I recently found this game it seams like Descent but its called defender. So i search more about this project and i found out its made by few Descent fans! This game is free and is made on open source engine (Blender game engine)! So here is their home page http://www.defender-space.x10.mx
And here is game play video http://www.youtube.com/watch?feature=player_embedded&v=i56eKiToqAk I'am quite optimistic about this project!