Opal Fruits Slot by Big Time Gaming

The name is a wink at British shoppers of a certain age. Opal Fruits was the UK sweet that got rebranded Starburst years back, and the game leans hard into that candy nostalgia. Paying symbols are chunky fruit gems, a bunch of purple grapes up top, then a red watermelon slice, a blue plum and a green pear, each one polished like a boiled sweet. They sit inside a rounded, iridescent opal shell that borders the reels, floating on a deep purple starfield nebula flecked with stars. Bright and glossy, unmistakably 1980s.

Underneath the retro gloss is Triple Reaction, the studio's own take on cascading reels, and this is the game where it debuted. The board runs six reels in a 3-5-5-5-5-3 shape for 5,625 ways, and a win never refills from a single direction. Winning symbols clear, fresh ones drop from above on the main reels, a top Extra Reel slides symbols in from the left and a bottom Extra Reel slides them in from the right, both wrapping reels 2 through 5. So one win can keep chaining across all three feeds at once. That triple feed is the signature, and no, it isn't Megaways.

In the base game the Wilds all carry a fixed x3, and any win containing one gets tripled. Land several and the maths splits two ways: x3 Wilds on different columns multiply each other, while two in the same column add together. The game treats "spread across the reels" and "stacked in a line" as different things and pays them accordingly.

Free spins arrive by spelling F-R-E-E with Scatter letters, and the round drops those x3 Wilds for a multiplier with no ceiling. It opens at x1 and climbs by one after every reaction, forever. An extra Scatter on the trigger starts it at x5 instead, each further Scatter adding another x10 to that opening figure. Every time the multiplier crosses a multiple of ten, five more spins get tacked on, and the round retriggers, so a hot run of reactions quietly stretches itself. You can buy straight in too, with Feature Drop symbols shaving the price and a bought round occasionally rolling an enhanced version. The 36,600x ceiling lives entirely in that unlimited multiplier, fed cascade after cascade.