On the level ark, you will be asked to search for a relic that you are unable to open until you come back to that relic with the artillery before you even get to the artillery you will come to a curved path with a awning structure above you turn around hop on the cliff and get on top of the awning the skull is on a fin shaped structure it requires a grenade jump to get.
Check the related links below. Look up Famine Skull on Youtube.
any weapon you pick up will have half the ammo it normally would.
No
The first skull on halo 3 is a silver skull. Silver skulls do not award any achievements.
After finding a halo 3 skull, simply pick it up as you would any other weapon.
once you get a skull in halo 3 you can co to the campain options and turn it on different skulls do different things
13
http://www.halo3planet.com/halo-3-skull-locations/ is were I found them
There are 13 skulls hidden in each of the levels of Halo 3. They are way out of the normal way to complete the level so the only way you can really obtain them is to actually know where they are. Just look up Halo 3 skulls on Google or Youtube and they will show you exactly how to get there. Some of the skulls are relatively easy to get but some such as the Famine Skull can be very difficult. Once you come upon a skull just click RB. You do not need to finish the level in order to get the skull. You must start from the BEGINNING of the level and play on normal, heroic, or legendary to get the skulls.
You do not jump through rings to get the tilt skull in halo 3.
the fog skull takes away your radar. you find the skull on floodgate
There are not skulls in Halo 2! It's just Halo 3!