It loosely follows the RotTK books, which I guess are loosely based on historical china, but not quite. Otherwise some of the characters would have 1 stage scenarios, Pang Tong for instance.
I'd take Historical > Gundam any day, mostly 'cause I'm used to it all.
sure you can get used to it but wouldnt you be bored after? the first games I ever played from koei were nobunaga's ambition and rotk for the nes backk in the day. nobunaga was loosely based off japanese history but rotk was pure chinese. then you get dynasty warriors. based off the books (well except for the 1st I believe). I've played 2,3,4,5 even one of the gba ones. imo its boring playing the same thing over and over (ok, yes there are magical attacks in the latter ones), hell add samurais and i'd love that game. oh right samurai warriors
. robots? dw gundam
currently starting a new game in metroid prime, I never got to beat it all I remember is a lot of scanning