Being a 90s kid, this was a must-have for me and I LOVED this game.  Unfortunately, I lost the disc several years ago and have been without it since, until recently when I purchased a copy from Amazon.  This is undoubtedly the best game I have ever seen, especially for PS1, since most of those games are quick and easy.  Quite the opposite with this game.  I've only gotten halfway through it because the bosses are SO hard.  Try playing Anubis Rex and/or Space Galaxian and you'll see what I'm talking about.  This game may have been released for other game systems, but none retains the quality and feel that the PS1 version does.  (By the way, if you buy this game, Ms. Pac-Man Maze Madness is the perfect complement to this one.  It is also quite complex for a PS1 game.)  Yes, there still are new Pac-Man video games being produced all the time (recently, Pac-Man and the Ghostly Adventures), but none have the feel of this one.