Interesting question!
I was just discussing issues that are going to arise as the games we play blur into our reality, and whether that will undermine our ability to make sense of what is real. My case is that money is 'not real', but it shows how a shared virtuality can contribute to rather than undermine our shared reality.
This answer is relevant, discussing Baudrillard, and philosophy of play like Huizinga, and some considerations about the nature and purpose of art: Video games as new art
I am kind of fascinated by how computer games and open-world ones especially, are interactive media. It shifts considerations. But as a basis, it's important to consider the history of media philosophically
Debord's The Society of the Spectacle is an interesting lense. I am a big fan of Durkheim and his ideas about anomie and social cohesion, through collective enactment of shared attitudes towards values.
This answer talks about epistemic contention: Need help with this paper on epistemic justice
This answer discussions cultural variance in interpreting the self: How do Chinese and Japanese Buddhists perceive people? And the enduring significance of Confucianism: Why is Confucianism considered a brilliant philosophical school of thought?
Monster Theory is a pretty interesting lense, "viewing the monstrous body as a metaphor for the cultural body, ... consider beasts, demons, freaks, and fiends as symbolic expressions of cultural unease", discussed here: What did Nietzsche mean by monsters and the abyss? I'd look to this to understand why we find some monster-archetypes far more persistent, and unsettling, than others. The nature of villains, baddies, and their evil or madness, is very interesting. The great ones, we find disturbingly sympathetic. So considerations of evil, discussed here: Does philosophy have a dark side?
There's a thing about the origins of the Superhero genre, and Jewish philosophy, dilemmas, and the golem. See eg The Golem and the Jewish Superhero. In this age of instant access to limitless information, it's interesting to note how we are being thrown back to the idea our key skill as humans is good decision making and dilemma solving, from a scientific picture where that is left aside in favour of gathering information. Discussed here: Wisdom and John Vervaeke's awakening from the meaning crises?
I was looking at philosophically intriguing computer games to brighten your day, which mentions in Assassin's Creed: Odyssey there's an extensive storyline with Socrates, where you face philosophical dilemmas.. Superhero stories tend to focus on dilemmas, which we can understand as exercising that faculty in ourselves, and in games that can be far more participatory. In-game Trolley Problems and so on, can make us investigate our impulses and moral reasoning and their consequences - and there is a game 'Trolley Problem, Inc.'; see Guardian review. There's great potential for looking at Game Theory interactions too, like iterations of equivalents to the Prisoners Dilemma.
It's interesting to reflect on Mark Fisher's point, "it is easier to imagine an end to the world than an end to capitalism", in relation to the many dystopian and very very few utopian visions of the future in computer games.
There is research on the impacts of first- to third- person perspectives, eg First Person vs. Third Person Perspective in Digital Games: Do Player Preferences Affect Immersion?, The impact of video game character viewpoints and task on perceptions of cognitive and similarity identification.
I suspect the philosophical work specifically on what you ask, is quite niche and very modern. I searched for 'Philosophy + Now + computer + games' and that brought up lots of things, you can only view 4 a month without a subscription though. I am very interested in this area, and I hope you will report back on what you discover as you go into researching it.
