In the game, you play as a stranger who has traveled to the mysterious island of Myst. There, you find a series of books that an explorer named Atrus has left on the now uninhabited island. These books allow you to travel to other worlds, and each world provides you with clues about what has happened to the game's characters.
Myst is a thinking game. This is one of those games, that after staying up for hours struggling through a puzzle, you shout "YES!! I'VE FIGURED IT OUT! I AM AWESOME!" in satisfied glee after finally getting it, thoroughly startling your roommate (or parent, or sibling, or dog, etc.) who had been sleeping in the next room. And no, using a walkthrough is not allowed.
Though the graphics aren't that great now, they were pretty awesome at the time. I still think the island and the different ages you visit are beautiful and convincing in their other-worldliness.
This is another one of those games that both gamers and non-gamers would enjoy. It is unusual in that there is no objective laid out for you at the start; you are free to wander around and figure out what you have to do. There is no time limit. There is no apparent enemy for you to fight and no violence. Myst is about enjoying a fascinating story as it unfolds through your discovery, observing, critically thinking, and puzzle solving.
I am not alone in my appreciation of this game either, as Myst was a hit when it came out, becoming the best-selling PC game until The Sims surpassed it in 2002. It has also gotten four sequels, which I have yet to play, but am looking forward to when I can find the time.
Played Myst? Going to play it now? It is relatively inexpensive on Steam, if you are interested in challenging your mind with this great game.