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