IGN caught up with Civ IV: Beyond the sword lead designer Alex Mantzaris in which they talked about the usual increase in units, civs and wonders, plus all the new features such as "new gameplay elements that emphasize non-military strategies" and the bigger role of espionage.

IGNPC: What inspired you guys to create such a huge expansion to Civilization IV and why is it "Beyond the Sword"?

Alex Mantzaris: We chose "Beyond the Sword" because it encompasses two aspects of the game that are receiving special attention in this expansion pack. The title suggests that we are giving more depth to the second half of the game, when swords are obsolete as a weapon for combat. It also implies that players will have more options than ever when it comes to building up their empire through more peaceful means.