5th European Conference on Game-Based Learning (ECGBL 2011), which is being held at the The National and Kapodistrian University of Athens, Greece on 21-22 October 2011.
The full call for papers is available at
http://academic-conferences.org/ecgbl/ecgbl2011/ecgbl11-call-papers.htm
Abstract submissions are due on 31 March 2011.