Advent Shadow was an action-adventure game developed for the PlayStation Portable handheld and a side story of Advent Rising, however, the game was cancelled in January 2006. It follows the story of Marin Steel, a mercenary pilot thrust into a saga of intergalactic proportions. In the midst of extracting herself from a hostile negotiation, Marin is interrupted by a planetary invasion led by monstrous aliens bent on human genocide. In her efforts to escape the dying world, she encounters young Gideon Wyeth, the protagonist of Advent Rising, and together they find themselves swept up in a massive struggle against dire forces bent on the destruction of humanity.