PC Game Classics

I have fond memories of some of the first games I've ever played and really enjoyed, as I'm sure most gamers do. Some of the early games I've played have included a game called MOO. My father used to bring home an old dumb terminal from his work that didn't even have a monitor. We'd call up the mainframe at his work, and plug the phone in to the back of this big beast. Then, the output would be typed onto a form feed style printout. Really ancient. This game is basically a word guessing game.
Now that I've really dated myself, I'll mention some of the other early pc games I used to play and somewhat miss in these days of cookie-cutter FPS and MMORPG games. I was always a fan of almost anything that came out of Sierra since the King's Quest I days, playing on a friends IBM PC jr. I loved all of these games, especially the Police Quest and Space Quest series. For those who used to be fans of Space Quest, someone developed somewhat of a sequel that you might want to check out Space Quest 0: Replicated. Also, there is a company out there called Tierra (copyright issues here?) that has remade a few of the earlier Sierra games. I've played them and they are fun, but the writing isn't quite as enjoyable as Sierra's story lines., since they have modified the games a bit.
Any other classic game fans out there? Let me know your favorite classic computer games.

While I'm on the topic of games, there's another great game I used to play back in the days of BBS', called TradeWars 2002. I LOVED this game. This was an incredibly fun, yet sometimes painfully slow, door games. Please leave your comments and any links you may have to some classic gaming sites. Game of Rogue anyone?