this isn't just a mod for Greeks in vanilla?

[Prince of Judah]

I've been looking for a mod that just adds more units, features, and improved skins for the greek city states. Is this mod like that or a total conversion? After reading some of the guide it seems like this is a mod for all factions and the difficulty is extreme.

[aznflea]

the difficulty is only extreme in VH/VH because of the AI bonuses. they spam stacks of high qulaiy units. xgm adds more depth to every faction and it is still very close to vanilla rtw in looks and feel. just way more historically accurate.

[Zarax]

If you're looking for a light mod you might want to try some older version: http://www.wmwiki.com/hosted/xgm/

[htismaqe]

The difficulty is also extreme for some of the factions, primarily because of their starting situations. Some of the Provinicial campaigns are almost impossible to us noobs...

[Scutarii]

Its a ton harder than vanilla, but just start out on a lower dificulty to compensate (maybe M/M) and make sure to click Reduced AI bonuses when installing.

XGM is a total conversion. Most factions have complete roster overhauls, barring Pontus, Rome and Armenia, and while Rome hasn't had an overhaul, it has been changed significantly.