Here is the full list of all 19 Shrouded in Sanity achievements.
Self defence...
Not in the position to negotiate.
First time for everything...
Subdued the 1st Knight.
Subdued the 2nd Knight.
Subdued the 3rd Knight.
Subdued the 4th Knight.
Visions from the new world.
Nothing is ever free.
Unfit to rule. Doomed to repeat it.
True conclusion...
Close to the truth.
Bad idea...
Terrible idea!
Harbinger of things to come...
Challenge accepted
Congratulations, well done!
May your bloodthirst be satiated...
Had enough yet?