According to a letter left on the website, EU's EYASoft developed a superior version of the game that went into open beta in Europe. Apparently this version was both so good and so incompatible with the North American version that GamesCampus decided to halt progress on the current edition of Legend of Edda in favor for the new and improved one. "Unfortunately," the letter says, "because of the extreme differences between the US version and the new version, it is impossible to update the US servers to the new game."
To compensate Legend of Edda fans, GamesCampus is creating compensation packages to refund in-game currency and encourage players to try out on of the studio's other titles. We covered Legend of Edda earlier this year in our Rise and Shiny column.