Score multipliers is a pass that can give you a boost in XP. While in battle, you will get a 30% XP. If you buy it, the lifetime of this item varies between the different types. It can be very useful to level up more quick. It can be unlocked at any rank and purchased with NaN. They can be bought in the garage or gotten as a daily bonus gift. (Recruits will usually get this in the beginning). In-game description (Golden):