Here is the full list of all 38 SAMURAI MAIDEN achievements.
Acquired all trophies.
Defeated a total of 15,000 enemies.
Achieved S on all battlefields across all difficulty levels.
Collected all memory fragments.
Enhanced all of Komimi's weapons to the max level.
Cleared the Main Story on Demonic mode.
Enhanced all of Hagane's weapons to the max level.
Enhanced all of Iyo's weapons to the max level.
Cleared the Main Story on Hard mode.
Enhanced all of Tsumugi's weapons to the max level.
Cleared all of Hagane's Bubble Pockets on Normal mode.
Unlocked all memories of Hagane.
Cleared all of Komimi's Bubble Pockets on Normal mode.
Cleared all of Iyo's Bubble Pockets on Normal mode.
Defeated a total of 5,000 enemies.
Unlocked all memories of Iyo.
Unlocked all memories of Komimi.
Cleared the Main Story on Normal mode.
Defeated the Demon Lord.
Performed Devoted Heart with Iyo.
Performed Devoted Heart with Komimi.
Performed Devoted Heart with Hagane.
Defeated a total of 1,000 enemies.
Used a Decoy.
Defeated Shingen Takeda.
Used a Bomb.
Defeated Kenshin Uesugi.
Activated Komimi's Ninjutsu.
Used a Mine.
Used a Recovery Potion.
Activated Hagane's Ninjutsu.
Unlocked a memory in the Album.
Used a Timed Bomb.
Activated Iyo's Ninjutsu.
Enhanced a weapon for the first time.
Activated Komimi's Ninja Skill 1, Ice Smash.
Activated Iyo's Ninja Skill 1, Tsubame Fireworks.
Activated Hagane's Ninja Skill 1, Lightning Fist.