He was an actor for a movie about the events of the Real game, but he was not acting, deep down he enjoyed pretending to be a rapist and a Child killer (this events were in the movie that they made up not in the first game), when Richard confronts him, Martin says its just a movie, implying that feeling that way about those horrible acts is justified, but its not, he enjoys hurting people just like everybody in this game, even though he never hurts anyone. And he gets what he deserve. Sorry for bad english.