Bungie is aiming for a "T" rating, and after seeing videos of game play and looking at ESRB, I would assume that it will be rated T. For a game to be rated M, the following must be prevalent: intense violence, blood and gore, sexual content and/or strong language. This is from ESRB's website. The game showed fantasy violence, no blood, (and what I saw of it) no sexual content or language. For a T game: violence, suggestive themes, crude humor, minimal blood, simulated gambling and/or infrequent use of strong language. So of the clues we have now, and if ESRB is true to their grading system, it should (in my humble opinion) be rated T.