In a landmark for Cemetech, Civilization Simulator I has been featured at ticalc.org. As they put it:

Civilization Simulator I is a BASIC game for the 83/83+ by Kerm Martian. An ancient civilization is created and lives in 3-D, fully zoomable and scrollable. Your goal is to guide your fledging society through three ages, gathering food and building structures. Due to the nature of BASIC programs, gameplay is slow but the game does an excellent job with the graphics.

You can download it for the TI-83 and TI-83+ right here.