Here is the full list of all 36 Adventure Time: Pirates of the Enchiridion achievements worth 1,000 gamerscore.
Pull the plug!
Unlock all Achievements in the game
Beat Uncle Gumbald in battle - hidden
Complete all side quests
Get Finn to level 10
Get Jake to level 10
Get Marceline to level 10
Get BMO to level 10
Inflict more than 1 bunk effect on to a single enemy
Light all the braziers in the Fire Kingdom
Use all the pirate lookouts
Take all the penguins to the tree house
Beat the Fire Giant in battle
Dock at all the islands
Beat the Mother Varmint in battle
Find the snail
Use BMO's Analyze.exe
Restore light to the treasure tree
Free the caged Mushroom people
Unlock a gate with BMO
Revive a hero
Beat Fern in battle
Open 15 treasure chests
Win your first fight against a higher level enemy
Beat 50 enemies in battle
Fall in to water more than 10 times
Destroy 10 Sea destructibles
Destroy 250 land destructibles
Complete your first side quest
Buy your first item from the shop
Use a pirate lookout
Destroy 50 land destructibles
Win your first sea battle
Overskronk 4 enemies in a single battle
Pass the first Interrogation
Fish out 25 items from the sea