1. The most historically accurate representation of the time period as is currently possible.
2. The vastly improved variety of units.
3. The intirguing (almost RPG style) trait system.
4. The complex advances in gameplay.
5. The new victory conditions.
6. The sheer artistic beauty of it all.
7. The history "extras" in text and supporting information.
8. The balance of units, I.E. no more "uber-unit super-stacks".
9. Other: You name it:
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