3 Lucky Rainbows Action Boost Slot 

3 Lucky Rainbows Action Boost is an online slot game that was developed and released by SpinPlay Games in 2025. The slot game is a follow-up to the original title, 3 Lucky Rainbows, which has had a massive influence on this game and many Irish-based releases. The 3 Lucky Rainbows Action Boost release shares similar visuals to the original, aligning with the popular Irish theme and offering a range of bonus features that differentiate it from other UK online casino games in the industry. 

The gameplay of the 3 Lucky Rainbows Action Boost slot game takes place on a 5x4 playgrid that contains 20 individual paylines. The payline count seen here is around the average for online slots; however, it is considerably less than that of common Megaways slots in the industry.

The 3 Lucky Rainbows Action Boost slot is set in the depths of a forest setting, with the backdrop featuring a range of winding trees. Like many other Irish-themed slots, a hilly landscape is present, decorated with small shamrocks. Like many other Jackpot slots, 5 unique fixed prize values are located to the left of the reels, which are incorporated into a fun bonus feature we will visit later. 

There are plenty of slot games in the iGaming industry that share similar visuals to the ones seen in the 3 Lucky Rainbows Action Boost slot game. Some examples of other releases with these Irish-inspired visuals include the Rainbow Riches and the original 3 Lucky Rainbows title.

SpinPlay Games has utilised a range of base game symbols in the 3 Lucky Rainbows Action Boost slot game. The lower-value symbols can be depicted using classic playing card imagery based on those found in live casino Blackjack games. In contrast, the higher-value symbols are more thoughtfully crafted, containing a range of Irish-themed imagery.

Lower Value Symbols:

9

10

J

Q

K

A

Medium Value Symbols:

Violin

Harp

Leprechaun Shoes

Beer

Higher Value Symbols:

Shamrock

In addition to these base play symbols in the 3 Lucky Rainbows Action Boost slot game, there are also Wild symbols. The Wild symbol is thematically designed, depicting an upside-down golden leprechaun hat stashed with gold coins. 

The Wild symbol is just one of many bonus features in the 3 Lucky Rainbows Action Boost slot that gamers may encounter. The Wild symbol in itself can substitute for base game symbols to create or extend matching symbol combinations if it lands in a position to do so. 

Three uniquely coloured Coin symbols can appear on the reels in the 3 Lucky Rainbows Action Boost slot. If these Coins are landed, they will be added to the respective colour pot located above the reels. Each time a Coin symbol is landed, the Action Boost Max Free Spins feature may be triggered. Regardless of the coloured Coin symbol, if the feature is triggered, 10 free spins will be awarded.

Landing the Green Coin can randomly trigger the Green Coin Action Boost Max feature in the 3 Lucky Rainbows Action Boost slot game. In this feature, all reels will expand to 6 symbol positions high, creating a new payline count of 40. If Wild symbols land during the free spins, other positions on that reel will be nudged so that all positions on that reel contain Wild symbols. During this feature, Gold Coins can be landed, awarding various in-game rewards. The feature can be upgraded twice, with each upgrade adding Wild symbols to the reels. 

If the Red Coin is the triggering symbol in the 3 Lucky Rainbows Action Boost slot game, the Red Coin Action Boost Max feature will be active. Each Gold Coin symbol may award various in-game rewards. In this feature, collecting enough jackpot clovers can trigger one of five jackpot titles. The feature can be upgraded twice, with each upgrade reducing the jackpot clover count required for each of the jackpot titles by one. 

The Purple Coin Action Boost Max bonus mechanic can be activated if the Purple Coin triggers the feature in the 3 Lucky Rainbows Action Boost slot. The Gold Coin can be landed in this feature, awarding various in-game rewards. The feature can be upgraded twice, with each upgrade increasing the active multiplier, which starts at 2x.

If more than one coloured Coin randomly triggers its respective feature in the same spin, the bonus mechanics will be combined for the free spins rounds. 

Landing Gold Coin symbols during the base gameplay will be added to the Wishing Well feature. Each time the Gold Coins are landed, the Pick Feature may be randomly triggered. In this feature, players can pick items that can reveal various in-game rewards, as well as Terminate coins. Picking three Terminate coins will conclude the feature. 

The 3 Lucky Rainbows Action Boost title features HTML5 software, a technology commonly used in online slots in the industry. The software is popular among slot developers thanks to its ability to enable cross-compatibility in the games. 

The 3 Lucky Rainbows Action Boost slot game has a range of detailed visuals throughout play. Additionally, numerous bonus mechanics elevate the overall gameplay experience. 

Some other great titles available here include the Big Bass Bonanza and Starburst slots.

Please remember to always gamble responsibly, this is a real money gambling site.