Bison Boom (Northern Lights) – Review & Demo Play

The Bison Boom Slot Game

I spent a fair chunk of time on Bison Boom and the prairie vibe came across well. You get dry wilderness under shifting skies, a mountain backdrop, pines, and the dynamite crate to the left hinting at an explosive twist. When the bonus lands, the scene shifts to night and the soundtrack leans into a laid back melody. The layout keeps things simple, with the controls stacked on the right, so spinning up the 5x3, 20 line game is as straightforward as it looks.

Symbols and Payouts in Bison Boom

Bison Boom runs a 5 reel, 3 row grid with 20 unchangeable paylines. Wins land when three or more matching symbols fall left to right on a valid line, and all pays scale with your stake. The low wins are the poker royals: Jack pays 0.1x to 0.5x, Queen 0.2x to 0.6x, King 0.3x to 0.8x, and Ace 0.4x to 1x. Regular pays won’t set records on their own, but they do keep the base game ticking while you chase the features.

High win symbols fit the theme. Raccoon returns 0.5x, 1x, and 2x; Eagle pays 0.6x, 1.5x, and 3x; Wolf pays 1x, 2x, and 4x; Bear tops the board at 2x, 4x, and 8x for five of a kind. The Bison Wild substitutes for all regulars and matches the Bear’s top line win, so a full wild line delivers 8x. The bigger value comes later, once wild bursts and Moon modifiers start layering over these base figures.

Bison Boom Symbols and Paytable

Symbol	Quantity	Payout
	5	x16
	4	x8
	3	x4
	5	x8
	4	x4
	3	x2
	5	x6
	4	x3
	3	x1.2
	5	x4
	4	x2
	3	x1
	5	x2
	4	x1
	3	x0.8
	5	x1.6
	4	x0.8
	3	x0.6
	5	x1.2
	4	x0.6
	3	x0.4
	5	x1
	4	x0.4
	3	x0.2
	Scatter
	Bonus
	Wild

Bison Boom Slot Bonus Features

Mini Dynamite tokens can land in the base game and stack into the wooden crate beside the reels. At random, the crate can detonate and trigger Bison Wild Boom, splashing up to 15 Bison Wilds across the grid. Those extra wilds replace regular symbols and often turn near misses into lines, so this is the nudge that creates the bigger base hits. It’s an on spin event, so you never quite know when the blast will drop.

Moon symbols sit at the heart of the bonus. Red and Blue Moons carry multipliers up to 7x, with a modifier able to upgrade a Red Moon to a Blue one. To expand the bonus board, land two scatters on reels 1 and 3 to feed the Feature Upgrade meter. Every 10 tokens fills one section, adding an extra row to Bison Spins, up to four sections. Progress is saved per bet level and resets after it’s used in the next feature.

Three scatters trigger Bison Spins, a Link & Win style bonus with three respins. Before it starts, you can pick Upsizer options for a listed price. During the round, only Moons, blanks, and Feature Modifiers land, and any new Moon or modifier resets the respins to three. Modifiers include Collector, Adder, Persistent Adder, No 1x Moon, Splitter, Key, Bomb, and Doubler. Fill the board for a flat 2,000x, while the wider feature peaks at 11,000x.

How to Win at Bison Boom Slot

Gameplay is straightforward. Set your stake between €0.20 and €20 per spin, tap the main spin for one round, or use Autoplay for up to 100 spins if the option is present. A lightning icon toggles faster spins, and the menu shows the paytable and rules. Wins pay on 20 fixed lines from the leftmost reel. In the base game, dynamite tokens feed the wild crate and two scatter sets feed the upgrade meter. The Buy Bonus costs 71.8x, and meter progress isn’t used when you buy.

Bison Boom Slot RTP & Volatility

Bison Boom ships with three RTP settings: 96.15%, 94.08%, and 92.12%. Volatility sits in the middle, which suits the steady trickle of line wins and the regular feature activity. A 33.55% hit frequency means you’ll see wins on roughly one in three spins over time. Stakes range from €0.20 to €20, which covers casual sessions and lets you size bets around the feature cadence without leaning into very high limits.

The ceiling is set high enough to stay interesting. The max exposure reaches 11,000x the stake, helped by Moon multipliers, expanded rows, and stacked modifiers. Filling every position in Bison Spins pays a flat 2,000x, while five of a kind wilds on a line pay 8x in the base math. RTP choice depends on the venue, so the experience can vary a bit from place to place, but the medium profile and hit rate keep the rhythm consistent.

The Final Thoughts on Bison Boom

My take on Bison Boom is simple. The theme isn’t fresh, yet the production hits the right notes and the switch to a night sky during the bonus adds flavour. The 20 line 5x3 setup is easy to settle into, and the interface keeps all controls tidy. What sold it for me was the mix of Bison Wild Boom bursts and the Link & Win bonus with Upsizer and feature modifiers. It feels busy without being messy.

On the flip side, regular symbol pays are modest, and the Buy Bonus price at 71.8x asks for a decent bankroll if you plan to chain buys. Still, the 33.55% win frequency, medium volatility, upgradeable rows, and the list of modifiers make it a solid pick when you fancy a prairie slot with a bit of firepower. I’ll be back for more runs when I’m in the mood for steady action with bursts of heat.