Kingdom is an enhanced version of Hamurabi. The gameplay is largely the same, but there's an actual goal now in the form of reaching one million combined units of bushels and acres of land instead of simply playing for up to ten turns. In addition, there are a lot more events, including positive ones like rains, grain shipments and land expansions, as well as negative ones like attacks by Huns, droughts, earthquakes, thefts, and plagues of course.