I'm immune to VR motion sickness, but games without fake movement just feel so much more immersive!
"Tea for God" and "Unseen Diplomacy" are the only games I'm aware of that operate in this fashion, with "realistic" walking movement that doubles back on itself.
But I've played all three of these to death!
If you’re getting close to your IRL boundary, it sets up a rolling log as part of a puzzle. To stay on a real forward-moving rolling log, you have to walk backwards to maintain balance. So in context of the game, you’re convincingly moving “forwards” while in reality you’re walking backwards.
Pretty sure I took off the headset and geeked out at everyone in the house first time I realized what was happening.
I'd say because the gameplay is so elegantly simple, most people can do kinda sorta well right from the get go. It feels extremely natural with almost no set up apart from height, just incredibly intuitive and frictionless.
Synth Riders is quite nice as well, and so is Pistol Whip. Both are "on rails" rather than standing on a platform. I'm not sure if that's what makes Beat Saber slightly more appealing though.
Having played them, they were slightly disorienting at first but nowhere near as actual movement-based VR games.
Any game where your game-world movements don't match your real-world movements is what causes motion sickness.
It's as simple as that. If you're sitting in a mech, once the mech moves, you're likely to get sick, because you're moving in the game world, but not the real world.
There are ways to kind of fool your brain to make it work, but it's not 100%. For example, in Gorn, one of the movement options is to move an arm forward, then pull it back while holding the trigger, kind of like you're pulling the world. But if you alternate arms as you do it, your arms kind of simulate the swinging motion of walking, and that can be enough to drastically reduce or even eliminate the sickness.
I never used to have it, but in modern cars where accelerations are much higher and you're much more disconnected from the outside in terms of how much you can see and hear, it's almost a certainty. This is especially true on the backseat where it can also get fairly claustrophobic.
Brain expects movement (from visual stimuli) and doesn't feel any movement? Nausea. (VR sickness)
Brain expects stability (from visual stimuli) and feels movement? Nausea. (Sea sickness).
This is why when you're sea sick they tell you to watch the horizon, because if you watch the horizon, you can tell that the horizon is going up and down and your brain can correlate that to the motion.