Civilization 

The main game of Civilization Revolution begins in 4000 BC, with a lone settler unit in the middle of a little-explored region. That settler has the capability to found a city, which, depending on its specific mix of geographical surroundings, begins harvesting food (for the continued growth of the city), production (for the creation of units and buildings), and trade (that can be then turned into either research points or wealth). In the early stages of the game, you will encounter uncivilized villages consisting of primitives such as barbarians and friendly villages. Over time, further settlers can be created, forming new cities; buildings can be built to improve each city's overall productivity; military units can be formed, focusing either on defense, offense, or exploration; technologies can be researched, allowing for newer buildings and units; etc. Buildings in a final category, "Wonders", provide major advantages to the civilization that builds it, either across their entire empire or just in the building city, depending on the Wonder. Meanwhile, rival civilizations are encountered, which can be both valuable trade partners, strategic allies, or dangerous enemies. Ultimately, each civilization competes for land and resources with the purpose of eventual military, technological, cultural, or economic domination.