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What Is Bonanza Billion
Bonanza Billion is BGaming’s entry into the scatter-pays cascade slot category — a format popularised by Pragmatic Play’s Sweet Bonanza. Released in 2021, it was BGaming’s first title with cascading reels, and the studio has since built an entire franchise around it: Bonanza Billion Xmas, Bonanza Billion Xtreme, Bonanza Trillion, and several branded variants. The original remains the most widely distributed entry point in Australia.
The format is familiar to Sweet Bonanza players: large grid, no paylines, wins from symbol clusters of 8+ anywhere on screen, winning symbols removed and replaced from above. BGaming’s specific contribution is the Multiplier Bomb — a symbol that locks on screen during free spins, accumulates alongside other bombs, then applies its combined value to the full chain win once the cascade ends.
| Provider | BGaming |
| Grid | 6×5, scatter pays (no fixed paylines) |
| Win condition | 8 or more matching symbols anywhere on the grid |
| RTP | 96% (default); ~95.97% published; operator range applies |
| Volatility | High |
| Hit frequency | ~38.61% |
| Free spins trigger frequency | ~1 in 395 spins |
| Max win | 15,000× stake |
| Min / Max bet | A$0.20 / A$12 |
| Multipliers (base game) | None (multiplier bombs appear in free spins only) |
| Multipliers (free spins) | 2×–100× per bomb; additive before application |
| Free spins | 10 (4 scatters), 20 (5 scatters), 30 (6 scatters); retrigger +5 |
| Bonus features | Refilling Reels, Multiplier Bombs, Chance ×2, Bonus Buy |
| Mobile compatible | Yes — HTML5, iOS and Android |
| Demo available | Yes |
The 6×5 Scatter Pays Grid
Thirty positions, six reels, five rows. No paylines — wins trigger by cluster count alone. Eight matching symbols anywhere pays; twelve pays more; twenty or more of a premium symbol pays significantly more. The symbol hierarchy runs from card suits at the bottom through fruits (grapes, watermelons, plums) to gems at the top. Gems are what you want filling the screen during free spins.
The Wild symbol substitutes for all regular symbols and appears across all reels. It does not have a fixed value of its own — its function is purely combinatorial, extending clusters that would otherwise fall short of a win threshold or bump a borderline cluster from one payout tier to the next.
Refilling Reels (Cascades)
Every winning cluster triggers the Refilling Reels mechanic: winning symbols are removed and new ones drop in from the top to fill the vacated positions. If the new symbols form another cluster, they pay and are removed in turn. This continues until a spin produces no winning combination. Each separate refill is counted as part of the same spin — so a sequence that produces four consecutive winning refills generates four separate win calculations before the spin finally resolves.
In practice: four refills at 0.5× stake each total 2× your bet from one spin. A chain hitting a premium cluster twice can reach 10×–25× stake. Typical per-refill returns sit in the 0.5×–1.5× range — the base game plays steadily, with the real wins reserved for the bonus.
Free Spins and Multiplier Bombs
Free spins are triggered by landing scatter symbols — kaleidoscope icons — anywhere on the grid. The trigger scales with scatter count:
- 4 scatters — 10 free spins
- 5 scatters — 20 free spins
- 6 scatters — 30 free spins
- Retrigger (3+ scatters during free spins) — +5 additional spins
The Multiplier Bomb only appears during free spins. When it lands, it locks on screen for the duration of the current refilling chain. Additional bombs in the same chain have their values added together — not multiplied against each other. Once the chain ends, the combined bomb total multiplies that chain’s full win. Concrete example: a chain produces 40× stake in symbol wins with two bombs (15× and 20×) locked. Combined value = 35×. Applied to the chain win: 40 × 35 = 1,400× stake from that single sequence. The bomb range is 2×–100× each. The 15,000× ceiling requires a 150× cluster win with a single 100× bomb locked — the best-case combination of cascade size and bomb value in the same chain.
Chance ×2 and Bonus Buy
Chance ×2 doubles the scatter trigger probability at double the spin cost. A A$1 stake becomes A$2 per spin; the RTP remains consistent — you are paying for frequency, not improved expected value. Bonus Buy enters free spins directly at 100× stake (A$100 on a A$1 bet). The buy feature RTP can be configured separately by operators — some apply a lower figure to the buy option than the base game. Bonus Buy is restricted in some jurisdictions where feature purchase is regulated.
RTP, Volatility and Max Win
The default RTP is approximately 96% (published as 95.97% in some configurations). Operator RTP ranges apply — check your casino’s game info panel. The ~38.61% hit frequency means roughly one in three spins returns something, though typical per-refill values are small. Free spins trigger at approximately 1 in 395 spins — on a A$1 stake, expect to wager around A$395 on average before a trigger, with high variance meaning real sessions can run A$600–A$800+ without a bonus. The 15,000× maximum requires both a 150× cluster win and a 100× bomb in the same chain simultaneously — a mathematical ceiling, not a typical expectation. Realistic strong bonus sessions land in the 100×–500× range.
The Bonanza Billion Franchise
BGaming has expanded the original into a series with meaningfully different specifications:
- Bonanza Trillion — 6×5 grid, RTP 97.17%, max win 5,000×, faster pace with smaller multiplier ceiling
- Bonanza Billion Xmas — seasonal reskin with identical mechanics, festive symbols replacing fruits
- Bonanza Billion Xtreme — 6×5 grid, RTP 96.97%, multiplier bombs up to 1,000× (vs 100× in the original), max win 20,000×, Super Free Spins buy option at 500× stake with bombs starting at 20×
Pros and Cons
- Additive multiplier bomb mechanic creates genuine large-win scenarios — two 50× bombs in one chain apply as 100× to that chain’s win total
- Up to 30 free spins for 6 scatters — the maximum trigger is one of the more generous starting allocations in the category
- Chance ×2 provides a documented way to increase scatter trigger frequency without distorting expected value
- Refilling Reels add compound win potential to every base game spin — a single button press can produce 4+ separate win calculations. Demo available freely — full feature access including free spins and Refilling Reels without a casino account
- Free spins trigger at ~1 in 395 spins — one of the less frequent bonus triggers among comparable scatter-pays titles
- Multiplier bombs do not appear in the base game — the core differentiating mechanic is entirely bonus-locked
- A$12 maximum bet is restrictive — high-stakes players are capped at A$180,000 absolute maximum from 15,000× at max bet
- Bonanza Billion Xtreme outperforms the original on RTP (96.97% vs 96%), multiplier ceiling (1,000× vs 100× per bomb), and max win (20,000× vs 15,000×)
- Base game symbol wins are small (0.5×–1.5× per refill typically) — the game plays dry without the bonus
About BGaming
BGaming spun out from SoftSwiss as a standalone studio in 2018, headquartered in Malta with development offices in Poland and Georgia. Two early differentiators defined its positioning: native cryptocurrency support across the entire catalogue, and Provably Fair certification on selected games allowing players to cryptographically verify individual spin outcomes. Today the catalogue exceeds 250 titles across 3,000+ casino partners. The Bonanza series demonstrates BGaming’s iteration model — one core framework developed into multiple variants with progressively improved specifications. Licences include the MGA, Curaçao, Romania, and Greece; RNG certification from BMM Testlabs and eCOGRA.
FAQ
BGaming chose addition over multiplication to keep the math model certifiable. If two 100× bombs multiplied each other (10,000×), the ceiling would be theoretically astronomical and difficult to audit. Addition caps the total at the sum of all bombs in one chain — three 40× bombs produce 120× total, marginally more than a single 100×. The practical result: landing several mid-range bombs in the same cascade can outperform a single large bomb, which rewards longer cascade chains rather than one high-value symbol landing alone.
On objective metrics, no. Xtreme has better RTP (96.97% vs 96%), higher multiplier ceiling (1,000× vs 100× per bomb), and higher max win (20,000× vs 15,000×). The original makes sense if your casino offers it with a promotional advantage — free spins or cashback that outweigh the RTP gap. For real-money sessions with no promotional difference between the two, Xtreme is the stronger product across every published specification.
The bonus still runs and pays through cluster wins and cascades alone — bombs are not required for the round to be valuable. Without any bomb landing, the practical ceiling from cascade-only symbol wins is roughly 200×–500× stake depending on cluster size and chain length. A 30-spin trigger with no bombs can still return meaningful value if premium gem clusters form repeatedly. The bombs are the mechanism that pushes the round beyond that ceiling — without them, you are playing a cascade bonus rather than a multiplier bomb bonus, and the two produce very different outcome distributions.