I’m quite late to this thread, but I gotta say, Craiglocke I encourage you to write up more from your survey of IF games. If you did an analysis like this on 10-15 IF classics (community or old-school Infocom games) that would make for a wonderful book for would-be game designers. I get that it’s a subjective view point, but I think it would add immensely to the body of knowledge available for designers. Today with sites like Kickstarter for funding and Amazon Createspace for publishing it is much easier to embark down a path of donor funded projects.