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