http://halo.xbox.com/en-us/Career/HaloReach/ServiceRecord#/Ca mpaign
All you need to know. Well actually, you should also know.. I'm Russian.
The first time I played Halo 1, I had no idea it was considered an old game. The classic graphics are beautiful, and I even prefer them to the graphics of modern games. The gameplay is amazing, the campaign is still difficult and challenging(Best played on Legendary), but not overly so. The story is original, and not over complicated, leaves a lot to think about. I prefer the Halo 2 soundtrack, but Halo 1's OST is also very good.