Onimusha 2: Samurai's Destiny
To get easy mode, die three times and then go to the Main Menu and select 'Tokuten'. Now go to difficulty settings and switch it to Easy.
Beat the game on Normal difficulty.
Kick ass mode:
Beat the game on Hard difficulty.
Beat the game on any difficulty to get the Onimusha 3 teaser, the Scenario Route mode, Man In Black mode, and Team Onimusha mode.
Mind Twister mode:
Beat the game and get all paintings.
Beat the game with the rank 'Onimusha.'
Thanks to Revolution readers DaManP, Chase Hall, mike, G-bAbY, and Chase Hall!