On the off chance you, the OP, aren't trolling:
You are aware that other races exist besides white and black, right? I get that racism as a whole seems to have been more or less defined in the western experience by the interactions between whites and blacks and when it's applied to relations regarding races besides the two we still think in those terms but really? I mean, do we know if it was a conscious choice to exclude blacks? Is it possible they just didn't think to have any black characters because it never came up? Are you proposing that game developers should have to make sure they represent the entire rainbow before the game ships lest some excluded group feel offended? Isn't the suggestion that they'd all feel offended because one of their own was not in a video game even more racist because it suggests non-whites get their feelings hurt much, much easier than whites and that whites need to be extra special nice to them so they won't kill themselves in their depression?