Multifly! 2 Slot by Yggdrasil Gaming

The reel multipliers are the part to understand first, because they don't behave like most. Each of the five reels carries its own multiplier shown on a plaque above it, and every Wild that lands bumps the multiplier on its reel by a random amount. The unusual rule: when a win touches symbols on more than one reel, those reel multipliers are added together, not multiplied. So a x2 reel and a x4 reel feeding the same win give you x6, not x8. It changes how you read the board, since spreading multipliers across several reels matters as much as stacking one high.

The Wilds keep arriving through the Dropdown loop. Win, and the winning symbols vanish while new ones fall in, but before they refill, a glowing fly Wild gets planted on one of the winning positions. That new Wild then pumps its reel multiplier higher, which feeds the next drop. The chain runs until a Dropdown brings no win, and that's when the base-game multipliers reset to nothing. So a single decent hit can snowball into a long sequence of escalating multipliers before it dies.

Three or more scatters (a fat yellow frog) start the jungle free spins, and the headline change is that the reel multipliers stop resetting. They carry across every spin of the round, building all the way through. There's also an Upgrade version where each Wild adds bigger jumps of +2, +3 or +5 instead of the base +1/+2/+3. The buy menu spans six tiers from 40x up to 180x, the cheaper end dropping you into standard spins and the top tiers buying the upgraded round with stronger increments. Two scatters short of a trigger still pay out on their own, and more scatters mid-round retrigger.

It's a sequel to Yggdrasil's 2020 Multifly, rebuilt on the MultiMax engine. The grid sits inside carved jungle wood and hanging vines with a chameleon peering over the top, set against a misty green rainforest. High symbols are painted reptiles, a monitor lizard, crocodile, turtle and snake, while the low symbols are glowing card-suit emblems in green, red and pink. Warm gold lighting throughout.