Hello Fellow Halo Fanatics!
Here is a Video Of short explanation of Multiplayer Helmets and some awesome game play
Enjoy,Comment your thoughts and idea's about the video!
http://www.youtube.com/watch?v=jGu5U9qyi1Q&feature=player_embedded
The Promethean could be "Blacked mail" by the covenant to work with them to destroy Human Kind,but later find the Truth and want to destroy the covenant as well