One-Hit Kill Mode
Description: unlock One-Hit Kill Mode
How to unlock: beat Team Onimusha Mode. One-Hit Kill Mode is the same game, except you can only damage enemies with one hit kills.

Unlock Man in Black Mode
How to unlock: Win the game once. The Man in Black Mode allows you to play the game as the man in black. Run through the game and collect film rolls in order to unlock game FMVs.

Unlock Team Onimusha Mode
How to unlock: Win the game once to unlock team Onimusha Mode, a special mini-game that allows you to play sections of the game through with a series of characters.

Leather costume/outfit
Win the game with the Onimusha rank.

Easy mode
Start a game and die 3 times. A message will appear to indicate that a new easy difficulty setting is available. *** You cannot achieve an Onimusha rank when playing in easy mode.

Oyuu's alternate costume/outfit
Get a 100% scenario completion.

Strongest equipment mode
Win the game under the hard difficulty setting. Start new game to begin with the Blazing Fire Sword, 20,000 in money, 30 Intense Medicines, 10 Wood, all level 3 armors, unlimited ammunition, and skill always full.

Ending bonuses
Win the game to unlock the Scenario Route option, Man In Black Suit mini-game, Oni Organization mini-game, and the Puzzle Illusion Dream Dimension mini-game.

Hard mode
Win the game under the normal difficulty setting.

Issen mode
Complete the Oni Organization mini-game. You must hit with a One Flash attack in order to do damage to opponents.

Puzzle Illusion Dream Dimension
Win the game with all Paintings Of Beauties.