What is so good about Interactive Fiction?
Interactive Fiction games are good for the same reason books are good. They are stimulating to both the imagination and the intellect, and provide a little escapism for those who enjoy reading. (If you do not enjoy reading, you may want to try a site that provides you with alternative media.) Plus, if you are playing at work, it shows up as a text screen, and nobody will know you are playing games on the companys dime unless they actually read the screen over your shoulder. No boss key required.
