Your starbase is under attack! Ward off an alien invasion by firing your guns and preventing the alien hordes from boarding your base. But be careful... Friendly ships will try to reach you with much needed medical supplies and arms such as Supershots and Shields so you can live to fight another day. As you get better, you'll progress further and further in this classic space shooter. See how long you can last against rush after rush of aliens! Good luck and Unplug and Play!