Full list of all 23 Going Under achievements.
The base game contains 20 achievements, and there is 1 DLC pack containing 3 achievements.
Save the World?
Kill a Hungry Box.
Unlock all Skills.
Defeat Vested Marv.
Obtain Hover Hands' Share.
Complete Swomp's "mentorship".
Obtain Hustlebones' Share.
Complete Kara's mentorship.
Obtain The Caffiend's Share.
Go under.
Complete Tappi's mentorship.
Complete Fern's mentorship.
Complete Ray's mentorship.
Get cursed 13 times.
Obtain The Toxic Mask.
Open 100 delivery cubes.
Obtain The Grim Ledger.
Obtain The Mana Press.
Meet your coworkers.
Kill a power loader with the Exit Strategist skill.
Win a run in Impostor Mode.
Complete The Impostor's final test.
Complete the Rolodex