Announced in the latest weekly update, The Dark Beyond is the sixth mission available in the Beta (a bonus mission) and tasks the player to follow the trail of a Guardian who went dark searching for a way into the Hive Fortress. This event is the only way to experience Moon PvE in the Beta!
Starting Saturday, July 26th at 2:00 PM (PST) and lasting for just two hours, Bungie is holding a special public stress test event to set the record for concurrent players before launch. Anyone playing during this time will earn a special nameplate that will transfer over to the full game when it launches in September.