One of the greatest adventure titles out there
Now, I know many Zork fans bash this game for its' decidedly dark tone, but if you can get over that fact, it's one hell of an adventure game! This is one of a few games ever made that handles Full Motion Video (what we call it when actors are filmed and on-screen inside the game) extremely well. There's absolutely no performance that's done ham-handedly.
The story, enviornments, puzzles (frustrating yet brilliant at the same time), and music are all perfectly crafted. It's harder to get much better than this! It's a shame that Activison put the golden goose out to greener pastures as early as it did, because if they had continued in the direction they went with this game and Grand Inquisitor, I am almost certain that the Zork franchise would rival even the Myst franchise!
Just a small warning: KEEP YOUR CHILDREN FAR AWAY. This game has some extremely disturbing images that, coupled with the actors, seem very real and send a chill down your spine. This game will traumatize your child if he plays it. I should know; I played it at my granddad's house, and it scared me like nothing has ever before. Other than that, get the game if you can find a copy and get it working under your computer (may take a wee bit of tinkering with system settings). You won't regret it!