Greg Hill's videogame

[Pergamos]

Wikipedia claims Greg Hill was involved with the design of an early videogame, but isn't specific.  Does anyone know the specifics?  And if it is possible to get ahold of it?

[Cramulus]

I recall reading (though I can't find a citation) he was somehow involved in creating the Windows Solitaire

Maybe in the Historica Discordia? I recall a line saying that because of this creation, Greg has helped waste more office hours than anybody else alive.