This was not the best mystery/adventure game I've ever played, and I'm not even a big fan of such games to begin with, but I am a serious X-Phile.  Despite the seven CDs full of Full Motion Video than make up the game, it wasn't a whole lot like being in an X-Files episode.  Instead, it was more like being one of those "other agents" who make brief appearances two or three times per season.  You actually have to do some of the tedious legwork to collect evidence instead of having it conveniently handed to you after the commercial break.  Of course, the up side to that is a more immersive, believable feel to the game and a feeling of accomplishment when you finally do spot the crucial clue.