Bethesda Software is currently making a new space combat simulation called Echelon. It's got all the classic marks of a space sim: alien invaders launching a surprise attack in an advanced peaceful future, a dozen different types of space craft, and many Wing Commander parallels. But what makes this one different is that it takes place entirely on the ground. Or in the atmosphere at least. Echelon is basically a flight sim that employs extensive space ship themes and environment. Avault has a new preview of the game and they point out it'll be a lot like intricate ground missions from Wing Commander 3 or 4. You can find the preview here and a photo gallery here.