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