This is a phenomenal game. Keeping things short, it has: 1. A vast, open, and interesting world. 2. Good graphics (for it's era), that still look decent today. 3. Solid (albeit dated) gameplay mechanics that are still fun and interesting. 4. An extensive modding community to improve the above and add tons of additional content of every conceivable variety. My only hitch with GOGs version of Morrowind is that it doesn't come packaged with the video files that the original installer ran from the CD. I keep getting a brief (not gamebreaking) error message every time I start, but all else runs as smooth as can be.
I downloaded this on Windows 7 (which GOG has claimed it to be compatible with), and it freezes every few minutes, making it completely unplayable. I tried the suggestions on the support page, none worked. I tried some suggestions found on other websites, as well as tinkering with the settings myself, and none worked. It is COMPLETELY UNPLAYABLE on my computer. It is the only game I have ever had an issue playing on this computer, too.
