The Sinclive Diamond has been stolen from the Jewel Room of Spectraisia's Capital, Microdrivia. It must be restored in as short a time as possible, before the public begin to doubt its existence, but where in this city of death and intrigue is the stolen Sinclive Diamond?
Notes
Diamond Trial may well be the very first commercial adventure written with The Quill (Tim Gilberts was one of the founders of Gilsoft, publishers of The Quill).
The Atari version, and possibly the C64 version, may be unofficial conversions.