Here is the full list of all 39 Onee Chanbara ORIGIN achievements.
Acquired all other Achievement
Investigated all of the Goddess Statues that appear in the story
Reached level 99 with Aya
Reached level 99 with Aya and Saki
Went Xtatic 100 times
Went Berserk 100 times
Obtained all rings
Reached level 99 with Saki
Cleared Infinite Survival floor 51
Cleared Infinite Survival floor 31 without having taken any damage
Cleared Infinite Survival Mission floor 23 without having taken any damage
Obtained all consumable items
Cleared the story difficultly "Beast"
Completed 5 quests
Cleared the story difficultly "Berserk"
Performed 10 consecutive successful parries against a single boss
Performed 5 consecutive successful parries against a single boss
Cleared Infinite Survival floor 8 without having taken any damage
Cleared the story difficultly "Hard"
Equipped two characters with the same type of ring
Acquired 1,000,000Z
Cleared all Chapters in the story
Defeated Lei (Berserk) in the story
Defeated Eva in the story
Defeated Oboro (Xtatic) in the story
Defeated all types of awakened zombies
Defeated Anzu (Berserk) in the story
Used Cool Finish a total of 100 times
Defeated Death Bear in the story
Defeated Ubie's second form in the story
Defeated Lei in the story
Swapped with Saki for the first time in the story
Defeated Saki in the story
Went Xtatic for the first time in the story
Defeated Sayaka in the story
Defeated Devda in the story
Went Berserk for the first time in the story
Performed a successful parry for the first time
Cleared Chapter One of the story