Well said, Glorb. You've got sequels of certain games here and there in the series, but even then, you don't even really have to play the first one to get the full effect of the second one. For example, I've never played the first Paper Mario (I know. Shame on me.). But I have played Paper Mario: The Thousand Year Door, and I simply love the game. I didn't really miss anything much even though I've never played its proceeding game.