Here is the full list of all 12 Dark Lord Demo achievements.
Conquer your first kingdom!
Get a conflict between your advisors
Now the Manor belongs to the Cat
Yes, you definitely need a zombie wyvern. Totally safe!
Make 100 choices
Meet the Merchant
Learn how to manage your manor
Flog somebody 10 times
Upgrade the Cat's influence level to 10
Delicious cupcake and not poisoned at all
Discuss your health with one of the advisors
Why did you drink all these potions?