The Alien Enemy Intelligence is sketchy, however probes that survived the initial onslaught reported back that there are thousands of alien attack vessels of varied design and characteristics. Each is powered by a spinning blue energy core. This will be a vital part of your strategy in trying to defeat them. It is believed that when destroying an enemy ship there is a chance that the energy core will be released and can be collected by the Galactic Avenger. About 2MB of free disk space.
Installation Select the download link above.
Run install.bat from the floppy disk and follow the instructions.