The Race Slot by Big Time Gaming

The stage is pure prime-time gameshow: a glossy studio floor lit by purple and red spotlight beams, flat-screen monitors tilting in from both sides, a pixel-block backdrop, and a chrome logo wired with a red heartbeat line that pulses top-right. Paying symbols are cut gems, a purple stone on top, then red, blue and green, sitting over the card royals. The six reels run up to 117,649 ways, and there's a wrinkle to the layout: a horizontal Extra Reel slides along the right edge. Every win clears its symbols and new ones drop in from above on the main reels while fresh ones slide in from the right on that Extra Reel, and the reactions keep chaining for as long as wins keep landing.

Three or more Scatters open the Heart Bonus, and this is where the name earns itself. Before the round spins, you're handed one Heart for every Scatter that triggered it. Each Heart is a life. It drops into a Heart Counter and resets your respins back to 3, and the free spins simply keep running while a life remains. There's no fixed spin count. The round ends only once every Heart is gone. Two things build alongside the lives. The win multiplier opens at x1 and ticks up by one after each reaction, with no ceiling. And the Wilds become Duplicating Wilds, each carrying up to x5, with several Wilds stacking together on the same win. A Terminator symbol turns up in this mode only. Land it in a winning reaction and it gets pulled into the drop, then replaced by a symbol from above.

You don't have to grind Scatters to get in. Win Exchange trades a qualifying win straight for the bonus at 100x the bet, or you can buy the feature outright, with Feature Drop symbols shaving the price whenever they land. With the multiplier climbing unchecked and stacked x5 Wilds falling across a run of lives that has no built-in end, the 24,070x ceiling comes entirely out of that endless-feeling free-spins round, never the base game.