sarahandus, I urge you to try this game.
I loved it and may be unconsciously comparing other games to it since.
It was so dark and different and interesting!
They have a demo on the website you could try out
here to see if you can handle it.
I played this game 3 times in a week when it came out!
When it ends it gives you a rating of what you found and what you missed.
Documents, Clues, Hidden Clues, Story Secrets, and Easter Eggs.
I had to keep at it until I knew and found everything.
If you click on the forum link at the website you will find a wealth of info, the patches and the developer personally!
I've found I have to try the demos to see how some games affect me personally.
I didn't experience any sickness problems, although it helps to set the cursor to fixed and the mouse sensitivity to low in the options.
But the newer Sherlock Holmes games make me toss my cookies after just a few minutes and become unplayable.
Most others seem to handle those games just fine.
So I urge you to try the demo for motion sickness problems only, not gameplay. The demo happen very late in the game and could be confusing and frustrating. The full version eases you into the controls and navigation and the atmosphere. The demo just drops you in blind.
Like I said, I loved this game and am waiting for the sequel as patiently as possible!
I'd hate to see someone miss out!