Dans le niveau le grand voyage :|
Genre ca 
Heretic Banshee
Level: The Great Journey
Difficulty: Any
Description: A Heretic Banshee on The Great Journey
How to Find: Start "The Great Journey" on any difficulty setting. When you fly to the beach where the Wraiths are, don´t go towards them. Right after the drop off (the one by where you first started out on the level) go to the right side. Fly along and look towards the ground. There should be a Heretic Banshee. (This is not way up on the beach, it is far away from the water.)
J´en ai posté une version plus difficile sur le topic de l´armement caché halo 2 machin là. En tout cas celle plus haut semble pas marcher, ou bien je sais pas où chercher.