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