Weird Science Slot by Habanero

This is a 2013 release, and the design shows it. No Buy Feature, no Super Bet, no ante toggle, no Megaways adaptation that came later. Just 25 fixed paylines paying left-to-right, a wild that triples whatever combo it joins, a scatter that opens free games, and an old-school Gamble card flip after every base-game win. The base symbol set leans into the lab-comedy theme: a frog in a beaker, a mouse on a hamster wheel, a purple octopus reaching out of a teacup, a jar of toxic goo with a skull-and-crossbones, and a magnifying glass over scribbled notebook paper for the reels' background.

The Mad Scientist is the wild and substitutes for everything except the scatter. Any combo he completes pays triple, which stacks with the free-games trebler. Three free spins are awarded per scatter symbol in the trigger (so four scatters give 12 free games, five give 15), and during those spins every line win is multiplied by 3 again. A wild-assisted combo in free games therefore hits at 9x its paytable value. Expect long base-game gaps punctuated by sharp free-games spikes.

Two random progressives sit above the reels: a Grand and a Minor. Both are time-triggered rather than symbol-triggered, so they can hit on any paid spin with no warning. The Grand bar sat at €9,225 in the demo, the Minor at €87. There's also the Gamble button after each base-game win, flip a card to double or quadruple the payout, lose and the win is gone. The whole presentation sits inside a cartoon laboratory full of bubbling beakers, Jacob's-ladder sparks, and chartreuse glassware filled with violet chemicals, with the wordmark in a bolted GillSans-style font that fits the comedy-leaning register. For a random-progressive Habanero from this era, the math leans on that triple-into-triple multiplier interaction more than on any single big paytable hit.