edit: clarity
They're entirely placebos, so that might be why.
Wolfenstein FOV was way too low, something like <70, which caused that feeling sick, try to get games where you can set you FOV to 85+ and it made a world of difference. motion sickness =gone
She also got motion sickness until she turned on the Apple dots.
It might do. I recently had a bout of nostalgia and wanted to play GTA4 again (as a Uni student I only played part-way through without being able to finish the story). I ended up buying a used PS3 to play it, but I couldn't get through 30 mins of it before feeling nauseous. The low FPS on the PS3 just wasn't sitting right with me.
I ended up getting an Xbox Series S. The constant 60fps on this console was a game changer for me.
Visual complexity ups the ante. Think of walking through a grocery store with high shelves filled with a variety of products -- this can cause migraine in some people and, to a lesser extent, also affects vertigo. So you may not want to play, say, grocery store simulators (although I have no idea who actually does anyway, why are those things popular!?).
With FPS I can clearly tell which ones are going to be a problem. Anything where the whole viewport moves at all rapidly is an issue, especially if it is something other than a straight scroll. But I'm fine with pretty much anything where my cursor moves within the viewport, the viewport only scrolling when I reach the limits.