The main bonus round in Assassin Moon is called the HyperHold feature, which works similarly to other games using this game mechanic. To activate it, you need to land at least six Moon scatter symbols anywhere on the screen. During the hyper hold feature, these symbols will stay locked in place, and re-spins will occur as long as new moons appear. The feature ends when you either fill the entire screen with hyperhold moon symbols or fail to land a new moon symbol for three spins. The cash amount is then calculated based on the moons currently on the screen.