Hellblade: Senua's Sacrifice is a first person game that is a first of its kind in how it unwraps how we endure psychosis. The developer of the game is Ninja Theory and the game itself has accumulated dozens of awards. During the development of this game they worked closely together with people who had experienced or were experiencing psychosis and the end product is fantastic.
The game really captures the dark and light moments of psychosis where you see scary images and hear a booming dark voice during dark times and when you experience lighter ecstatic times. The contrast between emotional states is very accurately represented, so much so that I would not recommend you to play this game if you are recovering from or experiencing psychosis currently because "Yes! It's that realistic". Moreover, at some points of the game you have to sword-fight these possessed Viking men which I assume are a figment of her imagination but these parts are a welcome addition to the continuation of the game. Here's a video I captured while fighting some of these Vikings.