Here is the full list of all 29 Salt achievements.
Fish up a Gigantic Mouth Seabass.
Purify the Ancient Skull.
Craft the Pardon Pusher.
Fish up a Dragon Fish.
Get the Jungle Skimmy boat.
Obtain over 10,000 gold.
Hunt and kill The Alpha Stag.
Decorate your boat with a painting.
Map 100 islands at 100% accuracy.
Obtain a set of Turtle Armor.
Defeat the Dark Guardian
Craft The Maiden.
Hold at least 50 lore books in your inventory.
Obtain the Lucky Fisherman's Hat.
Place a flag on a very tall mountain.
Kill the Spider Queen.
Obtain a legendary item.
Obtain a Hightop Bloom Flower.
Dig up some buried treasure
Sail past the 1000 unit mark.
Obtain the Loreman's Lofty Axe.
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 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.