It wasn't exactly profound so much as it was a sudden appreciation for just how deep the game had gotten its hooks in me.
The end of Persona 5.
I was sad because it was over, but not just because I liked the game, I've experienced that before with plenty of others. What I felt at the end of that game was something I'd never felt playing a video game before, and that was a sense of loss. I didn't just want to play more of the game, I wanted to spend more time with these characters. I'd gotten so attached to them, and so into the life sim aspect, that when the credits rolled, it felt a little like I lost my friends.
Now granted this was during covid, and I was quarantined alone, having not been able to see my actual friends in months. Burning through Persona 5 became my primary unwinding activity for a few months, and as I got deeper into it, I spent solid days with it. So it's fair to say I was in a very susceptible state of mind to attach myself to some characters.
But even without that, I think that game really hit something special for me that made me temporarily forget these weren't real people, and for a fleeting moment, I felt a profound sadness at their absence