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