Here's are the lists of previously related version to either Imperator or Metro-Naval mod which mainly are base on RTR 6 Gold.

Imperator+Metropolis Mod v1.0 by scipio_aemilianus

Metropolis & NavalMod by SnakeIV

IMPERATOR - Rome Mod v1.0 Final Edition by LestaT


These are mods base on RTR 6 Gold which runs on RTW 1.2 version.