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