Great stuff, my favorite addictive strategy game of all time came out and it's called Civilization IV.
When the original version came out way back in 1991, I fell in love with it right away, spending many nights moving through one century to the next, trying to be the first one to get to Alpha Centauri.
Now this game has improved immensely and offers an amazing new world in which to immerse yourself completely. Technology, religion, diplomacy, cultural breakthroughs, wonders, prophets, mechanized armor, trade, catapults, and much much more.
Hope I survive.