Wow… Following a general Douglas Adams (RIP) thread I came across a site dedicated to Wowbagger the Infinitely Prolonged. This site actually has a very detailed and well put together COM object to allow you to assist Wowbagger in his quest (which was to insult every living thing in the universe, in alphabetical order – reference).
Anyway, the links page of the wowbagger site has a link to a Java version of the Infocom Hitch Hikers Guide to the Galaxy Game. Mint. (Made all the better by the fact that I was once employed by an Infocom – although sadly not the same one).