Hello.First off let me tell you about a game callled total annihlation.One of the most moddable gamesi n history.Not only could you mod existing units but you could also ADD units and buildings into the game!In other words if a faction in the game can have 60 different types of units then you can make 100 more and ADD them to all the units you can build in a campaign like match.

Can this be done in rome total war.Can you actually ADD new units and factions into the game instead of modding existing ones?