The original arcade version allowed up to 28 players to mann the guns of the Dragoon together. Other, smaller versions were also available (GM-16 and GH-16) that had only room for 16 players.
A weapon called "Cannon Seed" is aimed at Earth and will destroy it if it isn't stopped in time. To do just that, the United Galaxy Space Force sends the Starship Dragoon out into enemy space. While the space ship flys a pre-recoreded path, the players mann the guns of the ship and try to shoot down every incoming fighter as well as the Cannon Seed itself at the end.
This page contains co-op info for Galaxian3: Project Dragoon on the Arcade [Classics]. All information about Galaxian3: Project Dragoon was correct at the time of posting. Information is subject to change. If you see any errors please email us.