Check out the full guide on Bungie.net to learn about the various customization options -- including the Grunt Birthday Party armor effect. The guide also goes over the challenge system, which allows players to complete rotating challenges that earn extra credits that can be spent on even more armor customizations. Finally, the guide details how to save films for uploading to the Reach community. Thankfully, saving films no longer requires backing out of the lobby, and can be done right from the start menu, which should come in handy when you start working on that plasma pistol / DMR pro montage.
