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.
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.
Davy Jones defeated.
Sir Rodrick defeated.
Jarl Erik defeated.
The Great Reaper defeated.
Game completed without using the easy level of difficulty.
Game completed using only the hard level of difficulty.
Bought an item for hero.
All four equipment items on.
Six pirate tricks learned.
All pirate tricks learned.
Visited all islands.
All the bosses defeated.
Have overcome 25 random encounters in the sea.
Have won 150 battles.
Fought through all dungeons and arenas.
Fulfilled all the assassination contracts.
Rejected all the assassination contracts.
Have answered all the questions of the sages.
Obtained the old man's artefact in the sea.
Looted all treasure chests and hidden caches.
Rejected the Iron Bank's offer.