Here is the full list of all 29 Salt achievements.
Craft the Pardon Pusher.
Decorate your boat with a painting.
Map 100 islands at 100% accuracy.
Purify the Ancient Skull.
Obtain the Lucky Fisherman's Hat.
Obtain a legendary item.
Obtain over 10,000 gold.
Craft The Maiden.
Hold at least 50 lore books in your inventory.
Fish up a Dragon Fish.
Obtain a Hightop Bloom Flower.
Obtain a set of Turtle Armor.
Hunt and kill The Alpha Stag.
Place a flag on a very tall mountain.
Fish up a Gigantic Mouth Seabass.
Dig up some buried treasure
Sail past the 1000 unit mark.
Defeat the Dark Guardian
Kill the Spider Queen.
Obtain the Loreman's Lofty Axe.
Defeat Draegan on Hardcore Mode.
Obtain the Golden Compass.
Obtain the Druid Spirit Idol.
Get the Jungle Skimmy boat.
Obtain all journal inks.
Defeat every boss in the game.
Complete the main quest line.
Complete every merchant quest in the game.
Knock fruit from a tree and shoot it with an arrow before it hits the ground.