Technically Guardians of Order and Dream Pod 9 are both Canadian, not American, so you could say BESM, Silver Age Sentinels, etc etc. and Heavy Gear are Canadian RPGs.
In addition to that two of the best RPGs I've run into in a long time are from Spain:
Aquelarre: an RPG set in medieval Spain, with ultra realistic mortality levels, and "authentic" magic system (authentic in the sense that magic works the way the medieval Spanish culture thought it did). This is a truly great game, with a system reminiscent of Call of Cthulhu.
Capitan Alatriste: Based on a very popular series of novels, its a purely historical RPG, and the best "swashbuckling" system I've seen. There's no magic or fantasy in it, its designed for swashbuckling adventure in the 17th century, with a system reminiscent of GURPS.
Nisarg
In addition to that two of the best RPGs I've run into in a long time are from Spain:
Aquelarre: an RPG set in medieval Spain, with ultra realistic mortality levels, and "authentic" magic system (authentic in the sense that magic works the way the medieval Spanish culture thought it did). This is a truly great game, with a system reminiscent of Call of Cthulhu.
Capitan Alatriste: Based on a very popular series of novels, its a purely historical RPG, and the best "swashbuckling" system I've seen. There's no magic or fantasy in it, its designed for swashbuckling adventure in the 17th century, with a system reminiscent of GURPS.
Nisarg