Total War is basically one game with lots of sets of clothes, but to be fair the developers admit they are more inspired by the cinematic than the realistic (and it is a game not remotely a simulation). They can be fun to play (especially Shogun 2 IMHO which feels like a Kurosawa movie), but after a while I get bored. Napoleon is probably the worst one (again my personal opinion) but I had some fun adding the Orient mod to it and I also quite like the 1648 mod for Medieval 2 (the modders seem to take their history seriously).