I mean, I can barely hear myself complaining about Battlestar Galactica.

Vega Strike is an free and Open Source 3D Action-Space-Sim (works on Windows, Linux and Mac OSX) that lets you trade, fight, and explore in a vast universe . You should definitely try this if you are a fan of movies such as Star Trek, Star Wars, or anything else involving spaceships of all sizes in space fighting, merchandising, and exploring.

Celestia is a free opensource space simulation software that lets you explore our universe in three dimensions. Celestia provides photo-realistic, real-time, three-dimensional viewing of the solar system, the galaxy and the universe and has become a valuable tool for education in Astronomy.

LinCity-NG is a city simulation game. It is a polished and improved version of the classic LinCity game. In the game, you are required to build and maintain a city. You can win the game either by building a sustainable economy or by evacuating all citizens with spaceships.

Running Ubuntu inside Windows has its place, but it’s far from an ideal solution. Download "Portable Ubuntu for Windows."

For those trying to find a new Linux game that offers good graphics while not being a first person shooter with little to no plot -- as is the case for a majority of the commercial and open-source games available for Linux -- the Amnesia: The Dark Descent game is expected to be released next month.

DarkWorld is a free space based massively multiplayer realtime strategy game. Each player starts off with their own home planet. From there they can build ships, start exploring the universe, colonize other planets, and attack other players.

AstroMenace is a 3D space shooter game. This game features include: create your own levels by using script, allow mouse, keyboard and joystick control, support Linux and Windows platform. AstroMenace is a very funny game.

This is a good car rally game. It is free to download and use. Works well on Ubuntu Linux. Give it a try.