Sid Meier's Colonization

Colonization is much like a more developed version of Sid Meier's previous game Civilization in visual design and handling, but the two have marked differences in gameplay. Instead of forging a nation from nothing, the player manages the cross-Atlantic expansion of an established one in the service of the Crown. As the colonies become more self-sufficient their subservience shifts from boon towards bane, and to win the player must ultimately declare independence... (wikipedia.org)