Okay so I have a copy of Halo 2 and have download a patch that will allow me to play my Halo 2 online but I can't access the single player campaign and I don't really know what to do and so I would love some help with this because I love Halo 2 but I can't get the single player to work and I have been told there's pirated versions that are automatically fixed but I have the actual Halo 2 PC disc and I want a option that doesn't require any pirating please. Right now I am working with Halo 2 project cartographer patch. So if you could help me out that would be nice.