Forum:Making a Halo "pen and paper" rpg idea

So, I was thinking about trying to put together a Halo game similar to the original "Vampire" and "Dungeons and Dragons" games. Not to sale, but to play with me and some friends that enjoy both Halo and games like these. What I was wondering is if this is actually a good idea or not. I'm not sure if many people would like it but I believe that some would really enjoy the chance to be a Spartan or a Soldier or even an Elite or Grunt. Does anyone think that this would be marked as copyright infringment, or do you think Bungie would allow such a thing to be made just for fun? Currently, I am trying to get into contact with someone at Bungie that would tell me if it would be alright if I were to do this, but so far I have found no way to contact them. This is just me, asking a few questions. Thank you for your time.