After our teachers' midyear ICT seminar on 4 May 2009, I was inspired by one of the exhibits, MissionMaker 7 for educational game creation, I decided to look for free stuff.
Adventure Games Studio looks like a good bet with a lot of tutorial videos on how to use it!
http://www.adventuregamestudio.co.uk/acres.shtml
You should go try it out too!
Another exciting possibility is the Adventure Game Maker which can make games for iPhones!
at http://www.adventuremaker.com/
