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