Michelle's alternate costume:
Successfully complete the game under the normal difficulty setting.
Michelle's second alternate costume:
Successfully complete the game with an "Onimusha" rank. Alternately, play the
game with a memory card with a saved game from Onimusha Blade Warriors.
Jacques' alternate costume:
Successfully complete the game under the normal difficulty setting with a high
score as Jacques. Alternately, successfully complete the game as Samanosuke's
alternate costume.
Samanosuke's alternate costume:
Successfully complete the game under the normal difficulty setting with a high
score as Samanosuke. Alternately, successfully complete the game as Jacques'
alternate costume.
Panda costume:
Successfully complete secret training mode. Alternately, play the game with a
memory card with a saved game from Onimusha Blade Warriors.
Alternate ending sequence:
Increase all seven Haori of Ako to the maximum. This requires all Kodama to be
found.
Easy difficulty:
Intentionally lose the game two times under the normal difficulty setting.
Hard difficulty:
Successfully complete the game under the normal difficulty setting.
Critical (Issen) mode:
Successfully complete the game under the hard difficulty setting. In this mode,
only critical hits can kill opponents.
Oni Hard mode:
Successfully complete the game in Critical (Issen) mode.
Ultimate mode:
Successfully complete the Oni shooting mini game. The game will start with Sam
having the Bishamon sword; Jacques having his best Oni Musou; unlimited arrows,
bullets, unlimited Oni power, thirty Medicines, and ten Talismans.
Original Onimusha swords:
Successfully complete the game with all three items from the Phantom Realms.
Then, start a new game to have all three swords from the original Onimusha.
Bishamon sword:
Successfully complete the game with the "Onimusha" rank. Alternately, get the
Bishamon sword in the Phantom Realm in Honnouji when Sam goes to the past. To
find it, go to the save location at the foot of the stairs to the temple,
then look to your upper left to find the hanging man. Approach him to be sent
to the Phantom Realm. Collect eight Red Orbs to unlock the chest that contains
the Bishamon sword.
Oni Musou:
Have Jacques go through the Phantom Realm in Honnouji.
Adventures of Heihachi (Heihachi Buraiden) mode:
Successfully complete the game. Heihachi (Honda) is now selectable.
Genma Puzzle mini game:
Solve all the puzzles in the game.
Secret training mode mini-game:
Successfully complete normal training mode, then complete the game.
Oni Shooting mini-game:
Successfully complete the game under the normal difficulty setting.
Ako's Black Haori:
Successfully complete Issen/Oni training.
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