On many of the walls you will find "If there is a God, then why has he let me die" which is an exact quote from the song "Hallowed Be Thy Name" by Iron Maiden. Also, on two walls near the beginning of the game, the words "This is a world that has gone very wrong for me", which is also from the same song ("In a world that has gone very wrong for me"). This is difficult to read because its written in smeared blood.