Bison Boom

Bison Boom is a five-reel slot from Northern Lights Gaming, a studio operating under the Games Global umbrella, released in July 2024. As the name implies, this is another entry in the ever-popular buffalo/bison genre of online slots, and with a confirmed 96.15% RTP it lands among the more generous payout rates you'll find in that crowded category.

Grassland theme, straightforward setup

Expect the visual staples of the genre here — herds of bison, wide plains, and the kind of rugged wildlife iconography that's become a shorthand for "big American nature slot" across dozens of studios. Northern Lights hasn't reinvented the wheel thematically, but the mechanical side of Bison Boom is built to be flexible: the game runs on a variable paylines structure ranging from 20 up to 45 active lines depending on how the reels configure on any given spin, giving players a mix of consistency and variety spin to spin.

What 96.15% RTP and a 33% hit frequency add up to

That RTP figure means the game is designed to pay back £96.15 for every £100 wagered over a large enough sample of spins, keeping the house edge to a lean 3.85% — noticeably better than a lot of comparable bison-themed slots. Paired with a quoted hit frequency of around 33%, roughly one in three spins should produce some kind of return, which tends to make the moment-to-moment experience feel more active than titles that hold back for long dry stretches.

Medium volatility keeps things balanced

Northern Lights has rated Bison Boom as Medium volatility, sitting neatly between the extremes of frequent-but-small and rare-but-huge. That balance, combined with the roughly one-in-three hit rate, suggests a game that keeps players engaged without demanding an oversized bankroll to survive to the bonus round. It's a sensible profile for players who want some texture and swing without the punishing droughts that high-volatility bison slots are known for.

Max win ceiling and betting range

The maximum win on Bison Boom is set at 11,000x the triggering stake — a serious number, even if it sits a little below the biggest headline max wins the genre has produced elsewhere. Stakes run from 20p/c up to £/€20 per spin, keeping the game accessible to a wide range of bankrolls, from cautious low-stakes sessions to more committed play.

Should you give it a spin?

Bison Boom doesn't try to be the flashiest buffalo slot on the market, but its numbers do a lot of the talking — a competitive 96.15% RTP, medium volatility, and a hit rate that keeps the reels feeling lively. If that combination sounds like your kind of session, the smartest first move is to try the free demo at johnessyslots and get a feel for how often those wins land before staking real money.