At last I got my copy of Civilization4.
It shows tributes to original Civ1, including the BGM during world creation, and (in)famous Dan Quayle in the ranking. Much funs for old timers like me.
It also includes Python interpreter embedded in itself to enable modders create event scripts in Python, something like EU2. In fact Game Tutorial is scripted in Python. Great! Though I wish it had Perl interpreter instead of Python, Civ5 will have Parrot VM anyway.
