The method of unlocking each character's clothing is to open it once in any game mode and at any difficulty, and unlock a piece of clothing in turn. Repeat this mode with the same difficulty and you can't continue to unlock it. For example, playing arcade mode, simple difficulty clearance can unlock a thing, but repeated play is simple and useless, and you must play other difficulties such as ordinary; Or go to time mode or survival mode and play simple difficulty. If it is a double mode, each person can unlock one at the same time.

Special clothes, such as Christie's swimsuit, need other methods, such as getting through the survival mode under difficult conditions at one time.