hello everybody well i got a problem with my monitor (looks really dark) i was wondering how can i change the gamma and brightness of the game need help with this thanks

If you can't adjust your monitor you could look for gamma/brightness settings of your graphic's card driver. For example you can adjust gamma and brightness if you have an ATI graphics card using original ATI drivers.
It probably also works with NVIDIA cards with proper drivers.

yeah i already did this but when I enter to the game it goes darker again i dont what to do :(

Does it happen on the menus and the in game graphics as well?

yeah the whole thing

Try plugging in another monitor to see if it's a hardware problem or a software problem.

Agreed with Run. Also, try adjusting the brightness and contrast settings on the monitor itself. Your monitor possibly stores a different brightness/contrast configuration for each resolution/frequency mode, and you may be using a different resolution from the one you use on your desktop.