Here is the full list of all 65 Obenseuer achievements.
Find a way to burn money
Complete the first tenement upgrade
Upgrade all apartments to at least level 1
Upgrade all apartments to at least level 2
Upgrade all apartments to at least level 3
Upgrade all apartments to at least level 4
Gain access to all floors
Upgrade all utilities to at least level 1
Install the electricity in the tenement
Install the plumbing in the tenement
Install the heating in the tenement
Rent an apartment to someone
Half of the apartments are occupied
Every apartment is occupied
Enter Obenseuer
Kill the duck
Die of fungal disease
Get rid of fungus
Enter the Other Side
Get 1000 RM
Get 10000 RM
Get 100000 RM
Get to the Bergmann tunnels
Obtain Polonium-210
Get addicted to ducks
Cure addiction to ducks
Get rid of alcohol addiction
Get rid of smoking addiction
Get rid of mushroom addiction
Get maximum alcohol addiction
Get maximum smoking addiction
Get maximum mushroom addiction
Recover from all addictions
Max out all addictions
Raise farming skill to level 10
Raise brewing skill to level 10
Raise distilling skill to level 10
Raise carpentry skill to level 10
Raise mashing skill to level 10
Escape from prison
Get arrested
Serve jail time
Have a low bounty
Have a medium bounty
Have a high bounty
Get your debit card
Find blue mushrooms
Get low burglar points
Get medium burglar points
Get high burglar points
Raise lockpicking skill to level 10
Raise cooking skill to level 10
Raise machining skill to level 10
Raise paperwork skill to level 10
Raise manufacturing skill to level 10
Have absolute zero expectations
Have high expectations
Raise chemistry skill to level 10
Raise bribery skill to level 10
Survive a week in Obenseuer
Survive a month in Obenseuer
Survive a year in Obenseuer
Raise drinking skill to level 10
Die of radiation poisoning
Raise engineering skill to 10