the total war games were never known for good diplomacy your allies are notorius for turning on you etc. but yea its worth it
I have
Shogun Total War = alot of fun some intresting modes still a great game to play IF you run ATI gpus nvidia gpus after the 7900 series do NOT render the game properly
Rome Total War + both expansions. great game modding community is massive and diverse RTR mod is 1 of the best mods ive ever had the privledge to play
Medieval Total War I have it havent played it much as it also had the same issue with Nvidia gpus aka any DX10 nvidia gpu will not render the game properly
Medieval 2 Total War + Kingdoms Expansion = awesome game best overall of the entire franchise mods are great bugs are minimal and the mods like Third Age Total war offer a great side campaign to play
Empire Total War own it after 15hrs with the game i put it away it was buggy and broken not worth the hassel i had with steam to get it to even run patches fixed this but they were to little to late to change my opinion.
Napolean Total war originally an expansion its now a seperate game because of how bad Empires was so now you have to pay full price for an stand alone expansion
if you would like a list of interesting mods send me a PM