This early example of a flight simulator tasked players will flying solo (hence the name) over the United States, delivering bags of mail. The game covered many of the states, and even included altitude data for mountains and taller hills. However, due to the technology limitations at the time, the in-game landscape always appeared flat. Flight models were reasonably realistic for the time, with fairly authentic recreations of cockpit instruments to watch and maintain as players flew. The game was created by notable developer Sid Meier and was one of the earliest titles published by MicroProse, a studio co-founded by Meier.