Discworld mud
Discworld mud is a multiplayer, text-based online game based on the discworld books as written by terry pratchett. on discworld you will meet many of the characters from those books. terry's books are humorous fantasy and the game retains the comical, fun feel of the books.
http://discworld.imaginary.com/
Gurps discworld
gurps discworld
http://www.sjgames.com/gurps/books/discworld/
Gurps discworld also
gurps discworld also
http://www.sjgames.com/gurps/books/discworldalso/