I’ve occasionally seen threads about this and wanted to contribute my own. The game Fran Bow (it’s an indie point and click game-warning it is horror genre and for me personally was highly triggering just because of its relevance to my symptoms) to me just so intensely captured a lot of my experiences with mental illness. Not exactly in the physical portrayal of it (the character-a child- has very vivid visual hallucinations) but in the emotions attached and the nature of the evil side of her psychosis that torments her. I feel like I’ve never found a game or movie that so strongly portrayed the feeling of despair and helplessness that can come when you’re being constantly tormented by things that the world tells you isn’t real. Furthermore the game does a great job of blurring reality so much (ie constantly giving evidence that the whole experience is psychosis while also giving evidence that it may not be) that even the player can’t tell what is true and what isn’t and I think that was a good portrayal of how people with psychosis feel too.
It was a very good game in my opinion. It also delves a little bit into the history of mental illness treatment. I won’t go into it much to avoid spoiling.