Battlestar Galactica Online is a browser-based massively multiplayer online game (MMO) loosely based on the 2004 television series Battlestar Galactica. Released in open beta on February 8, 2011, it was developed by Bigpoint Games and Artplant using the Unity game engine for the game client in the browser. The game server was written in Erlang. In less than three months of release, the game surpassed two million registered users.

Bigpoint announced in early January 2019 that the game servers would be closed at the end of the month, and the game permanently shut down in the early morning hours of February 1, 2019.

Battlestar Galactica Online was a space-based flight-combat game set in the Battlestar Galactica universe, in which the player took the role of a pilot. A player could select to be either a Colonial (human) or Cylon (cyborg) pilot upon registration, after which the player was locked into that side. Multiple log-ins were possible, allowing players to create multiple pilots of both factions. Battles could take place between hundreds of pilots at once.

This is a private non-profit server.