yes everything except multiplayer
yes
Yes, if you have the Halo 3 PC version of the game
They stoped online play for Halo 2 back in June 2010. And you need Xbox LIVE to play halo 3, however on the new Xbox 360 u can play halo3 online for free
you play online
some might get bored of halo and play w.o.w, but only if they don't have online halo 3. they also get bored of w.o.w and start playing halo 3 online.
No, halo 3 forge is not offline, you may play it online with friends or others.
no
yes alot of poeple still play halo most are mlg or pros througe
Yes, Halo 3 can be played in local co-op campaign and in local and online PvP multiplayer.
yes i think there is
Xbox live yes
i play a lot of games far cry 2 is a big game like u can explore anywhere u want like oblivion and fallout 3. halo 3 has a good campagin but its all about the online there's aload of online achievements added last year for me its halo 3 its legendary, but its what you like, vast maps do what ever you want kinda game or loads of online play? remember though your always gonna get those people on halo 3 that play nothing but halo 3 and are impossible to play against