One of four new costumes is unlocked after getting 10 quests, getting 20 quests, getting 30 quests, and completing Story mode under all difficulties. A fifth costume is accessed by choosing Aya by pressing Z at the character selection screen.
Berserk difficulty
Successfully complete the game under the Violent difficulty setting.
Double Rampage Ring 2
Successfully complete 160 Story mode quests.
Hard difficulty
Successfully complete the game under the Normal difficulty setting.
Misery
One of three new costumes is unlocked after getting 10 quests, getting 20 quests, and getting 30 quests.
Play as Misery
Successfully complete Story mode as Saki.
Play as Reiko
Successfully complete Story mode as Aya.
Rampage Ring
Successfully complete all Survival mode quests.
Reiko
One of three new costumes is unlocked after getting 10 quests, getting 20 quests, and getting 30 quests.
Saki
One of four new costumes is unlocked after getting 10 quests, getting 20 quests, getting 30 quests, and completing Story mode under all difficulties. A fifth costume is accessed by choosing Saki by pressing Z at the character selection screen.
Select locked Young Aya or Young Saki
Have either Young Aya or Young Saki unlocked. Press Z on the "Young" version of the girl you have unlocked. Before she loads, quickly switch to the other girl (that you do not have the "Young" version unlocked). The "Young" version of the character that was supposed to be locked will instead load.
View mode
Successfully complete Chapter 8 in Story mode.
Violent difficulty
Successfully complete the game under the Hard difficulty setting.