The amount of games developed during one GGJ weekend is staggering. The amount has grown each year from the 370 games during the first GGJ in 2009 to over 2100 games done by over 10 000 people during GGJ 2012! If you want to try out the games from all over the world, you can find them all from Global Game Jam’s games section.
Finnish Game Jammers have created a great amount of games as well. See the games on their pages: