The Empire Earth Series is a series of semi historical games following and further expanding the Age tech tiering, starting from the prehistoric age up to futuristic ages.
It has the following games on the series
- Empire Earth: Goes from the Prehistoric Age to the Nano Age
- The Art of Conquest: Adds the Space Age into the game
- Empire Earth 2:Goes from the Stone Age to the Synthetic Age
- The Art of Supremacy:Adds neutral factions
- Empire Earth 3:Attempts to streamline the systems by cutting down the civilizations and redesigning them as broader regions (Western, Middle Eastern, etc) and broadening each age as well.