QCF Design announced that the beta version of its IGF award-winning roguelike Desktop Dungeons is free to play during the week of the Game Developers Conference (through March 31st).

Note that you'll need to complete a quick (and free) signup in order to participate, but if you haven't yet had the chance to try Desktop Dungeons, now's a great time to do so! If you want to continue playing after GDC ends, you can regain access to the beta by preordering the finished product for Windows and Mac.