Continuum (http://www.subspacehq.com/)
Look for the "download" section

This game is

1)FREE! And will always be.

2)Loads of zones, very friendly people, nice chatting with the game, you can bash ppl or talk about why you hate America, anything goes.

3)Back to the basics, like asteroids but theres 40 other ships that you can kill. There's capture the flag(s), elim, duel, powerball (like playing a game of hockey), and trench (take over a base and hold it). Some zones have you flying around as soldiers, tanks, helicopters, turrets...tho these just started so they aren't perfect yet.

4)Online

5)Hard to start off, but once you learn how to play you'll be hooked* Umm, you only use the keyboard though

*That's the only bad thing

If you give it a try, go to Extreme Games zone, its the best zone, a little hard to learn but good. To start you off (get out of spectator mode, press esc then a number from 1-8, each number a different ship).

Hope you enjoy!

EDIT: The original site that had the download disappeared, and was replaced by some annoying pop up scheme. Sorry if clicked on it after the site disappeared. The link now goes to another site that has the downloads.