That's because both Americans and Asians see Ye Olde Europe as somethiing fancy to stay and/or meet and for us Europeans it's just fancy but old, boring trash from the old town in our cities, something to run away from... or to look from a distance with a nice scenery ;)

I mean, when you can see a 12th century church daily by just taking the subway in 20 minutes, Medieval stuff gets boring fast.

Even more if you own volumes at home older than the half of the US' history like nothing...

From that perspective, what you want to know and met it's the new, fancy, technological futurist stuff.

The US loved Ultima and maybe FFVI and medieval ARPG's. Europeans... maybe urbanites, townsfolk people loved racing/soccer games and futurist games like Half Life and Deus Ex.