The Star Fleet series of games created by Trevor Sorensen. Released for the PC in 1986, Star Fleet I: The War Begins! remains one of my favorite games of all time. Set in a universe similar to Star Trek, the player is assigned the command of a United Galactic Alliance (UGA) star ship with which he must defend an area of space and its star bases against incoming invaders. The player controls torpedos, phasers, transporters, shield control, security, etc. during the game.
Feel free to contact KrazyAwesome if you would like to play Star Fleet I: The War Begins! but do not have access to a working copy of the latest release.
Click here to view the list of access codes required to play the game.
The game can be downloaded from Home of the Underdogs: http://www.hotud.org