Take Mission Space, it creates the G forces by spinning you in a big circle, but the screen that you watch in the capsule is giving you the sense that your moving in a forward motion. Your eyes are telling your brain that your moving forward, but your body is telling it that you're moving in a circle, as a result of the conflict, yup, your stomach says, this is not good.
The non rotating version takes away one of forces and everything is fine.
The non rotating version takes away one of forces and everything is fine.