the bottom of the grid. Each reel shows the number of winning stacked symbols. 

Winning clusters are multiplied by the total multiplier values they are above. 

For example, a cluster with multipliers 1x, 3x, and 2x will total 6x and multiply the winning cluster’s amount. This continues with more wins.

Freespins

Freespins are triggered by at least three scatter symbols in the base game, awarding five initial free spins. 

Spins continue as long as there are hearts above the reels. In free spins mode, the total multiplier increases with the number of winning symbols. 

Special X symbols multiply connected clusters, and a question mark symbol can grant additional spins or multipliers.

Symbol Payouts

• Symbols: A, G, E, R, T
  • 5-6: 0.20
  • 7-8: 0.40
  • 9-10: 0.80
  • 11-12: 1.20
  • 13-14: 2.00
  • 15-19: 8.00
  • 20-24: 25.00
  • 25+: 50.00
• Other Symbols:
  • 5-6: 0.50-1.00
  • 7-8: 2.00-4.00
  • 9-10: 4.00-8.00
  • 11-12: 6.00-12.00
  • 13-14: 10.00-20.00
  • 15-19: 40.00-60.00
  • 20-24: 100.00-200.00
  • 25+: 200.00-400.00

The RTP value is shown in-game.

Special Symbols

The wild symbol substitutes for all paying symbols.

Ways to Win

A winning combination is made with five or more connecting symbols of the same kind on the grid.

General Information

• Balance: Displayed in the player’s chosen currency.
• Bet: Range is between £0.20 and £5.00. Bet level is adjusted through arrows.
• Spin: Initiate a spin with the spin button or spacebar.
• Win: Winnings are calculated from the paytable, with only the highest win per combination paid.
• Max Win: Maximum possible win is 10,000x your bet. Exceeding this leads to a round end, awarding winnings immediately.

Additional Information

• Interrupted Game: Resume interrupted rounds immediately; incomplete rounds are void after one day.
• Game History: Available for completed games.
• General Terms: Misuse or malfunction voids play. RNG determines outcomes.

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Stack Em Demo Play

If you’re curious about Stack Em demo play or exploring this slot for the first time, you’ve come to the right place. While access to demo play isn’t always available, this page highlights everything you need to know, based on the official help and feature information.

Discover how the main elements of the game work, including free spins, bonus symbols, wilds, and payout structures, just as you would in a standard demo mode.

Whether you’re reviewing the gameplay mechanics before wagering real money or simply comparing Stack Em with other online slots, the detailed breakdown here offers a close simulation of how it feels to play for free.

*All values (Bet Levels, Maximum Wins etc.) mentioned in relation to this slot game are subject to change at any time. Game features mentioned may not be available in some jurisdictions.