Unstoppable Bison (Nailed It! Games) – Slot Review

Unstoppable Bison by Nailed It Games embraces the untamed wilderness of North America, transporting players to the vast, open plains where majestic wildlife roams free. The game’s theme revolves around the bison, a symbol of strength and endurance, charging across the reels with unstoppable force. The backdrop features sweeping landscapes, evoking the raw beauty of nature with golden prairies, rugged terrain, and dramatic skies.
The symbol design further reinforces the theme, featuring iconic animals such as moose, lynx, and eagles, alongside traditional high-card symbols styled to match the game’s rustic aesthetic. The Respin feature, triggered by stacked bison symbols, adds an exciting stampede-like effect, while the Jackpot Bonus Wheel introduces an element of anticipation as players chase massive rewards. With its immersive visuals and dynamic gameplay, Unstoppable Bison captures the essence of the wild frontier, offering an exhilarating adventure filled with nature’s most powerful creatures.
Unstoppable Bison is a high-volatility slot featuring a 5-reel, 4-row layout with 40 fixed paylines. With an RTP of 96.14% and a maximum win of 5,000x the stake, players can place bets ranging from £0.20 to £40.
Unstoppable Bison Symbols & Pay Table

The game includes 10 symbols in total. The low-paying symbols consist of J, Q, K, and A, while the premium symbols feature Moose, Lynx, Eagles, and Bisons. Additionally, the slot includes a Wild symbol and a Free Spins Scatter symbol. The Bison Premium symbol is the highest-paying, awarding 3x the stake for five on a payline. Wilds substitute for all regular symbols except for the Scatter.
Unstoppable Bison Features & Mechanics
Respin Feature
Landing a stack of Bison symbols on any base game reel triggers the Respin feature. All Bison symbols shift to the leftmost position in their row, and a respin is awarded. If additional Bison symbols land, another respin is granted, keeping all Bison symbols sticky throughout the feature. The respins continue until no new Bison symbols appear or the reels are completely filled with Bison symbols, at which point the final payout is awarded.
Stars Collection
During the base game, Bison symbols with a Star may appear. These Stars are collected in a wheel meter at the end of the spin. Each collected Star has the potential to trigger the Bonus Game.
Bonus Game
The Bonus Game gives players the chance to win one of four jackpots in a single spin of a prize wheel. The available jackpots are:
- Mini Jackpot – 10x the stake
- Minor Jackpot – 40x the stake
- Major Jackpot – 200x the stake
- Mega Jackpot – 5,000x the stake
Free Spins
Landing three or more Scatter symbols in a base game spin activates the Free Spins feature. Depending on the number of Scatters landed, players receive:
- 3 Scatters – 5 Free Spins
- 4 Scatters – 6 Free Spins
- 5 Scatters – 7 Free Spins
During Free Spins, only Bison symbols appear on the reels. These shift to the leftmost position in their row and remain sticky for the duration of the feature, maximizing win potential.
Conclusion
Unstoppable Bison by Nailed It! Games delivers a thrilling journey into the untamed wilderness, packed with high-energy gameplay and rewarding features. The Respin mechanic adds excitement as bison charge across the reels, while the Jackpot Bonus Wheel offers the potential for massive wins. The Free Spins mode, where only bison symbols are in play, ensures intense moments that can lead to impressive payouts. Be sure to try out this game on launch and check out our exclusive casino offers.