Good Luck Clusterbuster

Red Tiger built Good Luck Clusterbuster around its trademarked Clusterbuster mechanic, an Irish-themed follow-up that uses a blocky, characterful leprechaun design and an unusual, jaunty soundtrack setting it apart from similarly themed slots. The playing field is unusually large for Good Luck Clusterbuster: a 9-column, 9-row grid, framed by a small ring of stones and greenery, with a solid 3x3 block sitting inert in the middle of the base game.

Wins form as clusters — five or more matching symbols connected vertically or horizontally anywhere on the grid — and any cluster that pays clears from the board, letting the symbols above drop down to fill the space and potentially chain into further wins on the same spin. Four coloured mushrooms, in green, purple, red, and yellow, make up the low-paying end of the symbol set, while beer mugs, pipes, golden clovers, and horseshoes make up the premium end. A five-symbol cluster returns 0.1 times the stake for a mushroom or between 0.2 and 1 times the stake for one of the higher symbols, and that climbs to 2 times the stake for a mushroom cluster of 20 or more, or between 3 and 25 times the bet for a premium symbol cluster of the same size.

Four Leprechaun Wilds sit in fixed positions around the edges of the grid, substitute for any paying symbol, and — unlike regular symbols — stay in place rather than clearing when they take part in a win. The inert 3x3 block at the centre feeds the Clusterbuster mechanic itself: whenever a winning cluster lands next to it, the adjoining tiles from that block are removed, gradually opening up the middle of the grid. Clearing every outer tile from that central block triggers 5 free spins, during which the block disappears entirely and the Leprechaun Wilds start moving — each one can drift a single space in any direction once it contributes to a winning cluster, and each carries its own multiplier that increases by one every time it contributes to a winning cluster, applied to that win and stacking in turn if more than one wild is involved. Those multipliers reset once the round ends. A separate Lucky Wind Blow effect can trigger at random during free spins to nudge the wandering wilds closer together, increasing the odds they combine on the same win.

Betting on Good Luck Clusterbuster runs from 0.10 to 4 per spin, and Red Tiger rates it a full 5 out of 5 for both volatility and hit frequency, backing that up with a maximum win of 19,995 times the stake and a default RTP of 95.73%.