Talk:Starkiller/@comment-31051251-20161217203204/@comment-5035900-20171029170308

The dark ending is separate and non-canon. In the game, Starkiller has the choice between fighting the emperor to save Organa and the rebel leaders or to kill Vader. By taking the latter route, the Emperor ends up crashing the ship Juno (his love interest) pilots into Starkiller, leading to said Dark Ending where the Emperor turns Starkiller into Vader 2.0. The DLC in which Starkiller kills Boba Fett and Obi-Wan, and fights Luke was part of that non-canon scenario.

As for the light ending, he sacrificed his life to allow Juno and the Rebel leaders to escape, who then created the Rebel Alliance to honor him using his family emblem to represent them. It was canon until the Extended Universe was rebranded into Legends and dubbed non-canon in comparison to the recent movies and TV shows.