It's in the same genre as the non-RTS part of Rome: TW, yeah.
In Civilization, you start with this (screenshot is Civ IV):
A settler and a warrior. With your settler you build your first city, with your warrior you can explore, use him to defend your city, whatever. You can also attack other people (once you scout them) but that will go about as well as a-moving your SCVs at the start of a game.
From your cities, you build buildings, units, workers to improve the surrounding train and improve the resource yield you get from it, more settlers to build more cities, even Wonders of the World that will grant their owner huge benefits. You send citizens to work the terrain surrounding your cities, from which they generate production capacity (more production = build stuff faster) and commerce, the latter of which can be divided up into tech research, gold income, and citizen happiness as you see fit (if your populace gets pissed, there be riots yo!). Tech research will take you from the above warriors with stone clubs, through the bronze age and the iron age to mother****ing artillery and fighter jets and nuclear weapons. Eventually, you get:
Dat minimap! A sprawling civilization with powerful armies and cities, and tons of neighbors to conquer (or ally with!). It's a blast.
Also, if you liked Rome: Total War, I
highly recommend Europa Universalis 3 (you can check out the VG thread about it):
If that doesn't give you nerd chills, I don't know what will. It's technically an RTS, but feels like a turn-based game at times because you can adjust the speed at will (not in the Starcraft "you can go into the menu and change it" sense; while fighting wars you'll want to be moving at like 1 day per second, whereas during peacetime and without anything major happening you'll be bored to tears by anything slower than 1 month per second).
You can start the game at any point between 1399 and 1821, and command any country that existed at that point in time. There's very complex economy management, it's hard to learn but a very rewarding experience once you do.
I have >200 hours on EU3 in Steam, and probably many times that for all the Civilization games (started playing the first one in 5th grade!) over the course of my life.
Last edited by goofyballer; 07-22-2012 at 07:25 AM.