I am not sure what rates as a one hit wonder in games, and indeed as long as games don't seem to have a director that is considered in the same line of thought/importance (an auteur game director is something of the exception rather than the rule). And with the exception of a few Square Enix and similar game companies in Japan I am as likely to know the names of programmers as I am of game creators and directors/producers.
Others have gone with game that did not get any sequels. Vagrant story was mentioned but the director/producer/writer also did Final Fantasy Tactics, various Tactics Ogre, a bunch of FF12, Madworld and a few other things of some note. Similar story for the programmer. Depending upon the person you are speaking to the Final Fantasy Tactics and Final Fantasy 12 also take place in the same universe. That might be tenuous and somewhat different play styles but ignoring Shining the Holy Ark did Shining in the Darkness ever get a sequel if we go like that? There are direct story/plot sequels there though. Move into something like heroes of might and magic and the RPG might and magic...
I am not especially bothered and certainly don't need hard lines in the sand but I find it harder to define a one hit wonder for games.
On Tetris I really like Tetris 2, also Tetris DS and Tetris TGM.
Anyway I am going to have a little a little think about this and come back with something.