Diskworld Noir is a parody of film noir style detective movies. it is set in the strange world of author Terry Pratchet's imagination. I have never read one of the 'diskworld' novels, but the manual that comes with the game gives extensive background on this fictional world inhabited by humans, trolls, vampires, and the dead. (and even The Grim Reaper himself)
Diskworld Noir is a traditional 'point & click' adventure game, with most movement and inventory controlled with the mouse. You play a "down on his luck" Private Eye named Lewton. (is there any other kind of Private Eye??)
His assignment as the game begins is to find a missing person. You explore various locations in the game, choosing your destination from the game map, which shows new locations as they are discovered. you meet and have conversations with many strange characters. Conversation topics are selected by choosing them from Lewton's notebook. The notebook is automatically updated when anything of importance is discovered. This is one of those games that gives you a little audio and visual clue when you have discovered an important fact.
About 1/2 way through the game, there is an unusual plot twist that gives your character some new abilities to help sniff out the bad guys. I won't give it away and spoil the game, but those who have played this know what I mean!
The game setting is dark and rainy "Ankh-Morpork", one of the cities on the 'Diskworld". The animated graphics and setting are appropriate to the atmosphere of the game.
I enjoyed this game much more than I expected to, and I was sorry to see it end. The game was produced in England, and was not marketed extensively here. . If you can dig this one up somewhere, I highly recommend it.