I play alot of Total War(currently own, Attila,Rome 2, Shogun, Warhammer 1&2) , but i never played online. TBH I'm not really sure how to, every time i try it says that i have a different version than the host and i never really looked into it further.
Just bought Europa Universalis IV ( Started a Mali campaign) but i haven't really gotten into it yet, it just seems a bit overwhelming at the moment .