I did not know that. I’ve seen Alice is Missing on THE HOTNESS list over on RPG Geek frequently, but never checked it out before. I just read through a PbF (Play By Forum) game of it and it reminded me of another PbF game I had read of “The Wait” by Travis D. Hill.
And speaking of “play by text,” Travis has an even more similar game, “Chain Mail.”
Here’s the publisher blurb about it:
“In Chain Mail, you and your group are joining forces to create the best genre story possible. Remember those wonderful story-telling experiences where you go around the circle contributing a few sentences to an ever-growing, changing, and evolving story? That’s Chain Mail. But it’s happening the old fashioned way: via old fashioned, on paper, stamped and everything mail. However, there are a few things to help guide you on the path.”

As I played, I also saw the similarities with Microscope, which I tried out but couldn’t get into. Icarus feels like a guided, linear version of that game.