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