Starting as an air traffic controller in the year 1925, your small grass airfield grows into a major international airport in 1970. Witness the WW2, the flying mail service in the 1920's, the breaking of the sound barrier, and birth of the passenger jet.
Grow your own tribe from first human-primates era to a first recognized ancient civilization. Develop your primitive encampment to a flourishing place. You need to grow population, manage workers, research technologies.