A type of free spins with no set number of spins, which instead ends when all of a specific 'end symbol' are collected.

End-Condition Free Spins is a bonus round that starts with a theoretically unlimited number of spins, instead of a set number like '10' or '15'.

Unlike the retrigger method which extends the round, this free spin round continues without end until specific 'end symbols' appear and are collected. The core of this feature is to provide a unique tension of not knowing when the round will end.