Well, not really. But those of you genuinely interested in game design, I really do recommend that, no matter how much you hate text interfaces, you Give Mud A Try. It has an in-browser client that makes it less painful than playing in telnet.
MUD1 is a fascinating insight into the transition from Single- to Multi- player. It is, undoubtedly, a terrible multiplayer game. It nearly brings me to tears writing that. I don’t care if you’re Raph Koster and never played MUD1 before developing Legend, you will have been affected by the lessons learned in MUD1 either in the design of your MUD lib or in the ideas and expectations your players brought in the early days. The same way that Meridian 59, UO and EQ have affected every MMO game since, even if the developers never played them.