Abandoned, Lost, Orphaned, and Missing IF Works

This is a list of some interactive fiction games and other works, written by other authors, that have somehow fallen between the cracks, as it were. These games were on the internet at one point, but whatever webpage they were on has since disappeared, and they weren't backed up on IF Archive or anywhere else that I know of. (Some games may still be on their original websites, but such obscure websites where almost no one will ever find them.) But if I have a copy of any of these rare games, I'll make new unofficial homepages for them, in case anyone else wants to play them. Hopefully this is a good idea?