A Halo modding community has accidentally made various hidden game files public, found by retrieving hidden data in the Halo 3 Beta code. They reveal new weapons, vehicles and equipment and also suggest new modes and rankings for the full single and multiplayer game.
Before we go any further, a warning: the following are in no way official or confirmed features of Halo 3, but they do appear in the Halo 3 Beta code in some form too complicated for us to comprehend or explain. We're just the messenger.
The original thread regarding the secret content at Halomods.com has been “edited” to remove the details in an attempt to keep their forums related to modding and not game content.
Finally, XBOX360Fanboy.com has re-blogged the Games Radar story and included links that support some of the speculation.
Read on for the list of leaked details, that you may view as SPOILERS ….