Frogs & Bugs Slot by Pragmatic Play

Winning symbols stay. Everything else goes. That's the reverse of how most tumble games work, and it changes the rhythm of cascade chains completely. When a combination hits, those symbols lock into the grid and drop to the lowest available positions on their reels. The rest gets cleared, new symbols fill in from above, and the game checks for wins again using the locked pieces as anchors. Chains build on confirmed hits rather than clearing space for fresh ones. It means short chains die fast - one win, a bad refill, done - but when a premium frog locks early and keeps connecting through subsequent tumbles, the stacking effect compounds.

Free spins cost 100x through the buy option and trigger naturally from four Scatters landing on reels 2 through 5 (the outer reels don't carry them). Eight spins, no retrigger. The grid grows from its base size to 6x5, but both extra rows start locked. One position unlocks randomly each spin, so the first few rounds play on a canvas barely larger than the base game. By spin 5 or 6 the expanding grid starts mattering, and the ways to win scale from 729 up toward 6,400 as positions open. The back-loaded design means spins 7 and 8 carry almost all the bonus potential.

It's a reskin of Tropical Tiki with the same math model underneath. Cartoon frogs replace tiki masks, a bug in a monocle and top hat plays mascot, and the pond setting swaps out the tropical backdrop. The top-paying frog returns 50 coins on a six-of-a-kind, which is thin for a high-volatility ways game, and the 3,000x cap cuts into what the expanding grid and reverse tumble could otherwise produce during those final loaded spins.