Episodes: 0Status: Completed
Alternate Titles: Ginga Eiyuu Densetsu Gaiden: Rasen Meikyuu, LoGH Gaiden: Spiral Labyrinth
A prequel to The Legend of the Galactic Heroes, focusing on the FPA's Yang Wen-li. A chronicle on how he earned the title "The Hero of El Facile" and his handling of assignments he received after the historic event. Spiral Labyrinth also continues with the background of Reinhard and Kircheis where the first Gaiden left off.