Here is the full list of all 30 DUSK achievements. It takes around 15-20 hours to unlock all of the achievements on Windows.
Neutralize Chomper
Watch the credits to the end
Earn the 'Completionist' award in every level
Find Lavender's secret
Pick up a bar of soap in each level
Reach E3MS
Find 'Wife of Intoxigator'
Reach E2MS
Find Dopefish
Kill Intoxigator while intoxicated
Reach E1MS
Find Rachael's secret
Earn the 'Completionist' award
Use cheats
Earn the 'Low Tech" award
Beat par time in a level
Get past wave 20 in Endless Mode
Get past wave 10 in Endless Mode
Get past wave 5 in Endless Mode
Kill an enemy by spinning your weapons
Complete all three episodes
Complete episode 3
Earn the 'Pacifist' award
Complete episode 2
Telefrag the Guardian
Beat a level on 'Duskmare'
Complete episode 1
Earn the 'Untouchable' award
Find a "You aren't supposed to be here go away" sign
Open Duskworld