I remember seeing "Choose Your Own Adventures" early in the 80s and thinking "Hmm.. Zork sure would be cool if it had a few pictures like the CYOA books." And of course, about a month later I saw the first text adventure with illustrations. I don't think I ever played Twin Kingdom Valley, but after reading the wikipedia page, I sort of want to now. Oh... aha!

https://archive.org/details/d64_Twin_Kingdom_Valley_1987_Bug...