The history of MicroCiv Eternal City is classified into several eras, mainly the City Era and the Eternal City Era.
| Era (sub-era) |
Existence |
Notes |
| Pregame |
1988 & 1989 |
Currency and properties began being used with some concepts developed. |
| City Era |
1989-1996 |
Rules verbally codified and the game is named City. |
| Intergame |
1996-2023 |
Plans to bring the game back didn't materialize during this time. |
| Eternal City (Regenesis) |
MAY23-OCT24 |
Game brought back with version 1 rules of MicroCiv and some custom rules, including temporary experimentation with NPCs and virtual regions. |
| Eternal City (Transitional) |
NOV24-OCT25 |
Version 2 rules of MicroCiv adopted as well as some new custom rules. Experimentation with EverBlock begins. |
| Eternal City (EverBlock) |
NOV25-present |
EverBlock buildings create double the materials and products. |