I would suggest COD 4 (Call Of Duty 4) or Halo 3 but my favourite is Call Of Duty 4.
Well, and Xbox360/Xbox lets you connect, and play against your friends online. And you can still have fun in Campaign in some Xbox360/Xbox games to.
no, you only need xbox live if you want to play online
yes it can
Yes.
Nope, Xbox360 games bought in the US will not work on an EU system.
Yes
A Xbox360 is a console, the second after the first Xbox. You play Xbox360 games on it and I think you can download or buy a thing so you can play your Xbox games on it to.
yes you can but only if you have a hard drive
Play the campaign and beat it on veteran. It would also helped if you played hte previous CoD games before it and beat those games on veteran.
HELLLLLLLLLZZZZZZZZZZZZZZZ NO! A PS2 is much cheaper than an Xbox360, but other than that, an Xbox360 is probably better. xbox360 has better games
yes xbox games work on xbox360 if you have the hard drive but some of them dont work.
Both are very cool games but in World at War, after you beat single player campaign, you unlock zombies (insanely fun).