Bigger Barn House Bonanza — The Wheel System
Definition / principle — The Wheel Bonus triggers when you land 3 Golden Egg Scatters anywhere on the 5×3 grid. You spin a wheel with 8 segments: Mega Egg, Windmill, Barn House, Random Jackpot, Free Spins, and three versions of the Bigger Wheel trigger. Each segment has different weightings — I've seen estimates suggesting the Bigger Wheel trigger sits at roughly 12.5% probability per segment, but Pragmatic Play doesn't publish these figures.
The Bigger Wheel expands the grid to 5×6 (7,776 ways) and adds the possibility of the Super Jackpot (25,000×). The random jackpot segments — Mini (12×), Minor (60×), Major (500×), Grand (5,000×) — can land during any spin in the base game or free spins, not just the wheel.
Comparative analysis — This wheel system is essentially a "bonus inside a bonus" architecture. It's not unique to Bigger Barn (the original Barn House Bonanza had a simpler version), but the addition of the Bigger Wheel and the 5-tier jackpot ladder makes it more complex than 95% of modern pokies. The problem is complexity doesn't equal value. The wheel segments are weighted, and the 25,000× win requires hitting the Bigger Wheel, then the Super Jackpot within it, and then actually landing the right combination. The true probability of hitting 25,000× is somewhere south of 0.001% per spin.
Practical application — If you're spinning Bigger Barn, you're playing for the free spins round with house upgrades. The straw → wood → brick progression on each house position during free spins multiplies prizes. Getting a brick house on a winning position with a 10× multiplier can produce spectacular mid-range wins (50-200× bet). That's the bread and butter. The jackpots are the cherry on top, but you shouldn't bank on them.
Big Bass Hold & Spinner — The Collection Mechanic
Definition / principle — Hold & Spinner is a mechanic where money symbols land with attached values. During the Hold & Spinner bonus round, these symbols lock in place, and you get re-spins. Each new money symbol that lands resets the re-spin counter (usually to 3). The round ends when you run out of re-spins or fill all positions. Collect all money symbols to multiply their values.
Big Bass Hold & Spinner uses a 6×4 grid (4,096 ways). The fisherman symbol acts as the collector — each fisherman that lands during the bonus round collects all visible money symbol values. If you fill the grid completely, you win the Grand prize (5,000×).
Comparative analysis — The Hold & Spinner mechanic, popularised by games like Money Train and Dead or Alive 2, gives players a sense of control. You see values landing. You watch the grid fill. There's a tangible progression. Bigger Barn's wheel, by contrast, is pure luck — you spin, you get what you get. The Hold & Spinner is more "skill-adjacent" (you can decide when to gamble collected values, though in Big Bass you can't — it's fixed).
Edward O. Thorp, the mathematician who cracked blackjack and later wrote about gambling systems, might have appreciated the Hold & Spinner's transparency. In his 2017 book A Man for All Markets, Thorp wrote: "Games that reveal intermediate outcomes allow the player to make informed decisions about risk. The problem is most casino games deliberately obscure these outcomes." (Thorp, 2017. Retrieved 12 March 2025.) Big Bass doesn't obscure — you see every money value as it lands.
Practical application — For Australian players, the Hold & Spinner mechanic offers a more predictable volatility curve. You'll see more frequent smaller bonuses (10-30×) and the occasional 100-300× hit. The 5,000× max win is achievable — there are documented hits on YouTube and forum posts (though I haven't verified them independently). Bigger Barn's 25,000× is theoretically achievable but practically a myth for most players.