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