I believe there's an interview with the Alyx devs where they explain that a Portal game in VR wouldn't work as that game involves a ton of flying around with mo

I believe there's an interview with the Alyx devs where they explain that a Portal game in VR wouldn't work as that game involves a ton of flying around with momentum in heavy use. A common solution for motion sickness in VR is teleport based locomotion. I don't really see how Portal could work with teleport locomotion. There's also the issue that the appeal of portals being quite mind bending is satisfying on screen but it's probably rather jarring to go through a portal on a wall and instantly begin falling quickly to the floor. Alyx had issues with falling as well which is why you sort of float slowly when you fall off a ledge. On the other hand, while I think it's impossible, Valve would be the company to pull it off.