Rainbow Stacks

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Rules and Gameplay

Embark on a whimsical journey through the emerald isles with Rainbow Stacks, a slot game that encapsulates the spirit of Irish folklore. This game operates on a 5×3 reel layout and boasts 25 paylines, providing players with ample opportunities to win. Bets can range from $0.25 to $250 per spin, accommodating both casual players and high rollers alike. Rainbow Stacks is designed with medium volatility and an RTP of 96%, striking a balance between risk and reward. The gameplay is intuitive, making it suitable for both newcomers and seasoned slot enthusiasts.

Bonus Features

Rainbow Stacks is not just about spinning reels it’s a treasure trove of engaging bonus features that amplify the excitement and potential for big wins. Here’s what players can look forward to:

  • Wild Symbol: Appears on reels 2-5 and can substitute for any other symbol except the Free Spins/Jackpot Bonus Scatters.
  • Free Spins: Triggered by landing 3 Scatters on reels 2, 3, and 4, initially awarding 8 Free Spins. Additional Scatters during the feature add more Free Spins to the tally.
  • Jackpot Bonus Feature: Activate this by landing Black Pots on reels 1 and 3 simultaneously with one of 4 Jackpot Pots on the final reel. This feature offers a chance to win one of four jackpots (Mini, Maxi, Major, and Grand).
  • Buy Feature: For those who prefer direct action, the game allows players to purchase entry into the Free Spins or Jackpot Bonus Features, adding a layer of strategy to the gameplay.


The symbols in Rainbow Stacks draw heavily from Irish folklore, each meticulously designed to complement the game’s theme. Here’s a breakdown:

  • Low Paying Symbols: Classic playing card suits that offer smaller payouts.
  • High Paying Symbols: Icons of Irish luck including Leprechauns, Four-Leaf Clovers, Horseshoes, and Pipes, which promise more significant rewards.
  • Special Symbols: Wilds, Scatters, and Jackpot Bonus symbols that unlock the game’s special features and bonus rounds.


Symbol 3 Symbols 4 Symbols 5 Symbols
Leprechaun x1 x2 x4
Four-Leaf Clover x0.5 x1 x2
Horseshoe x0.3 x0.6 x1.2


Rainbow Stacks offers 25 fixed paylines, providing players with numerous ways to form winning combinations across the reels. A winning payline is created when matching symbols land on consecutive reels from left to right, starting from the first reel. This structure ensures that each spin holds the potential for multiple winning combinations, increasing the overall excitement of the game.

Pros & Cons

Pros Cons
Lush and colorful graphics that enhance the gameplay experience Lower RTP version at 94.5% can be disappointing for some players
Four jackpot prizes available, offering significant win potential Medium volatility may not appeal to those looking for higher risk and reward
Features such as Free Spins and Jackpot Bonus add depth to the gameplay Limited thematic innovation, largely sticking to classic Irish elements

Minimum and Maximum Bet

The betting range in Rainbow Stacks allows for flexibility among players, with minimum bets starting at $0.25 and maximum bets capping at $250. This wide betting range caters to both casual players and high rollers, making the game accessible to a broad audience.

Game Jackpot

The Rainbow Stacks slot offers a maximum jackpot of 2,000 times the player’s bet. Alongside this impressive potential, the game operates with a medium volatility and comes in two RTP versions – the lower at 94.5% and the higher at a solid 96%. These figures suggest a balanced gameplay experience, with decent win potentials balanced against the risk involved.

About Provider

Revolver Gaming is the creator behind Rainbow Stacks, a software provider yet to dominate the mainstream online slot gaming market but with a portfolio that’s slowly gaining attention. Known for their high-quality graphics and innovative gameplay features, Revolver Gaming is committed to enhancing the online casino experience with every release, as demonstrated in the Rainbow Stacks slot.

How To Play

  1. Start by setting your bet size within the range of $0.25 to $250 per spin.
  2. Spin the reels and aim to land combinations of symbols across the 25 paylines to win prizes.
  3. Keep an eye out for special symbols such as Wilds and Scatters to unlock the game’s bonus features.
  4. Land 3 Scatters on reels 2, 3, and 4 to trigger 8 Free Spins, with the possibility to earn more spins within the feature.
  5. For the Jackpot Bonus, aim to hit Black Pots on reels 1 and 3 along with one of 4 Jackpot Pots on the final reel to start the Jackpot Bonus Feature for a chance at one of the four jackpots.
  6. Consider using the Buy Feature to directly purchase entrance into either the Free Spins or Jackpot Bonus rounds if you’re looking for immediate action.


Revolver Gaming’s Rainbow Stacks is a testament to the software provider’s growing prowess in the online gaming scene. With its engaging Irish theme, colorful visuals, and the thrilling potential of four jackpots, it offers an immersive and rewarding experience for a wide range of players. Whether you’re drawn in by the game’s aesthetics, the chance to win big, or the allure of the bonus features, Rainbow Stacks is a slot that merits attention and playtime. As such, it stands as a noteworthy addition to the genre, further solidifying Revolver Gaming’s reputation in the industry.