In the twitch reveal stream Bungie showed some of the milestones required to complete the record book. On the Crucible page, the "Historian" milestone requires the collection of all 30 dead ghosts on the crucible maps. Xbox players have access to only 28 of these maps, Sector 618 and Icarus being Playstation exclusives. Does this mean that Xbox players will now have access to these maps - and hopefully that the other exclusives will also be available to Xbox? If not, then the record book should be different depending on whether you are on Playstation or Xbox as it is not reasonable to have milestones that are impossible to complete for some guardians.