Here is the full list of all 40 Bitardia achievements.
The base game contains 37 achievements, and there is 1 DLC pack containing 3 achievements.
Take care of the hospital
Take care of the bank
Return anon's debt
Finish the "Missing part" quest
Finish the "Fifth wheel" quest
Finish the "Winter is coming" quest
Finish a halloween-quests
Beat anon in cards
Agree to work on Abu
To die, refusing to work on the Abu
Finish the "Hotline Bitardia" quest
Get to jail after talking to police
Get to jail after entering the police station
You didn't accept the note-finding mission
Get some cash on arena
More than 100 killed on arena
Get to jail while taking the camera
Rob the caravan
Explode the building
Kill anons on the first mission
Finish the "Fifth Column" quest
Buy a pillow for anon
Take the guard quest
Kill cancer on the first mission
Served a term in prison
Get arrested for spoiling the stand
Finish the "QT 3.14" quest
Break out of prison
Get to jail after showing the video
Rescue the hostage
You have finished the note-finding mission
Take the builder quest
Kill Cancer on the first mission
Pick Cancer Mask
Pick Anon Mask
Agree to work for resistance