Here is the full list of all 26 Braveland Pirate achievements. It takes around 15-20 hours to unlock all of the achievements on Windows.
Rejected all the assassination contracts.
Have won 150 battles.
The Great Reaper defeated.
Game completed without using the easy level of difficulty.
Game completed using only the hard level of difficulty.
All the bosses defeated.
Looted all treasure chests and hidden caches.
Fulfilled all the assassination contracts.
All pirate tricks learned.
Visited all islands.
Have answered all the questions of the sages.
Jarl Erik defeated.
Obtained the old man's artefact in the sea.
Have overcome 25 random encounters in the sea.
Six pirate tricks learned.
Fought through all dungeons and arenas.
Sir Rodrick defeated.
Rejected the Iron Bank's offer.
All four equipment items on.
Davy Jones defeated.
Bought an item for hero.
Looted 7 treasure chests and hidden caches.
Pirate trick learned.
You defeated the army without losing a single warrior.
Cabin boys have joined you.
Page on Facebook or Twitter visited.