Galcon is a real time strategy video game developed by Phil Hassey. It is set in space and involves maneuvering fleets of ships to capture enemy planets.
Galcon Classic was released for the desktop in late 2006 for Ludum Dare, a timed game development contest. It was then developed into a more advanced video game. Galcon Classic features dozens of single-player game modes and full multiplayer.
Source: Wikipedia, "[en.wikipedia.org/wiki/Galcon Galcon]", available under the CC-BY-SA License.
This installment in the Galcon series was released for Windows, Mac and Linux, and features online multiplayer capability for up to 12 players. It is retrospectively referred to as Galcon Classic to distinguish it from other Galcon games.