the skulls are there as secrets to find in Halo 3, you get achievement points for finding them and picking em up with RB button there are about 16 in total, if you go to the campaign lobby after collecting some(skulls), press X button to edit campaign options, you can view and turn on the skulls you have already got, turning them on gives points for a meta game (when you play campaign after turning on at least one skull), after you reach a certain limit of points, you can win achievements in each level.however, turning on the skulls, makes the game harder (enemies more powerful, less ammo, un-recharge-able health meter etc..)- the more skulls turned on, the more points!!! you can find some online skull location walkthroughs and what they do here is one:
http://uk.faqs.ign.com/articles/823/823401p1.html
goodluck!!!!!
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
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!
you walk on top of it
halo on your faceinit blad diary of a badman rules
you need to be playing on normal,heroic,legendary to find any skull on halo 3