Almighty Mustang Express: White Bison Slot Review

A gold steam train hauls cash prizes onto a Wild West reel set, and the respin round they trigger is where this game actually lives. It is the second Almighty Mustang Express title, and Blueprint kept the original's shape almost untouched: 5x3 grid, 20 fixed lines paying left to right only, and the same three fixed cashpots at Minor 25x, Major 100x and Grand 500x.

What changed is the ambition. The 2025 game capped out at 1,800x; White Bison nearly doubles that to 3,500x, and pays for it with a 94.30% RTP where the first ran 95%. Same architecture, bigger swing, thinner return.

The line game barely participates. Both premiums, the White Bison and the Bell, top out at 15x for a full five-reel hit, and the ten symbols are really five pay tiers wearing different art. Everything worth chasing sits in the cash symbols that land loose on the reels and pay on top of anything the lines produce.

The whole background is one sunset, orange sky bleeding into red desert, with a gold-plated locomotive running along the bottom left of the frame, black smoke pouring back across the reels and a rider perched on the roof. The reel frame is built as a train carriage: riveted gold trim, brass pipework and little pressure gauges along the bottom rail, dark navy panels behind the symbols. Three cashpot meters sit above on winged brass plaques, Minor in green, Grand in purple, Major in blue, reading 25.00, 500.00 and 100.00 at a one-unit stake.

Symbol art is Plains iconography in warm circular medallions, a bald eagle against blue sky, a grey wolf, a tomahawk crossed over a sunset, with royals as carved letters each trailing a single feather. The White Bison is the only symbol with any threat in it, boxed in a squared gold frame with red lightning crackling out of its eyes. It is a strange mash, steampunk train plus sacred white buffalo, and the western dressing is doing a lot of work to hold the two together. The original's neon pink and purple 1950s palette is gone, swapped for gold and sunset. Clean, bright, and about as safe as this studio's art gets.

Long stretches of nothing much, then a burst. Base spins mostly hand back a fraction of the stake and the reels are quiet enough that the eye stops watching paylines altogether and starts counting glowing cash orbs instead. Four of them, five of them, no train, spin gone. That near-miss is the tension the game runs on, and it repeats a lot.

The dependency chain is unusually narrow. A decent result needs cash symbols, then a train, then a board that keeps resetting the counter, and with only one train allowed in view at a time there is no way to accelerate any of it. No buy button means the good round arrives when it arrives.

Volatility is not published anywhere, though everything about the design points high, and the 94.30% return makes the flat spells bite harder than they did in the first game. Sessions probably swing more than the modest paytable suggests, which is the point of the design.

The good version of this game is the Almighty Mustang Express round, and everything else is the queue for it. When it lands, ten positions paying 5x to 50x with adders stacking on top is a different animal from the board underneath, and the 3,500x cap suddenly makes sense. At 94.30% the queue is expensive though, and that number sits under what the first entry ran.

No buy button, no wheel of extras, just two respin rounds and a train deciding which one a spin gets you. The odds on the cap are quoted at 1 in 4,528, which is short for a 3,500x ceiling and likely measures something narrower than it sounds.