the psx is just a dumb genre when it should just be old shool or 64 bit or whatever, ps1 style games have come up in the past decade and are to blame for this confusion
From what I’ve seen, this is a PS1 style DeMake made using Unity. Saying this, , plugging in a dualshock and running it with steam, on a crappy monitor gives a pretty low quality (in a good way) visual experience that got the nostalgia juices flowing for an era I never experienced.