Bubble Wild 2

Hold and Respin, or 'Hold & Win', is one of the most popular core bonus game mechanics in modern slots. The essence of this feature, unlike traditional free spins, is to 'Hold' bonus symbols on the reels and 'Respin' the remaining empty spaces to fill up the screen. This system was popularized worldwide through 'Money Train 2's' 'Money Cart Bonus' and is the foundation for numerous developer-specific brand features like Wazdan's 'Hold the Jackpot™' and Playtech's 'Fire Blaze™'.

A Symbol Collector is a powerful special symbol that primarily appears in bonus rounds like 'Hold and Respin'. Its sole function is to 'collect' the values of other cash value symbols (like coins) on the screen and absorb them into its own value. It goes beyond simply adding values, playing the role of consolidating scattered small values into one massive value to exponentially amplify the potential of the bonus round.