Brightness problem

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Hey! Can you please tell me if I can somehow change the brightness of this game? My new win update made my laptop unable to change the brightness . I just love this game, but I have sensitive eyes, when I play it my eyes start to ache terribly. I could not find the brightness settings, this game just doesn't have them. I don't know why.. I have tried to download some softwares which work perfectly but not during this game. the brightness is on 100%.

[Jeff Stephen]

It's listed in the game as gamma.

[♥♥♥♥♥♥♥]

Thanks man. i finally found it. i had exclusive fullscreen. I changed it in fullscreen and everything happen :)