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