Game jams here in Europe are this weird thing. You meet up with people to develop a game in a really short time, usually something between 24 and 72 hours. Most jams have a theme that the games should be about. It's either something very open or something very silly. I attended three game jams so far, the last one being at the Blekinge Institute of Technology in Karlshamn, Sweden. You can download the games from the jam here – there's some quirky, funny stuff in there.