Caesar.iii.zip ...: File: : To run the game on modern systems or with popular mods, the base game must be updated to Version 1.1 (or 1.0.1.0). You can check your version in-game under Help -> About . Modern Engines (Julius & Augustus) Most modern "write-ups" recommend using an open-source engine to play the game on current hardware: File: Caesar.III.zip ... : Place these in the main directory. They will appear under the City Construction Kit menu. : To run the game on modern systems To install these, you must first have the original game files. File: Caesar.III.zip ...