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