Full list of all 48 DREDGE achievements. It takes around 15-20 hours to unlock all of the achievements in the base game on Windows.
The base game contains 40 achievements, and there is 1 DLC pack containing 8 achievements.
Find a use for the relics.
Obtain all other achievements.
Throw it back.
Catch all aberrations.
Catch all known species of fish.
Visit every dock in the game.
Solve all fish shrine puzzles.
Use Mixed Bait to attract 3 different species to a single spot.
Relinquish the Necklace.
Complete all side quests. One way or another.
Research all rods.
Banish 10 threats.
Spot a fish of each category through your Spyglass.
Install equipment into every slot on your ship.
Research all engines.
Use Atrophy on a fishing spot a long way away.
Give up the Pocket Watch.
Have a combined fishing speed of 200%.
Sell a total of $1500 worth of trinkets.
Have a combined engine speed of 75kn.
Entrust the Ring.
Have a combined light strength of 3000 lumens.
Research all pots.
Upgrade to the 4th tier hull.
Catch 250 fish using rods.
Catch 100 crabs in crab pots.
Research all nets.
Traverse a long distance using Manifest.
Upgrade to the 3rd tier hull.
Catch 150 fish in trawl nets.
Discard 25 fish.
Keep your Haste burn meter above 50% for 10 seconds.
Upgrade to the 2nd tier hull.
Surrender the Music Box.
Sell a total of $2500 worth of fish.
Deliver the Key.
Deplete a total of 25 fishing spots.
Hear a Foghorn echo.
Complete the introduction quest.
Have a full cargo.
Catch all aberrations in The Pale Reach.
Catch the Colossal Squid.
Catch all known species of fish in The Pale Reach.
Finish the main quest in The Pale Reach.
Have 5 ice blocks in your cargo.
Finish all side quests in The Pale Reach.
Equip the Icebreaker.
Feed the Narwhal.