For those who like a real challenge and are looking for a very good strategy campaign game have a look at: Commander: Europe at War.

For an exclusive and thorough review go here:

http://www.wargamer.com/reviews/comm...aw/Default.asp

I really recommend it, once you are playing and really get into it, you will be addicted in no time.

Like the reviewing author describes it:
This is a “ELHTOM” game—one that is “Easy to Learn, Hard To Master”. What I think is this: Commander: Europe at War is a stone gas of a game, a real sweetheart title that should woo new multitudes to the wargaming genre just as Panzer General did in days of yore. Remember when wargames were fun? The very talented gentlemen who designed this game certainly do.
Cheers,

LZ