If you've never played a Text Adventure Game (a.k.a., Interactive Fiction), then you don't know what you're missing!
I have a vested interest in this genre because I grew up on these games, and was so interested in their inner workings, that I coded a Z-Machine interpreter (emulator) in C# (which I then showed off the power and ability of SQLCLR to use existing complex business logic by running the emulator entirely on a SQL Server).
At least one other person that I know of is also interested in this genre of entertainment, and has given presentations around a tool used to create your own stories.
UPDATE: Many people coming to this page through Google may be interested in the following GotDotNet workspace:
Tuesday, November 15, 2005