As Sam Fisher, you are out to save the world from international terrorism. In doing this, stealth is of paramount importance. Splinter Cell makes terrific use of light and shadows in this regard. If Sam Fisher stays in the dark, he is less likely to be seen; but, equipped with night vision goggles, you are not hindered by the lighting effects. It's a clever system that creates some memorable scenes and adds to the sensation of being undercover.
Tom Clancy's Splinter Cell is a supremely balanced game. The initial training received is just long enough, gameplay is perfectly weighted between stealth and action, and the blend of different objectives in missions ensures that the experience never becomes a chore. More than being merely balanced, though, Splinter Cell excels in all areas. This is as compelling a spy game as you'll ever play. --Jonti Davies
There are negetive sides to the game as well. You have very few choises as to how to complete your mission. The doors you don't have to go through are only there for the looks. You cant even choose where to shoot someone to kill them. Only the headshot kills immediately. There is no point in trying to aim for the heart. Also the bodies you keep carrying around goes through walls if you put them to close.
Many reviewers put Metal Gear up against Splinter Cell. I think they are to different to compare against each other.
The story is good and the voicework is top notch. If you like stealth games and haven't tried it yet, go for it. But if you are looking for a shooter, I would recommend Doom instead.