Here is the full list of all 39 Paw Paw Paw achievements.
Complete the story mode
Defeat King Bunnylord III
Defeat 1,000 enemies
Unlock Domba
Break into the castle
Unlock 50 weapons
Die 100 times
Ride the Skywhale
Defeat Warden
Drink 100 potions
Survive The Pit
Defeat The Dark Knights
Get into the city
Reach level 10 on a character
Roll 1,000 times
Hit 10 innocent bystanders
Defeat Worm
Defeat Aegel
Skate off the avalanche
Defeat Baby God
Unlock Welu
Defeat Grillz
Defeat Gragal
Unlock Obek
Reach level 5 on a character
Defeat Big Bad Pug
Unlock Doggu
Defeat Root
Play co-op
Push the payload
Unlock 20 legendary weapons
Recruit 50 companions
Spend 500,000 foods
Have 100,000 foods
Throw 100 bombs
Ride 100 mounts
Reach max level on a character
Break 500 chests or barrels
Play co-op with 4 Players