Monster Quest

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™'.

Bonus Buy is a feature designed for players who dislike waiting indefinitely, allowing them to pay a set multiple of their bet (usually 100x) to instantly start the game's highlight: the free spins or bonus round. The core of this feature is the concept of 'buying time' by skipping the tedious base game. It is one of the most beloved options for modern slot players who seek high risk and high return.