For the next two weeks Voxeltron will be priced on a special "pay what you want" offer, where as you pay minimum of $15 with a choice to divide the cost amongst charities and the game developer
http://www.humblebundle.com/

Those of you who don't know, Voxeltron is a classic top-down voxel themed shooter for the PC, Mac, Linux too

The Humble Voxatron Debut(Gameplay) - http://www.youtube.com/watch?v=cyQaS76k59g


Game runs on any system 1GHz and over with no defined graph ics card