Bill & Coin 2: Mummy Mischief Slot by Relax Gaming

Bill is a green Egyptian-style cartoon character clutching a goofy expression on the left side of the reels. Coin is the sentient yellow gold coin standing on the right. Behind them, the Giza pyramids and a partially-buried Sphinx sit in the desert distance. The setup is the second entry in the series after the original zombie-themed Bill & Coin, and the mummy framing leans hard into Indiana Jones cartoon territory rather than horror.

The math runs on tumble wins. A winning combination clears the contributing symbols, fresh ones drop in from above, and a multiplier ladder ticks up with every successive cascade. That ladder persists through the chain of tumbles within a single round, and it's the main reason a slow base game can suddenly snowball into a real number. Above the reels there's an Upgrade Spins indicator on the top-left tracking progress toward the bonus.

Free Spins lift one mechanic from the Book of Ra playbook: a single symbol gets randomly chosen at the start of the bonus and treated as the expanding symbol for the whole round. Land enough of them on a spin and the chosen symbol expands to fill its entire reel, paying as if every visible position counted. The Mummy Mischief feature on top of that is what makes the sequel different from a straight reskin - the wrapped mummy figure can transform reel positions or wreck them outright, and a 3D dice roll feeds randomised prize values into the mix during certain triggers. Two purchase options sit at 100x bet for the standard Free Spins entry and 500x for the upgraded Super variant where Mummy Mischief runs harder. Enhanced Bet at the higher cost increases trigger frequency without buying outright. Cap is 15,000x per round.