In top-grossing slots apps, machines with respins have the second-highest average revenue impact (+3.3% WoW) of any base game mechanic. Big Fish Casino releases more machines with respins than almost any other app and sees an unusually large revenue impact from them (+8.5% WoW).
As slot machines continue to incorporate elements from other genres, designers have to strike a balance between introducing new mechanics and maintaining the flow of slots play.
Slot machines with standalone fill meter progressions have much higher average revenue impacts than those that combine fill meters with maps or collections.
Machines with mini-game bonuses have a high estimated revenue impact of +2.6% WoW, but they are released less frequently than many less impactful bonuses. Most tracked slots apps released one or no mini-game bonuses in the past 12 months
Bunch Boom Animals, a new machine in DoubleU Casino, innovates on cascading reel sets with a scoring system inspired by match-3 games.
During the base spins in House of Fun’s My Pet Dragon: Finnegan’s Fortunes, players collect gems to upgrade dragons. Each dragon offers a unique free spin bonus that improves with upgrades. Players choose which dragon to activate, and the active dragon randomly triggers its bonus.