This mode will become an available option when you Complete the game. In this mode you play as Heihachi Buraiden.

Unlock Oni Training Mini-Game:
This bonus training session is unlocked when you complete every training session and beat the game.

Unlock Oni Target Practice Mini-Game:
Complete the game on the Normal difficulty setting. In this game you use guns or arrows to pick off Genma eggs that go by on tracks.

Unlock Adventures of Heihachi Mini-Game:
This short storyline featuring Heihachi is unlocked when you complete the game on the Normal difficulty setting.

Unlock Genma Puzzle Space Mini-Game:
This mini-game is unlocked when you solve ALL the Puzzle Treasure Boxes and complete the game.

Unlock Michelle Aubert's Alternate Costume:
Complete the game on the Normal difficulty setting.

Unlock Michelle Aubert's Alternate Costume #2:
Complete the game with an Onimusha rank or play the game with a memory card with a saved game from 'Onimusha: Blade Warriors'.

Unlock Jacuqe Blanc's Alternate Costume:
Complete the game on the Normal difficulty setting.

Unlock Jacque Blanc's Alternate Costume #2:
Complete the game with high scores as Jacques or complete the game wearing Samanosuke’s alternate costume.

Unlock Samanosuke Akechi's Alternate Costume:
Complete the game with high scores as Samanosuke or complete the game while wearing Jacque's alternate outfit.

Unlock Samanosuke Akechi's Alternate Costume #2:
Have an 'Onimusha: Blade Warriors' saved file in your memory card.

Unlock Panda Costume:
Complete Secret Training mode or play the game with a memory card with a saved game from 'Onimusha: Blade Warriors'.

Unlock Easy Mode:
This mode is unlocked when you die 3 times in a stage while playing on Normal mode.

Unlock Hard Mode:
Beat the Normal difficulty setting to unlock the Hard mode.

Unlock Devilish Mode:
Beat the Critical difficulty setting to unlock Devilish mode.

Unlock Critical Mode:
Beat the game on the Hard difficulty setting. In this mode only critical hits will kill enemies.

Unlock Ultimate Mode:
Complete the Oni Target Practice mini game. In this mode each character will start with their most powerful weapon, 10 talismans, infinite Oni power, infinite bullets, infinite arrows and 30 medicines. Every weapon that is collected will be at it's max level.

Original Onimusha Swords:
To have all three swords from the original Onimusha successfully complete the game with all the three items from the Phantom Realms or play the game with a memory card with a saved game from Onimusha: Warlords.

Bishamon Sword:
To get a Bishamon sword complete the game with a Onimusha rank or get it in the Phantom Realm in Honnouji when Sam goes back to the past.

Ako's Black Haori:
To unlock Ako's Black Haori successfully complete Issen/Oni training.

Unlock Alternate Ending Sequence:
To view the alternative ending sequence increase all seven Haori of Ako to the maximum. To be able to do this all Kodama have to be found.

For a longer ending find all of Ako's vests.