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