It's a browser based RTS set in space. Also free. I've been playing it since early January. It seems more than a few regular players have rage quit, so I'm trying to get some new blood in the games. A lot of strategy goes into this game. You can't just rush in and expect to win on your first try. Also, if you do join a game, be wary of your allies. Six times out of ten, they will backstab you.