Series
Mystery Crazy series
Mystery Crazy series: from collected symbols to Hold and Win
The Mystery Crazy line started in 2025 when 7777 Gaming used Mystery Crazy 20 Bucks to fix the franchise around a 3x5 money-box format, mystery symbols, respins, random multipliers and fixed jackpots. Its 20 paylines and medium volatility support a symbol-collection loop with sticky-symbol behavior, while the maximum reaches 10,000x.
Ranked by Slot Score
| Game | Year | RTP | Volatility | Slot Score |
|---|---|---|---|---|
 Mystery Crazy 20 Bucks7777 Gaming | 2025 | 96.04% | Medium volatility | 72 |
 Mystery Crazy 100 BucksLatest7777 Gaming | 2025 | 96.2% | Medium/High | 80 |
The founding game spreads its feature weight across collection, substitution and sticky outcomes. That makes the mystery-symbol layer part of a broader bonus system rather than a single decisive event.
Mystery Crazy 100 Bucks increases the line count to 100, raises volatility to medium/high and replaces the earlier collection emphasis with Hold and Win. The 10,000x maximum remains unchanged, so the later game intensifies hit-pattern exposure and bonus risk instead of expanding the ceiling.