I always felt video games exaggerated the effects of mental illness for plot convince. What I mean is that when someone hallucinates, its sorta there, and mostly just a foggy memory. Rarely, if ever, do people actively hallucinate legions of demons, blood towers falling from the sky, the streets turning to hell's highway, their dog is not a 80000ft tall lava monster, they're punching something in the hallucination only to realize they're just sitting on the couch and none of that ever happened. Most of us just call that dreaming. And we're expected to believe these people are actively interacting with their hallucinations? The cyber blood rape daemon cuts them with its rage sword, and their body actually bleeds? They're physically hurt from the phantom sword and actually die? Why don't they ever just stop hallucinating instead? I die in dreams all the time, yet here I am, the world's best ghost typist.
Mental illness in games always seems so...interactable, so vivid and real. Not that mental illness isn't real, but someone with depression tell me, every time you look outside is it raining? It is literally always night, and raining? Do you, literally, never see the sun anymore and actually feel phantom raindrops on your skin when you step out? Because in video games, nighttime raining is shorthand for depression.
I've heard of mentally ill people who think others are monsters in disguise, sure. Lizard people, grays, werewolves, the works. Sure, good, great. Hell, some people even believe X and Y can be possessed!
But never have I heard of someone having a throwdown duel with Satan over the blood river of eternal pain, having lasting physical injuries from said duel, only to realize they've been cooking gumbo the whole time...