Anyone have a game you really enjoy and. . .?

You don't really tell anyone about it. Because it is like your little hidden gem you don't want to risk being tainted by letting other people know about it? I know, odd question and pretty selfish one, but come on! We all have the under appreciated or hidden gem no one really knows about and you hope it stays that way. Mine happens to be a old PS1 RPG, did well, but it is quite rare now. And out of all the games I own old and new this would be the game I could take to my grave if I was that obsessive compulsive. Anyone else have a game old or new that is their hidden gem?