Escape the room games are adventures in my book.
One of my favorites played like a mini Rhem game. It's called In Cubation.
http://www.newphazedev.com/incubation/
It is very good and quite challenging.
There is a good list of free games here, some of which are 'Escape' games.
http://www.gameboomers.com/FreeGames.html
