0
Discworld Noir happened in 1999.
Discworld Noir was created on 1999-07-05.
There is but it's a MUD (text based game).
There are also several Discworld board games (such as "Thud!") and Discworld video games for PC, Playstation, etc (such as "Discworld Noir").
The Discworld Companion has around 344 pages.
The Art of Discworld was created in 2004.