-Gamma should now save after adjusting the slider, closing the game and re opening the game. (Note: when you adjust the slider it will auto save the gamma you have set. After you save and exit, IF you re-open the video settings the slider Will appear as if it in the original position. HOWEVER! it has saved! and does NOT need to be re-adjusted. if you were to close the game and re-open it the slider will appear in the position you set it in. Basically Set it and forget it.)