WildWeazel
Carthago Creanda Est
I don't know much about this, but the backstory is there on the page. It was supposedly one of the earliest "strategy games" written in the 1960s by a teacher, and the source code was lost, but now a modernized version is available on Steam.
The Sumerian Game on Steam
A game of strategy and management. The Sumerian Game is one of the earliest computer games. Developed and programmed between 1963 and 1965, it was designed to teach children math, economy and ancient history. The source code was lost but now you can play it again.
store.steampowered.com