I imagine there’s some informal case law for IFDB over the past mumbley-whatever years that deals with these questions, but I can’t find any:
Sierra AGI games (early King’s Quest, Space Quest, etc.): Why aren’t they listed? They don’t fail rules tests like “entirely graphical adventures” or “significant text component” (there are plenty of text descriptions, and plenty of non-optional parser input). I’ll go on to chip away at this with missing ICOM titles like Deja Vu, Uninvited, and so forth (text descriptions, text represents actions, etc.) but first things first.
Original authors of adapted works: This one is bemusing. A few months ago I added a bunch of adapted works, crediting the code/design teams but not the authors of the original flat text. Someone came along and amended all these entires to add the original authors. “Okay, if that’s how we do things here, I’ll play along” said I, and adopted that approach in my workflow. Recently, someone else came along and removed the original novel author from a more recently adapted work I added. So it looks like there’s need for actual consensus on this point.