Series
Bonanza Billion series
Bonanza Billion series: from cluster avalanches to selectable bonuses
Bonanza Billion began in 2021 when BGaming used Bonanza BIllion to fix the line's core formula: a 6x5 grid, cascading cluster wins, random multipliers and free spins. Its high-volatility model and 15,000x ceiling made large multiplier chains, rather than conventional paylines, the central attraction.
Ranked by Slot Score
| Game | Year | RTP | Volatility | Slot Score |
|---|---|---|---|---|
 Bonanza BIllionBGaming | 2021 | 96% | High volatility | 81 |
 1Win Billion BonanzaBGaming | 2024 | 95.97% | — | 73 |
 Bonanza TrillionLatestBGaming | 2025 | 97.17% | High volatility | 78 |
 Bonanza Billion XtremeBGaming | — | 96.97% | High volatility | 82 |
1Win Billion Bonanza retained the 6x5 screen, cascades and 15,000x cap but labeled wins as Pay Anywhere and added direct bonus access. Extra free spins and a free-spins multiplier gave the bonus more room to extend, while the lower maximum bet narrowed the staking range.
Bonanza Trillion changed the tradeoff: its listed RTP rose to 97.17%, yet the maximum win fell to 5,000x. Choosing a free-spins mode added more control over the bonus route, so Trillion is not simply a higher-numbered copy of Billion.
Bonanza Billion Xtreme pushes in the opposite direction, restoring high volatility and lifting the ceiling to 20,000x while retaining Pay Anywhere wins, avalanches, random multipliers and selectable free-spins modes. The series therefore grew by moving the same cascade framework between a stronger RTP profile, more bonus choice and a higher reward cap.