Golden Sun: The Lost Age, released under different names in some regions, is a 2002 role-playing video game for the Game Boy Advance, developed by Camelot Software Planning and published by Nintendo. It is the second installment in the Golden Sun series and was released on June 28, 2002 in Japan, and in 2003 in North America and Europe. Taking place after the events of the previous game, The Lost Age puts the player into the roles of the previous games' antagonists, primarily from the perspective of magic-attuned "adepts" Felix and his allies as they seek to restore the power of alchemy to the world of Weyard. Along the way, the player uses Psynergy to defeat enemies and discover new locations, help out local populations, and find elemental djinn which augment the characters' powers. Players can transfer their characters and items from Golden Sun to The Lost Age through a password system or Game Link Cable, and are rewarded for fully completing both games. Upon release, The Lost Age was positively received by critics and audiences. IGN ranked the game as the eighth-best Game Boy Advance title of 2003 and the 22nd-best GBA game of all time. It has sold over 680,000 units. It was eventually followed by a third installment, titled Dark Dawn, released in 2010 and set thirty years after the two original games. Like its predecessor, The Lost Age was re-released for the Wii U's Virtual Console service via the Nintendo eShop. It became available first in Japan on July 23, 2014, and later in North America and PAL regions. Along with Golden Sun, it was released on the Nintendo Switch Online + Expansion Pack on January 17, 2024.