@ nathal , What Windows shows for available resolutions is usually determined by what the video card can do versus what the monitor will show. There may be resolutions the video card can produce but that the monitor doesn't like, they get removed from the list. Also not in the list are any monitor resolutions that the video card doesn't support. That's assuming Windows has ID the Monitor correctly. The game on the other had is going to try and cover as many basses as possible. It's likely going to have some normal 4:3 screen sizes and some wide and super wide screen resolutions. If you had multiple monitors with eyefinity for example you'd need a super wide screen resolution. By default it likely just lists all the resolutions it can use so you will end up with some that won't work on your setup.