(I don't even know if I'm allowed to call it that)

Fake "Hidden" Ending:http://www.youtube.com/watch?v=P9HA0...&feature=feedu

Update:
= Proven
= Disproven
= Still being tested

Ok since my unfortunate ban from the Bungie Forums back in 2009 for posting leaked pictures of Halo: Reach (Bungie if you are reading this I took the pics off before I was banned, my gt is trand0 Unban me) I have no place to post this but here on the 405th.

There is a Legendary Ending to Halo Reach, as many of you already know, the smallest sliver that is known involves an eagle landing on you helmet in the game's final cutscene, and that is all we know of it (it was in the Legendary Commentary if you missed it.) My speculation is that you have to beat the game, by your self, on mythic difficulty, possibly without dying? Any others? I want the 405th to claim the right to say that we found the Legendary Ending to Halo Reach, and a cookie , and not the multiple teams on the B.net forums who are doing the same thing. Any takers? Please post you speculation on this, any ideas you have, and any screenshots or any tips to possibly finding the ending. (PS this is not an Assassin Skull-like myth and really exists, for Bungie had hinted there is an ending.)

Edit: I already have a team of me and three others who are trying to uncover the secret, if anyone wants to organize anything please post

Edit: http://www.youtube.com/watch?v=lLdd9bHPCTo
Skip to 12:47 for the confirmation of an alternate ending.

Theories:
1. B.O.B. Theory - Killing all the BOBs contribute to the Legendary Ending.
-The description on Bungie.net displays, "Wipe them out..." a possible hint for the Legendary Ending.
- B.O.B.s have never been found on the level New Alexandria, until the January 19th challenge titled "Golden Tree City" stating that the B.O.B. was in a banshee toward the bottom of the level, could Bungie possibly be hinting at this speculation?

2. Mythic Theory - Completing the game on Mythic Difficulty contributes to the Legendary Ending

3. Armor Theory - Having Noble 6's own armor layout contributes to the Legendary Ending
-In the cutscene opening the level "Exodus", Noble 6 looks down at his/her wrist, possibly looking for the bearings on a GPS, possibly the GPS wrist attachment in the armory?
- From the cutscene opening the level "Long Night of Solace" it is known that Noble 6 is a pilot of the classified Saber project, maybe hinting at the Pilot Helmet in the armory?
-From these two armor "hints" could there be more references hidden within cutscenes or story?

4. Survival Theory - Surviving long enough on Lone Wolf ends in the Legendary Ending
-Surviving long enough will cause tougher and tougher enemies to replace the dead ones, is this Bungie's way of saying, "Send me out with a bang"?

5. Data Pad Theory - Unlocking all the data pads contributes to the Legendary Ending.

6. LASO Theory - Completing all the levels on Legendary with all skulls turned on.
- Recently Bungie has been putting weekly challenges with the title LASO (Legendary All Skulls On) and the levels have been in order, so far only 2 have been released (Winter Contingency and ONI Sword Base) maybe to give us a hint to try it?
-Bungie may be putting these Challenges up and leading them up to Lone Wolf with an extra objective to survive for a certain amount of time. The ending may just appear when Bungie says so.

7. Title Update Disk - Microsoft and/or Bungie release a Disk containing new addon content impossible to add through DLC.
- Recently Microsoft sent out System Update "Halo Reach" disks to beta testers
- Beta Testers are not allowed to disclose what is on the disks, only that they confirm they are in fact Halo Reach disks, a little strange.
- Bungie has confirmed that any new armor, campaign additions, weapons and vehicles cannot be added through DLC, a title update this large would take up 9GB on a hardrive, they also said that the only way would be to release an update disk for Reach that would modify existing data stored on the hardive in order to make it operational. What a coincidence!

Any other theories are welcome!