- Nicole Lazzaro theory of fun – http://xeodesign.com/whyweplaygames.html
- Top 10 Video Game Emotions (2008) http://onlyagame.typepad.com/only_a_game/2008/04/top-ten-videoga.html
- Art of Games Design iPhone App (free) – http://itunes.apple.com/gb/app/agd-lenses/id385531319?mt=8
- Coursera Gamification Course by Kevin Werbach- https://www.coursera.org/course/gamification also some great notes http://staroversky.com/blog/gamification-frameworks-and-concepts-visual-summary
- Enterprise Gamification Workshop with Mario Herger (not free) – http://www.udemy.com/enterprise-gamification/
- Must read on Dopamine (It is not the be all and end all!!)