Unlock Tenso
Destroy Brainster in the Arc of Triumph
Unlock Enja
Defeat Marcellus at Mt.Hiei
Reach and Save the soldier at the sewer
Unlock Raisen
Defeat Ranmaru at Honnoji temple without broke any panel
Defeat Heihachi at Sakai port
Clear all nodes at Dark Realm of Undersea Temple
Defeat Ranmaru at Undersea Temple
Unlock Hyosai
Unlock Chigo
Defeat gertrude at Undersea Temple
Complete Michelle act at the Zoo with both hidden weapons collected
Defeat Guildenstern at Zoo labs
Clear all nodes at Dark Realm of MSaint Michel
Defeat Gertrude at MSaint Michel
Defeat Vega Donna at Azuchi Castle
Unlock Ultimate Whip
Clear all nodes at Dark Realm of Honnoji Temple
As Samanosuke cross the crystal room trap without taking damage
Defeat Nobunaga Oda
Complete the Genma Puzzle Space (Onimusha 2 Version) with 200 Oni Intelect
Complete the Genma Puzzle Space (Onimusha 1 Version) with 200 Oni Intelect
Complete the Genma Puzzle Space (Onimusha 3 Version) with 200 Oni Intelect
Collect all Tengu chests
Resolve and open all puzzle chests
Destroy Brainster in the Arc of Triumph in Critical Mode (Normal Difficulty or higher)
Defeat Marcellus at Mt.Hiei in Critical Mode (Normal Difficulty or higher)
Defeat Heihachi at Sakai port in Critical Mode (Normal Difficulty or higher)
Defeat Ranmaru at Undersea Temple in Critical Mode (Normal Difficulty or higher)
Defeat gertrude at Undersea Temple in Critical Mode (Normal Difficulty or higher)
Defeat Guildenstern at Zoo labs in Critical Mode (Normal Difficulty or higher)
Defeat Gertrude at MSaint Michel in Critical Mode (Normal Difficulty or higher)
Defeat Vega Donna at Azuchi Castle in Critical Mode (Normal Difficulty or higher)
Defeat Nobunaga Oda in Critical Mode (Normal Difficulty or higher)
Unlock Bishamon Sword
Collect all elemental Seals
Open all Michelle's special chests
Complete Stage 8 in Oni Target Practice
Complete all the lessons of the protective mirror
Complete all the special training lessons
Complete Heihachi's adventure
Unlock Kuga