I'm trying to remember this game and what it is called but I don't remember.?

Its a game on game played online. Its about a little robot boy who has lost all his body parts in a maze and he is with his mother also a robot. He tries to please her by fighting off his brothers and finding his body parts and gaining new powers. Then when he finds this amulet thing. The maze shartes to shake, and the mother betrays the little robot boy. I just can't remember the name of this game and it's frustrating me. Can anyone help?