Imperialism II: The Age of Exploration is the sequel to the world conquest game in which you control an Old World power between 1500-1850, trying to exploit the New World to support your dominance of the superpowers.
The game breaks off from traditional conquest games by making political and economic pieces of the game much more important for overall victory. In addition, instead of merely trying to take over everything, you'll find yourself manipulating other nations, and abusing those lesser than you, including colonial lands. Imperialism tries, with moderate success, to historically represent the period, from units to strategic mentality.
The game is entirely turn-based and features a separate tactical battle screen, where careful use of your units, ranging from cavalry to artillery, is essential. It can be played on a historic Old World setting (the New World is always random), or completely random worlds, and the campaign support single or multi-player functionality.