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