eyeless jack

(Plot from the game)
You went with a friend to his house; he'd been gone for 10 years. He asked you to look for his key. You found it and helped him carry the boxes. You talked with your friend and went to bed. Two days later, at 3:40 a.m., you heard a rustling sound. You approached your friend, and the lights in the entire house broke. You went outside with a flashlight to turn off the switch, and suddenly someone in a blue mask startled you. You ignored it and went to bed. The next day, you came to your friend's kitchen, and he said

• Good morning...! Stop... brother, what's wrong with you...?!
  you asked
• What is it?
  a friend shouted at you
• Go look in the mirror!
  You looked and... Your cheek was scratched and black liquid was flowing out of it. A friend called an ambulance and the doctor told you:
• Everything seems fine, but... you've lost one liver...