Hmm.. I believe that I have experienced something similar to Omanes Alexandrapolites the Idiot. Seeing how half-life, an original game was supposedly awesome, i bought the game and wanted to play through it. However, after 15 minutes of playing it, i would start to feel nauseated and dizzy and had to stop for about 30 min or so before i started feeling normal again. This occurs every time i paly half-life which is the sole reason i am still at level one in the game right now... I have played plenty of old games such as the original diablo, and the original command and conquer game, but did not experience such effects