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