1 Shogun
2 Medieval
3 Rome
4 Medieval 2

The next one is Total War FIVE people.

In regards to the actual topic at hand...

I personally never got into multiplayer. People are dicks most of the time and, for me at least, I either end up facing some over-blown idiot who spends all his time working out exploits or some total n00b who I spend most of the game explaining the concept of moving ones units to.
*shrug*
Current TW multiplayer is fine by me. A multiplayer campaign is fine as well, I suppose, even though it'd take forever. If it doesnt take away from the development of the ACTUAL game, its fine with me.