The role playing game Kult, and the Chaosium game Call of Cthulhu are both examples of this. But as you go insane you also reality as it truly is, and not the illusion or lie that most humans comprehend as reality. Or, you go insane by seeing reality.The universe is a much darker, more terrifying reality that we cannot cope with, so ‘sane’ people have developed brains that filter or distort it more to what we feel safe with, I used to adapt role playing games by using a GURPS system. I led many ‘crossover’ games, I really like your system and appreciate all the work you put into it. I haven’t conducted any games since 1999 and not sure if my library and sources are obsolete. But you have developed an excellent system.