Not to mention, Shadow becoming a hero in his titular game doesn't make much sense. Last Story implies that Shadow was working with Black Doom (or at least, was neutral about the whole thing). Then Doom reveals he's going to eat some humans and that's where Shadow draws the line, I guess? Even though the game opens with Shadow watching humans get killed by aliens and hes like "HEH...pathetic creatures!" The sudden alignment change makes sense in SA2 because Maria was his anchor, but in the Shadow game it doesn't have any logic to it.