According to ESRB, this game contains: Animated Blood & Gore, Animated Violence
First off let me state that parents should know that this is not a game for kids. There is explicit language, lots and lots of blood, and horrific sights throughout the game.
Secondly, if you don't have the 4MB memory pak, you'll hardly get anything out of this game because without it, Shadow Man becomes a blurry mess. Though, I guess, a huge big-screen TV would help and your eyes will indeed thank you for it.
If you're looking for a better time in the afterworld and already own a PlayStation, then I suggest you get Legacy of Kain: Soul Reaver. And speaking of PlayStation owners, the game is identical except for the usual: better audio.