Voltage Vortex Slot by Genii

Wilds only land on reel 3. That single restriction shapes every spin in Voltage Vortex, because the centre column is the one place where a substitution can show up, and there are two different wilds competing for that slot. The standard one drops in, expands to fill all three positions on reel 3, then locks for one free re-spin while the other four reels roll fresh. The premium variant, labelled Wild Triple High, behaves the same way with one important addition: every win during that re-spin is doubled. Same trigger condition, same sticky behaviour, twice the payout on the back end.

The bonus is a Hold and Spin variant called Multipot Super Spins. Three or more Feature scatters trigger it, and the round starts with three respins. Every prize that lands on the grid resets the counter back to three, so a steady drip of small values can stretch the round out indefinitely. The four jackpot tiers shown across the top of the cabinet (Mega, Major, Minor, Mini, paying 1,000x, 200x, 50x and 25x at the default $4 bet) drop into the prize pool during this round, not the base game. There is no buy option, no ante, no shortcut. The scatter trigger is the only way in.

Worth flagging: the standard line paytable caps at 6,625 coins, which works out to roughly 83x your stake. The Mega at 1,000x is the actual ceiling, and it lives entirely inside the bonus. Base spins on their own will not get you there.

Visually, the cabinet is set inside a Tesla-style industrial laboratory. Copper steam pipes run floor to ceiling on either side of the reels, capped with cyan-glowing power conduits and rounded glass diodes. The reel border itself is a neon-outlined rectangle in pale blue, with the four-tier jackpot strip embedded along the top. Symbols include a green-glowing Tesla coil cylinder at the top of the paytable, a magenta-pink turbine, a yellow battery briefcase, a purple plasma orb, and chunky electric-outlined block letters for the royals (purple K, magenta J, blue Q, blue A). The whole thing leans hard into the steampunk-meets-sticky wild mechanic angle, and it earns the look. Nine paying regulars, twenty fixed lines, and one column where everything important happens.