If you like first-person spaceship games that have you going underground and flying with six degrees of freedom, then Descent: Underground might be something worth checking out. The devs describe their work as a true FPS that gives you all six degrees of freedom as you want it.
Based on the old 1995 series of the game that ended in 1999, the first-person underground shooter finally stepped into the 21st century with a new version called Descent: Underground. As expected, you will be underground ...