https://approductions.itch.io/lyssophobia

Lyssophobia [ lis-uh-foh-bee-uh ] 
- noun (Psychiatry): 
1. A pathological fear of going insane. 

Lyssophobia is a psychological horror game where you will:

• experience a constant sense of ominous foreshadowing; 
• know things without even knowing that you already knew them; 
• play a game to play the game inside the game; 
• recover the memories of your deeds; 
• understand what going insane without losing your mind is like...  and be terrified by the mere thought of it. 

This game is a physical manifestation of a horrifying and disturbing story revolving around the darkest meanders of the human psyche.
The screenshots on the game's page have carefully been chosen to contain as less spoilers as possible. 
A lot of twists and 4th wall breaking "special features" have to be experienced first-hand to be fully appreciated and enjoyed.
The less you know the better.