Global Game Jam 2013 - Madrid, Spain http://www.gamejam.es/
In a Game Jam, participants come together to make video games. Each participant works in a small team on a complete game project over the course of a limited time period, usually over a weekend. With such a small time frame, the games tend to be innovative and experimental. The Global Game Jam (GGJ) is a game Jam that takes place in the same 48 hours all over the world!