Release the Bison is a thrilling slot from Pragmatic Play, packed with stampeding Wild Respins, Guaranteed Win spins, an exciting Free Spins round, and more. Dare to chase the maximum win of 3,000x your bet across five action-packed reels of lush American wilderness. Spin through our full review below and try the Release the Bison demo before you play for real money at TwentyOne!
Bison-themed slots have carved out a solid niche in the online casino world, and Pragmatic Play's Release the Bison is a worthy addition to that category. While the theme may not break new ground, the pedigree of the developer alone makes this slot well worth a closer look — so let's dive straight in!
Pragmatic Play consistently delivers some of the most polished and popular slots on the market, and this release is no exception. Meanwhile, the game's setting takes players into a vibrant, lush slice of American nature — a refreshing departure from the barren prairie aesthetic found in many rival bison slots. Smooth animations and impressive production values round out a visually appealing package.
Pragmatic Play stands among the elite tier of online slot developers, with an extensive catalogue that regularly dominates popularity charts at casinos worldwide. The studio's commitment to quality is evident across every release — there are very few misfires in their lineup. Whether you're a seasoned spinner or new to online slots, Pragmatic Play titles are a safe recommendation, and Release the Bison is a fine example of why the developer has earned such a strong reputation.
True to its name, Release the Bison immerses players in the world of North American wildlife. Unlike many entries in the genre that lean on dusty, barren landscapes, this slot opts for richer, greener surroundings filled with lush flora and fauna. The animations are smooth and the overall production values are notably high — making for a visually engaging experience that stands slightly apart from the typical bison-themed competition, even if the core concept remains familiar.
Release the Bison is classified as a high volatility slot, meaning players can expect less frequent but potentially more rewarding payouts over the course of their session. The game's hit frequency sits at 28.90%, offering a reasonable number of winning spins to keep the action engaging.
The maximum win is 3,000x your bet — a figure that some high-volatility enthusiasts may find on the conservative side, but one that still offers exciting win potential. This slot suits players who enjoy the thrill of big-hit mechanics without venturing into extreme variance territory.
At its core, Release the Bison follows a classic online slot structure: 5 reels, 4 rows, and 20 fixed paylines. This familiar format ensures accessibility for players of all experience levels, from newcomers to seasoned slot enthusiasts. Wins are formed by landing matching symbols across active paylines from left to right.
The user interface is clean, intuitive, and professionally designed — a hallmark of Pragmatic Play's development approach. All key controls and settings are easily accessible, letting players focus on the spinning action without unnecessary friction. While the layout plays it safe mechanically, the bonus features (covered below) more than compensate for the straightforward reel setup.
Release the Bison features a dynamic paytable with 9 pay symbols in total. These are divided into two groups:
Below is a full breakdown of the symbol payouts across winning combinations:
Release the Bison doesn't hold back when it comes to bonus mechanics. From roaming Wilds to multiplier-boosting free spins, here's everything the slot has to offer beyond the base game reels:
The mighty Bison serves as the game's Wild symbol, substituting for all regular pay symbols to help complete winning combinations. Bison Wilds also carry their own payout value — land a full five-of-a-kind Wild combination and you'll pocket an impressive 12.50x your stake.
Land 4 or more Wild symbols on the reels to trigger the exciting Wild Respins feature. During this mode:
This mechanic can generate some seriously rewarding outcomes, especially when Wilds keep appearing to push the multiplier higher and higher.
At any point during base game play, Release the Bison may randomly award a Guaranteed Win Spin. As the name suggests, this spin is never a loss — it guarantees a payout worth between 10x and 40x your stake, giving your balance a welcome boost out of nowhere.
Scatter 3 or more Bonus symbols in the base game or during the Wild Respins feature to unlock the Free Spins round. Before the feature begins, a wheel spin determines:
In the best-case scenario, you'll launch into the feature with 18 free spins and a 5x win multiplier already active. During free spins, all landing Wilds automatically become Roaming Wilds, and collecting enough of them can further boost both your multiplier and your remaining spin count.
For players eager to reach the Free Spins bonus more frequently, the Ante Bet option is available at any time. Activating it increases your total bet by 1.25x in exchange for a significantly higher chance of triggering the Free Spins feature — a worthwhile trade-off for bonus hunters.
Don't want to wait for Bonus symbols to land organically? The Buy Feature menu lets you purchase direct access to the Free Spins round by pre-selecting your Bonus symbol count:
This feature is ideal for players who want to jump straight into the high-potential bonus action.
Release the Bison is a thoroughly well-crafted slot from Pragmatic Play that delivers a polished, feature-rich experience from start to finish. The Wild Respins mechanic and Free Spins round with escalating multipliers provide genuine excitement, and the overall production quality is exactly what you'd expect from one of the industry's top studios.
The only real criticism is that the 3,000x maximum win may feel modest for a high volatility slot — players chasing life-changing jackpot potential might look elsewhere. But for those who enjoy a rewarding blend of solid mechanics, frequent bonus triggers, and excellent audiovisuals, Release the Bison is absolutely worth adding to your playlist. Try the demo at https://www.21.com or spin for real money at TwentyOne today!
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