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