@Felthry depending on the content, a proper localization (as opposed to simply translation) may be necessary for the game, I suppose? there's also additional distribution costs, marketing, etc. though rly i'd generally assume most games would only gain from having an american market, so im also a bit perplexed..
@FragileVal I mean there aren't many games in that category, we can only think of Terranigma, but it's weird nonetheless.