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