Amnesia: The Dark Descent - The Things in the Night v1.2 HQ

You wake up on a rainy night to a bang on the door and thunder. You get up to see a letter in a puddle of water next to the door it's from your brother telling you that you need to come home... that dad has found something of much power and he has gone mad in science. He goes on saying that he read some of dad's notes saying he has found a way to live for ever and to bring the dead back to life to do his bidding. I fear for my life and mother's... The rest of the letter is too wet to read. You must travel to the village of Chupa and get in your dad's castle there and find out what's going on.