Here is the full list of all 29 Salt achievements.
Hunt and kill The Alpha Stag.
Obtain a set of Turtle Armor.
Hold at least 50 lore books in your inventory.
Obtain over 10,000 gold.
Complete the main quest line.
Fish up a Dragon Fish.
Obtain a Hightop Bloom Flower.
Decorate your boat with a painting.
Craft The Maiden.
Obtain a legendary item.
Dig up some buried treasure
Purify the Ancient Skull.
Place a flag on a very tall mountain.
Kill the Spider Queen.
Craft the Pardon Pusher.
Sail past the 1000 unit mark.
Fish up a Gigantic Mouth Seabass.
Defeat the Dark Guardian
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.
Obtain the Lucky Fisherman's Hat.
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.