Dr Jekyll Goes Wild Slot by Light & Wonder

Most free spins rounds hand you a fixed number and count down. This one can stop counting entirely. Three to five Dr Jekyll portraits open the Jekyll Free Spins, 10, 15 or 20 spins that retrigger, and that's the calm version. The moment a Jekyll wild touches reel 1 during those spins, the round flips into Hyde Spins, and Hyde Spins are unlimited. A Hyde Wild locks in place and stays put, a persistent wild that rides along while the reels keep turning with no spin counter at all. The only thing that can end the run is a Sand Timer hourglass dropping on reel 5. It spins to decide your fate: keep the Hyde Spins going, or revert to ordinary Jekyll Spins. When Hyde finally relents, whatever Jekyll spins you had left play out as normal. So a tame 10-spin trigger can balloon into a long, locked-wild Hyde stretch and then quietly hand you back your last few base spins.

The green Jekyll portrait is also the base-game wild, substituting for everything but the bonus symbols. Outside the bonus there's Big Bet, a separate higher-stake mode bought as five linked spins. Each block builds a Dr Jekyll Trail, and the tier you buy decides how far it can climb, from standard up through Super, Mega and Ultra. Jekyll symbols in view push you along the trail, and where you finish, combined with which tier you paid for, hands out up to 75 free spins. That mode runs at the warmest math the game offers.

The setting is a foggy London street after dark, gas lamps glowing amber against deep blues and greens, brick townhouses and a neon-piped pharmacy front behind the reels. A bubbling test-tube rack, a lit lantern, and Big Ben under a full moon sit among the high symbols, with royals trailing wisps of green vapour beneath them. It's proper gothic horror atmosphere, eerie rather than gory, and it suits a game whose whole identity is one symbol turning the bonus into something that won't end on schedule.