Here is the full list of all 50 Toukiden 2 achievements.
Pray 20 times.
Destroy all of an Oni's body parts 50 times.
Destroy 500 Oni body parts.
Slay 100 large Oni.
Complete 30 quests.
Become friends with a Tenko.
Clear Chapter 2.
Slay 5 large Oni without taking a break.
Raise your bond with one of your allies to its maximum level.
Clear Chapter 1.
Bathe with someone of the opposite sex in the Pool of Purity.
Slay 1,000 small Oni.
Upgrade all of the Boosts available with a single Mitama to their maximum level.
Unlock all of the Demon Hand functions available in "Toukiden 2."
Purify the Otherworld for the first time.
Destroy all the body parts of a large Oni.
Be officially anointed as a Slayer.
Equip Demon Hand for the first time.
Encounter an Oni.
Obtain all of the achievements in "Toukiden 2."
Clear Chapter 3.
Clear Chapter 4.
Clear Chapter 5.
Clear Chapter 6.
Clear Chapter 7.
Complete Phase 6.
Complete Phase 12.
Clear all of the available missions in "Toukiden 2."
Complete all training sessions in "Toukiden 2."
Bring one of your companions on 50 missions overall
Fortify a weapon to its maximum level.
Obtain 100 kinds of weapons
Fortify a piece of armor to its maximum level.
Acquire 100 different types of armor.
Eat 20 meals.
Dispatch a machina 30 times.
Create all of the brain circuits available in "Toukiden 2."
Bathe in the Pool of Purity 50 times.
Unlock all of the Stamps available in "Toukiden 2."
Acquire a total of 1 million Haku.
Raise your bonds with all of your allies to their maximum level.
Slay all of the Oni available in "Toukiden 2."
Obtain all of the Mitama available in "Toukiden 2."
Synthesize materials 30 times.
Activate 300 Boosts.
Increase the Security Rating of all of the Ages in "Toukiden 2" to their max value.
Obtain all of the crests available in "Toukiden 2."
Obtain all of the inscriptions available in "Toukiden 2."
Complete 10 missions with every weapon in Toukiden 2
Complete 10 missions using every battle style in Toukiden 2