you cant be sereus dude really im not even gonna anwers
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.
press the X button on the campaign selection menu.
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!
When in the campaign lobby, press X to bring up the settings menu.
When you go on to the campaign page press (X) and then select the skulls that you have collected.
Go to the campaign menu and press X and your skulls collection will pop up.
on the campaign menu press X
Yes Halo ODST's campaign is definatly going to be longer than the one in halo 3, the long campaign was one of bungies main objectives in the making of ODSTAnother answerer:No Halo 3 ODST does not have a longer campaign than Halo 3, it is only an expansion to Halo 3
You get the Halo 3 ODST campaign and Halo 3 multiplayer. Nothing else.
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.
u dont unlock it it already comes unlocked
get a new halo 3 disc