When all ten ending are gotten, the final story is unlocked. Seeing as Black Doom knows him, this compels Shadow to find the Chaos Emeralds in order to uncover his past.ĭepending on which path Shadow takes, he will end up at one of ten endings. Black Dooms says that they had an old agreement in which Shadow would bring him the Chaos Emeralds. At the start of the game, aliens begin to invade the world and Shadow is approached by their leader, Black Doom. The story takes place after Sonic Heroes, with Shadow suffering from amnesia.