While some of us might agree that PC and Console games do have an overwhelming bias towards the US (dammed yankee imperialist cultural hegemony
.... :P ), the fact reamins that most of the games are either developed by US companies or for the US market (still regarded as the market to sell into). The situation is somewhat similar to that of Hollywood, it makes films overwhelmingly about US topics/subjects and yet sells them allover the world.
That said, the US submarine campaign against the IJN and the Jap merchant fleet is still the only sucessful submarine campaign in history (in that it emasculated the jap war economy and materially contributed to the victory of the US). For this reason alone i'd buy SH4, plus the fleet boats were magnificent subs, bristling with the allies latest electronic gear by the end of the war.
Sniper_1