It's an idea popular mostly with people in the tech industry. Of course, nobody in the tech industry knows anything about art, culture, or philosophy, because they all took computer science and never bothered questioning the neoliberal argument about the arts and humanities being worthless. So these techbros look at the world around them, and choose to explain it with the only works of art, culture, and creativity that they have ever paid any attention to: video games. These computer scientists have talked themselves into believing that the universe is basically like a video game, and that therefore the universe can only be fully explained by computer scientists.