Get sculls or get achievements
You get the Halo 3 ODST campaign and Halo 3 multiplayer. Nothing else.
The only way to get armor on ODST is to unlock it on campaign . Except recon wich you need Halo 3. By Mr. Happy Guy.
multiplayer achievements and skulls
yes you can be a arbiter in only campaign multiplayer
They have no effect on multiplayer mode. They only take effect if plating campaign.
No, the Halo 3 game disk has both the campaign and multiplayer mode on it. What might seen confusing is in Halo: ODST, the game comes with two disks. One disk is for the Halo: ODST game and the second disk is for the Halo 3 multiplayer with all the latest map packs on it such as Mythic
I assume you are asking if you can customize your Elite armor in Halo 3 multiplayer to include the katana? No you cannot.
go through the story mode/campaign.
You have to find all the skulls in campaign mode.
beat campaign on legendary
Campaign made halo 3 pass as a video game, multiplayer made it EXTREMELY popular. Campaign is for you if your alone and theres nothing else to do. Multiplayer is for you if you like to play with other people via the internet, Very competitive as well as laid back, all depends on who your playing with.
The best places to get armor is to beat the campaign, collect skulls, or through online game play.