The Grim Fandango that nobody played. Nobody played it back when it came out and nobody's playing it now, because it's abandonware and not easily accessible for the public at large. Which is a dang shame, because much like GF, Discworld Noir is a detective game steeped in thick atmosphere and boasting a witty script, a colourful cast of characters and an intriguing story that alternates between being broadly comic and deadly serious. It deserves not to be forgotten about and I hope one day it'll receive the same treatment that many of Lucas Arts' classics of the genre have gotten.

By the way, take my advice and avoid the PS1 version at all costs. It is a dreadful port. Get the PC version operational or don't bother at all.