*nods*So, SPOILER ALERT - you know how in Witcher 2, they split the plot into two paths at a certain point, right?
Well, how about if you go cyberpsycho, the game doesn't tell you. At all. In fact, your game splits off from the main one and goes along the Cyberpsycho Plot Path, until you are caught and cured or, more likely, killed.
And while you are in the grip of cyberpsychosis, you can and will do all sorts of horrible things for what seem like perfectly good reasons. Only, it being psychosis, a distinct break from reality, you are seeing the wrong things and your actions only vaguely resemble your real actions. Until your inevitable end arrives and suddenly, briefly, you can see reality again.
You get images of what was really happening - setting fire to your building, cutting your flesh with glass and steel, strangling your loved ones - this whole time while you thought you were chasing bad guys or saving maidens or whatever.
Only at that point does the game let you know you have,in fact, been insane for the last ten hours of gameplay.
Running with this idea: so far, we've discussed all sorts of fun ways to keep the player in the dark that they're slowing approaching / gone over the line (more rational dialogue choices becoming hidden / progressively more and more combative / violent dialogue options being the only ones,) random "threats" happening in public (because hey, Night City is a dangerous place, right?...), etc.
I think it'd be neat if there were secretly hard-coded areas around the city that triggered a wave of "hostiles" coming in to attack the player. At first, it'd be a few, but rapidly, they'd be pouring out of the woodwork.
If the player manages to survive, they can tune in to news reports later (which would be mostly pre-rendered scenes, and using the player's current character model) and they can see themselves going on a rampage.
If the player is taken down, they can watch another nice (mostly pre-rendered) scene, seeing their character going on a rampage at the mall, or at the train platform, or gunning down a schoolbus full of nuns, while C-SWAT takes them down.