Get Difficult Mode:Unlock Oni Spirits Mini Game:
Defeat the game in under three hours to unlock Difficult Mode.
Unlock Easy Mode:
To unlock the ''Easy'' mode setting, simply die 5 times on normal mode. You will then receive a message saying you have unlocked it.
Unlock Kaedae's 2nd Costume:
Get all 30 Flourites to get Kaedae's 2nd costume.
To unlock the Oni Spirits mini game, collect around 20-29 pieces of Flourite. Then a new mini-game will be available at the start menu.
Unlock Samanosuke's 2nd Costume:
To unlock Samanosuke's second costume, beat the game once on Difficult.
Thanks to Revolution reader Mr. Saotome!