Zadoc's Oregon Trail thread reminded me of this- we're talking mid-late 80s school computers here, Apple IIs and whatnot. Amongst games like Oregon Trail, Number Munchers and O'Dell Lake, there was some adventure game that was kind of like Shadowgate. You got to examine things, move stuff (I think) there were riddles like that "the man in this picture is my son's father but not me" (or whatever) kind, and at the end there was a treasure of gold, and I think you had to select whether to keep it or not... the only thing that sticks out in my mind graphically is a purple room...

Anyone have any idea what I'm taking about?