Halo 3 skull help! ANSWER ME!?

[Eric]

So i play Halo 3 and i want some skulls just to look cool when my friends come over. To get skulls do i have to have 2 people playing (co-op)? Or can i get them with just one person? Also, to get the skull do you just have to pick it up? Or do you have to finish the level holding it?

 

[MR C00]

Nope you can get them all by urself and u just need to pick it up and drop it and u have the skull .. Also just so you know the difficulty has to be on normal or higher to get skulls : )