Zork-the unnamed game
It is very impressive this game was finished and ready to play in just 6 months. It is also amazing how big of a hit this game seemed to be at least through MIT. We as a culture today are always looking for games with better graphics and more realistic simulations. This game had no graphics and was a simple command game. Also the game was a hit for a full 4 years. Now must of us will still play games that are 4 years old but I believe we do not play with with regularity and games that are 4 years old are not top sellers. I also like how they explain Zork as a game that people felt they could connect too because it was almost like talking to another human. When you would type in a command the game would listen and respond back to the command. I think this is a huge reason why Zork was so successful. People enjoy games they feel like they can relate too and connect with.
http://jerz.setonhill.edu/EL250/2010/01/case_study_zork/#comments
I was also stunned to learn Zork was completed in only six months. Of course they didn't have any graphics to mess with, but to get it all up and running is impressive like you said.
I guess connection builds communication. That's important in gaming societiess. Noone wants to feel alone.