Time-Tested Gaming
1up has an interesting piece looking at games that have withstood the test of time, aging gracefully where others have not. Titles discussed include the Korean powerhouse Starcraft, Nethack, and the Sim series. From the article: "It's hard to label which games are suitable for repeated lovin' and which are forgettable. One gamer's Halo is another gamer's Superman 64. But when it comes to firing up a favorite, some adventures hold the same appeal they did when they were released years ago -- and jumping in for the fortieth round is every bit as pleasurable as the first time."
The first game I thought of was Zelda, but it was nowhere to be found in this article.
I have followed Zelda games ever since I was a child, and even today, tons of people follow it. It was simply a perfect game. There's a community online that makes their own quests with an engine:
http://www.zeldaclassic.com/
Also, a person has redone the original NES rom and made another game that's fantastic on its own:
http://rha.cymoro.com/zelda3c/ZeldaC/