Don't worry, imma not gonna wax poetic, i'm talking about the old school "Morality Meter" in games, you know, karma points, lightside/darkside, good/evil, paragon/renegade, etc?
And how it often twisted your character's appearance later on as tech improved?
Allow me to postulate that the world changes instead of you based on your good/evil deeds, buuuuut turn that on its head.
Like the more of an abhorrent bastard you are, the world around you becomes more and more saccharine sweet to your eyes, everything is so bright and beautiful and...are those flowers singing? Like oldschool disney had an angry LSD lovechild with teletubbies.
Or "Meet the Pyro".
Of course the opposite is true if you're goody goody, the world becomes increasingly dingy and bleak to the point where it runs the risk of being sued by both arnish kapoor and games workshop for being too dark.
now throw in a "streamer mode" in all of that. where you, the player don't see those changes in the world... but your viewers do.