Jazzpunk for me at the default settings. Something about the FOV, the mouse smoothing and the lack of a crosshairs/static point on the screen made it playable for about 45 minutes at a time before it was too much. Felt sick to my stomach and head for hours after, wasn't until I looked up suggestions for settings to change to reduce the effect before it became tolerable. Still feel a bit woozy looking at screenshots or thinking about my time with the game.