To select the skull menu in Halo 3, go to the main menu and choose "Campaign." After selecting your desired mission, press the "Start" button to access the pause menu. From there, navigate to "Skulls" to view and toggle any available skulls for that mission. This allows you to customize gameplay with various modifiers.
When you go on to the campaign page press (X) and then select the skulls that you have collected.
you have to restart the game and activate skulls from the main menu
go to the main menu and select forge
on the halo 3 main menu go on matchmaking pick a gametype and select start match making
No
What do you mean "How do you play solo campaign on Halo 3?" Just go to the Main Menu and select campaign and start Solo Campaign.
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.
start up halo 3 once on the main menu go to the to the top of all the options and click on solo campaign any select a difficulty and start playing!
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