You can carry it around all the time if you want, but you don't need to. once you got the hold of one, you can activate it by pressing x on the campaign page and the ones that you've found will be glowing. press on them and they will low brighter to show that they are in effect.
After you pick up a skull in Halo 3 you unlock a cheat and an achievement for the game. You do not need to carry them to the end of the level to unlock the achievement or the cheat you can drop them once you pick them up.
It really depends on what skull it is. Some skulls make playing more amusing but most of the skulls are meant to make the game more challenging. Each Halo 3 skull will get you gamescore points and an achievement. If you want the skull on press X when the game is loading and click it to turn on and vice-versa to turn off. Once you have 13 skulls you can get the full Hayabusa Armor. Also if you complete all 49 achievements in Halo 3 and find all the skulls you can get a non-usable Katana Sword.
go to the website of Halo 3 Skulls to find out where they all ARE! = )
Search for Halo 2 skulls on www.youtube.com and there will be a selection of videos showing the wereabouts of the skulls or how to get them : )
ok, go to youtube and type in "how to find all halo 3 skulls" then watch the video and get the skulls. yes, its that simple.
Sorry there arn't any, The only skulls are in "Halo 3" Which are used in "Halo 3 O.D.S.T."
find the skulls
Find them your self
There are no skulls in Halo Reach.
what do you think retard they looked!
The skulls are hidden all over the map. To get them all you have to do is find them and pick them up.
There aren't really Skulls, they're more like glitches in the game.
you look for the slave to the left
Yes, you have to find them just like before.
No you must find and claim them