[lukastyrychtr]

Generally speaking, yes, they do. But the answer is, as always, more complex than that. Firstly, some types of games (text adventures, MUDs etc.) are more favorable for enjoynment by visually impaired people. When it comes to the traditional genres, it usually ends up being an issue, e. g. the mainstream games more often than not are not playable, but there's an entire genre of games which do not rely on visual information and instead use audio (usually stereo + might be some HRTF tricks).