Here is the full list of all 15 Clam Man achievements.
Abuse a jellyfish.
So it was all your work!
I’m Clam Man, and this is my favorite ending in the game.
You literally just killed a guy. You monster.
Remember? From the hallway scene?
Oh no! He can’t hear us! He has earpods in!
Crack down on crime!
Behold! My stuff!
Go get your money back, you jobber.
Don't worry, it's perfectly Safe.
Pay tribute to the greatest band of all time.
Immediately start doing what you said you wouldn’t.
Get fired and feel bad about it.
Because that's great writing.
The customer is always right. And annoying.