Found a little gem of a game (spacesim)

[kiwi_2005]

Starshatter The Gathering Storm
Starshatter The gathering Storm is only 800mb in size and probably class as some b grade game but dont be fooled by the crappy name or 2004 type graphics this spacesim rocks. A dynamic universe, mod friendly, modders would have a field day with this, mission generator, campaign & multiplay co-op. Take command of whole fleets, fighters, cruisers, dreadnaughts, cargos, command them all.
If your ever played Derek Smarts Battlecruiser series then its very simular but this one actually works, yep you can enter planets and fight it out too. Just dont expect fantastic graphics although they are good enough check out the site, and update to the latest patch, fixed joystick problems. Runs on vista as well.

A nice spacesim.

Starshatter is a space-sim modder's dream platform. Because Starshatter was designed from the ground up to support so many different play styles - from space fighter combat to airborne strikes to starship battles to fleet tactical encounters - you can use it to create mods for just about any popular science fiction universe you can think of. Creating a new mod can be as simple as importing some new ship models, editing a few text files that define ship and mission parameters, and running the game. Starshatter includes a "Custom Mission" selection screen that allows the end user to play any mod that is installed in the game directory.

http://www.starshatter.com/screenshots.htm