Halo 3 catch skull on storm level won't appear! Need help. Will give best answer

[Qwer]

award.? I have every Main skull from the halo 3 campaign except for the catch skull found on the level storm. I know where the skull is. I play it on normal from the very beggining. I also haven't killed any of the wraiths, and tried killing the AA wraith but not the blue one. Even with another person. I tried mutliple times to no avail. Should I contact bungie, or am I doing something wrong. NO you do not need to complete the game on normal or any of your voodoo garbage you suggest. THere has to be something I am doing wrong or else the game is messed up.
well, not killing anything won't make a difference. Things will die by marines so its pointless to not kill anything.

 

[Kira]

This might not help but try to get the skull without killing any enemy that is important or go directly for the skull as soon as you enter the area also try doing the level on legendary.