Onimusha 3 - Demon Siege
Easy mode:
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"Game Over" twice in normal mode, and easy mode will be unlocked
Hard mode:
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Complete the game on normal mode once
Issen mode:
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Complete game on hard mode once
Oni Hard mode:
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Complete Issen mode once
Ultimate mode:
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Complete the shooting mini game
The three swords from Onimusha 1:
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Complete all of the phantim realms, finish the game once,
and start new game.
Minigames:
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Heihachi Buraiden
Finish the game once on any difficulty
Puzzle mini game C
omplete all puzzles in the normal game
Secret training mode
Complete normal training mode once and unlock it after
finishing the game
Shooting mini game
Finish game once on 'Normal' difficulty