Sid Meier's Civilization V is the best strategy game I've played.

The new hex grid tile system works extremely well for combat, allowing for a much more strategic, intellectual battle.
Sadly, the game doesn't fully feel complete without both the Gods & Kings and Brave New World DLC packs. G&K's revamps the technology tree, adds more buildings, units, and civilizations, includes an espionage system, and adds a religion system to the game. BNW adds a new cultural system/victory, new civilizations, ideologies, trade routes, and a world congress. Both DLC packs are a must-have for the full, complete experience.

Be prepared to be a victim of "just one more turn".

Sid Meier's Civilization V is the best strategy game I've played. The new hex grid tile system works extremely well for combat, allowing for a much more strategic, intellectual battle. Sadly, the game doesn't fully feel complete without both the Gods & Kings and Brave New World DLC packs. G&K's revamps the technology tree, adds more buildings, units, and civilizations, includes an espionage system, and adds a religion system to the game. BNW adds a new cultural system/victory, new civilizations, ideologies, trade routes, and a world congress. Both DLC packs are a must-have for the full, complete experience. Be prepared to be a victim of "just one more turn".