Halo 3 Skulls?

[Dipsy!]

Hey! im Currently Goin after the Halo 3 Skulls, but The One Called Iron isnt in the Spot its Supposed to Be!!
Anyone Know Why Its Not there?

 

[dagingercode]

I saw a skull on halo 3.... What are they for?

 

[zzack9]

First of all you need to be on legendary or 2 dificulity levels under it. Then you need to make sure you start at the begining of the level. Then look for it from there. If your doing that then youll eventualy find it.