Series
Holly Jolly Bonanza series
Holly Jolly Bonanza series: How the holiday grid changed
The Holly Jolly Bonanza series started in 2023 when Booming Games established its Christmas formula on a 6x5 Pay Anywhere grid with cascades, random multipliers and free spins. The first of the Holly Jolly Bonanza slots, Holly Jolly Bonanza, added colossal reels and Bonus Buy to that high-volatility framework, with a 6,500x maximum win.
Ranked by Slot Score
| Game | Year | RTP | Volatility | Slot Score |
|---|---|---|---|---|
 Holly Jolly BonanzaBooming Games | 2023 | 96.6% | High volatility | 79 |
 Holly Jolly Bonanza 2LatestBooming Games | 2024 | 96.1% | High volatility | 83 |
Holly Jolly Bonanza 2 followed in 2024 without altering the 6x5 grid, Pay Anywhere scoring or 6,500x ceiling. Its mechanical change sits in symbol handling: mystery and substitution symbols join the cascades, while free-spin extensions, multipliers and Bonus Buy remain part of the loop.
The original places more emphasis on colossal-reel events; the sequel adds more uncertainty before symbols resolve. That distinction matters more than the shared winter setting because it changes how each cascade develops without changing the franchise's high-risk payout limit.