The Settlers Online

The Settlers Online (German: Die Siedler Online, known as The Settlers Online: Castle Empire in the United States) is a freemium, online browser-based version inspired by The Settlers.^[1] A beta version of the game was released in Germany, Russia, and North America on October 22, 2010,^[2] with the final build released worldwide on September 19, 2011.^[1] On April 02, 2025, it was announced that the German game developer CipSoft would be taking over running and developing the game from its original publisher, Ubisoft Blue Byte.^[3]

The Settlers Online
Developer(s)	CipSoft
Publisher(s)	CipSoft
Platform(s)	browser game macOS Microsoft Windows
Release	September 19, 2011[1]
Genre(s)	City-building RTS
Mode(s)	Multiplayer single-player

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In the game, the player has to build a city, defeat bandit camps and complete quests to earn XP and level up, unlocking different new buildings, mines and soldiers.