broken bloodlines

you are the heir to a kingdom of pure technological might. or at least should have, you see your illegitimate brother who is also the favourite claimed you are not legitimate and your parents and sister believes him your grandad did some digging and found the truth but you brother pushed him into a pit monsters you saved him but he is in a coma. your brother blamed you for it and you got sent outside the saftey of the walls and into the wasteland for three years. you lost an arm to a beast attack but you made a robot arm that looks like flesh. you have been dragged back to keep your nan happy. your parents still hate you and your sister hates you your girlfriend is now married to your brother and you are still standing