The Bonus Boost structure
Aristocrat describes Bonus Boost Red Festival and Blue Festival as having three Hold & Spin bonuses that may trigger separately or combine. The Multi-Feature Trigger can award two or all of those enhancements during one bonus.
Double Up
Double Up expands the Hold & Spin play area from 15 positions to 30. This changes the amount of available space rather than merely adding a multiplier to one award.
Extra Spins
Extra Spins changes the starting counter to four spins instead of the conventional three-spin opening used by many Hold & Spin games. Check the installed paytable for the exact counter and reset behavior.
Ultra
Ultra can randomly boost prize values during the feature. It is a possible bonus enhancement and does not grow predictably between players.
Multi-Feature Trigger
The Multi-Feature Trigger is what connects the three ideas. Two enhancements—or all of them—may operate in the same Hold & Spin round, creating a larger bonus area, more starting spins, boosted values, or a combination of those effects.
Related Bao Zhu Zhao Fu versions
Aristocrat’s family page also lists Jade Celebration and Purple Celebration. Jade Celebration uses Zone Boost multiplier regions, two Hold & Spin matrices, and a 4-3-2-1 spin counter. Purple Celebration uses its own combination of Cash-on-Reel, free-game, wheel, and extra-spin elements.
Jade Celebration and Purple Celebration use different bonus rules from Bonus Boost, so check the cabinet title before comparing their features.