Btw for those who are saying all AAA are US:
Granted that could be the case but I started to get suspicous when I researched some games that I liked, that felt refreshingly different and discovered with suprise where these games came from.
It was quite a revelation when I found out that Mount&Blade hails from Turkey and the Witcher 1&2 was developed in Poland. You can even recognize that Blood Bowl from Focus Entertainment is French.
What I'm getting at is that the US game industry is the biggest in the world, and unless you're only talking about the major studios, it's hard to find anything that all of those games have in common sufficient to count as a national style.
Certainly, not the way that the Japanese have their own style for some genres.
So, I suspect it's not a real phenomena in the way you describe it. Yes, somethings are definitely true, the way we handle WWII and a few other human rights things is likely to be unique to the US, but I don't see those things cropping up very much in any game, certainly not sufficiently frequently to tag a game as American.
It's the mannerisms of the people and the style, as someone else said, you can easily tell from dialogue and the storyline where the city is set. If you think Europeon and American people act similarly, you definitely need to take more holidays.
If you don't my me saying: This discussion has a very interesting developement.
Anyway I can't speak for many American suburbs or cities, but here in good old Europe there is a Huge difference between a Suburb yet alone a citycenter of Frankfurt, Heidelberg, Zürich or Milano. I'm picking these cities as I know them pretty well and because they are only a couple of hundreds miles away from each. Yet they are not only seperated by different nations and language but by an age old tradition longer than the history of modern America itself.
And none of these cities compares to a GTA game, Sim City, the Sims, etc. city I have played thus far.
On an unrelated note, I played xCom EU (Sounds quiet like xCom Europe although it isn't) and was amused to see how they portrayed Berlin in the tutorial mission. The Police cars had the wrong colour, not that I blame the developers, Germany changed their police outfit & design a couple of years back but the roads, the signs even the advertisment boads didn't feel German at all.
It got hilarious when cute and adorable Dr. Vahlen started to speak in German in her Nazi-Flick like accent.
It's still a brilliant game, a game where you can hire different nationalities as soldiers but sadly all of the speak standard American English.
I find the Total War / Age of Empire approach much more fitting where the units are talking the language of their home country.
I know how you feel, as an Irishman...we're nearly always interpreted wrong in every medium by Americans.