STEM is a simple open source flash based system for developing simple branching stories and games. Some of the projects we have used it included Responsible Service of Alcohol training, Telephone Counselling skills for LifeLine Tasmania and a business training program for Electricians. This is the presentation that I did for the Sydney Serious Games BarCamp. During the the session I’ll talked about why I started to develop STEM and what I’ve learnt about developing branching stories and games. I plan on writing up what I said into a couple of blog post at http://www.sproutlabs.com.au/blog/