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