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