Here is the full list of all 47 ONE PUNCH MAN: A HERO NOBODY KNOWS achievements.
Earn every trophy.
Reach the maximum Player Level.
Get promoted to Hero Rank Class S.
Reach Player Level 50.
Reach the max level for the monster battle type.
Clear 100 or more missions.
Clear Chapter 11.
Clear Chapter 10.
Clear Chapter 9.
Obtain 30 or more skills.
Deepen bonds with ten heroes.
Equip a Super Killer Move and use it in battle (tutorial excluded).
Clear Chapter 8.
Obtain 150 or more avatar parts (accessories excluded).
Deepen bonds with five heroes.
Clear Chapter 7.
Get promoted to Hero Rank Class A.
Obtain 30 or more Killer Moves.
Use a boost item for the first time.
Clear 30 or more subquests (tutorial excluded).
Clear Chapter 6.
Clear Chapter 5.
Reach the max level for the psychic battle type.
Deepen bonds with a hero.
Clear Chapter 4.
Reach the max level for the machine battle type.
Obtain 50 or more pieces of furniture.
Clear Chapter 3.
Reach the max level for the weapon battle type.
Reach the max level for the power battle type.
Reach the max level for the standard battle type.
Unlock more than 15 characters for Free Battles with Team Rules.
Perform a Mode Change in battle for the first time (tutorial excluded).
Place furniture in your room for the first time.
Get promoted to Hero Rank Class B.
Clear Chapter 2.
Equip a skill for the first time.
Clear a mission from Hero Association HQ for the first time.
Make a purchase for the first time.
Change your outfit for the first time.
Set a Killer Move for the first time.
Clear a mission from a Hero Association branch office for the first time (tutorial excluded).
Land the first attack in battle for the first time (tutorial excluded).
Clear a subquest for the first time (tutorial excluded).
Perform a perfect guard in battle for the first time (tutorial excluded).
Clear Chapter 1.
Increase your Player Level.