It seems to me that Bitfighter is one of the least known, high-quality, free games in this universe. Three ideas to change this:
* Add the game to the major software/game sites/directories. There are sites for the three platforms.
* Link the game in the comments of blog posts like "10 awesome freeware games"
* Create a short and action-loaded gameplay video and post it to the major video sites
May the servers be filled.