Thought it was an adaptation from the game...
When I saw the title, I thought "wow, Sanitarium was one of my favorites Point and Click adventure games on the PC, I would love to see it on screen", but no, it's not.
Unfortunately, I say, because the game is worth adapting to a series or a film, it has a great story.
"Today I'm a stump, but once I was a Black Knight! None shall pass! I'll bite your leg!!"