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