London Hunter Slot by Habanero

Two vertical fuel tanks flank the reels, one on the left rail and one on the right. The left one is the Wild Expand Tank. It ticks up by one notch every spin, regardless of whether the spin pays, and when it crosses 13 it triggers an Expanding Wild on the next round. The right one is the Multiplier Tank. It moves a bit faster, one notch per spin toward a fill at 11, and on the next round it adds a win multiplier to whatever the reels pay. Neither tank costs you anything to fill, and the two run in parallel, so on any given spin you can watch yourself drift toward both feature triggers at once.

That dual-tank logic is the engine. The base game is otherwise a plain 5x3 with 25 fixed lines and a fairly standard symbol set, the unusual part is that the bonuses fire on a guaranteed cadence rather than on hit-and-pray scatter math. Some quiet runs of zero wins still move the tanks. The flip side is that the maximum payout is capped at 1,200x bet, which is modest by 2024 standards but appropriate for a game that is essentially distributing free expanding Wilds and multipliers at a regular interval rather than rare big hits.

Free Spins work differently from how most slots trigger them. There is no scatter. Instead the round has to land the three storyline-specific symbols, the Hunter, the Plasma Gun, and the Dinosaur, all at the same time on the same spin. When the trio drops together, you get 10 Free Spins, and crucially the two fuel tanks fill faster during the round, so you can clock several Expanding Wild and Multiplier activations across the 10 spins instead of one or two. The Grand and Multiplier progressive jackpots ticking at the top of the screen are on a separate random trigger.

Visually the game commits to the Victorian dinosaur-hunter pitch hard. The 5x3 reel set sits inside a brass-and-copper steampunk frame ringed with pipes and gauges, faint Big Ben silhouette and industrial smokestacks in the foggy backdrop, the LONDON HUNTER title up top in heavy gilded serifs. Reel symbols are circular brass medallions: a Victorian bulldog in a bowler tie, a leather pith helmet, the gleaming plasma gun (now a Free Spins trigger), a small green T-Rex, with Q, J, A, K royals carved into etched brass plates for the lows. Steampunk dinosaur hunt is not a setting Habanero returned to often, and it shows.