I've always had a problem with motion sickness when palying FPS's. I thought I overcame my disability several years ago when I started playing Halo 2 and Call of Duty regularly without any problems. But last night I popped in Star Wars Dark Forces for PS1 and I almost lost it.
After 5 minutes of playing, I started to get real warm so I shut off the game but I kept getting sicker and sicker. After an hour or so, I had to lie down because my stomach was constantly churning. The rest of the night I felt like I was going to puke at any second. I managed to keep it down but even now I still feel a bit light-headed and queasy.
Is there any way of getting over this aside from giving up FPS's entirely? I've heard of over-the-counter medication that might help but that seems kind of excessive. It just seems to be a problem with older FPS games (Doom, Golden Eye, AvP) but I've had a some problems playing newer ones too like Half Life 2 and Red Faction.