Here is the full list of all 31 Pixel Piracy achievements.
Have 5 of your crewmates wear diapers at the same time
Unearth an epic buried treasure
Dig up 10 buried treasure chests
Defeat all the Legendary pirate ships
Kill a total of 1000 enemies
Visit a panda island
Loot a total of 10000 gold
Defeat a legendary pirate
Capture 50 animals
Pick a fight with a legendary pirate
Add a pirate flag to your ship
Have a pirate turn hostile due to low morale
One of your pirates dies while using Kaboom
Find a stranded hobo
Capture an animal to be your pet
Have 10 or more pirates on your crew
Horke the Flatulent poops
Die for the first time
Accept a bounty quest
Have at least 5 poop on your ship
Kill a hobo
Have both Vitali Kirpu and Alexander Poysky on your ship
Capture an enemy ship
Plunder an enemy ship
Have a seagull poop on your ship
Find a treasure chest and open it
Visit an island with no town
Set sail for the first time
Visit a tavern
Check out the Main Menu credits
What was that? Did we just travel to hell?