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