Sure.
I mean, it includes tons and tons of things that have all been classified as it, but I personally don't really see this desperation to be validated as "art". It's all up to interpretation in the end really, and sure, if you go by the general view of course it is, it includes music and visuals, the soundtrack and aesthetics are a big part of loads of games and they are art, aren't they?
So why would it not be? What is the definition of art? Or more importantly your definition?
I don't know. I'm an artist and I really don't know how to make my own definition, because most art pieces I do are just like "oh, I want to do like this" and I do it, but some people read into it so much that I feel a bit awkward since I didn't mean for it to have some deep message behind it. But even though I don't have it, other people might interpret it like I do, so is it validated or not?
I'm just saying fuck it, believe whatever you want.