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