Here is the full list of all 31 One Dog Story achievements.
Piece of cake
Everything in moderation
Huh, am I still alive?
Albert has been executed
The Rat King has been destroyed
Abyss-mal fall
Jet pack found
Robot X01 has been destroyed
The Keeper has been slaughtered
Brotherly Love
Got smashed to smithereens
Hoverboard found
The Needler is neutralized
Hydrophob is dead
Bonus weapon
High jump
The Keeper of the Underworld has been annihilated
Gobbled up
You’re on your own
Rest In Peace
Restless mind
Cthulhu has been slain
The King of Slugs has fallen
You only live once
Let’s play baseball
I’m the boss here
all collectables have been found
Yay!
Be right back
Not enough air