Endgame is a mode of Galaxy in where you cannot create any more factions and you can win by either eliminating all other factions or by taking over 90% of the territory. Endgame does not begin until the 95% of the map has been taken over by territory. If endgame is active, you will see flashing words right where loyalty is displayed saying endgame active. Some players think that during endgame, everyone is supposed to go to war, but that isn't always the case.
In Endgame the capital ship count is increased to four Dreadnoughts and five Battleships but the Carrier count stays the same (one Carrier). Pre-Endgame the capital ship count is two Dreadnoughts and four Battleships.