Pay what you want for the Humble Voxatron Bundle, and one game isn't the only thing you're going to get. The folks at Humble Bundle have tacked on Edmund McMillen's twisted roguelike, The Binding of Isaac, and tetromino platform puzzler Blocks That Matter to the package. It's more worthwhile than ever to pick it up now.
Voxatron, if you must know—and you should—is a voxel-based old school Zelda-esque game with platform physics. The game's currently in Alpha, and will be continually updated as development continues.
We're no strangers to The Binding of Isaac here on Gameranx. It's a twisted little roguelike that pays tribute to both The Legend of Zelda and Robotron, marrying the game mechanics to a gothic setting that would give make Tim Burton proud. The newly launched Halloween update, free for owners of the game, extends the Binding of Isaac by a third of its content.
Last, but not least is Blocks That Matter—a platform puzzler/Tetris mashup, players take on the role of a Tetrobot whose robotic drill assimilates blocks of varying materials and properties to create tetrominoes that allow you to solve puzzles and progress through the game's various stages.
Don't accept knock-offs. Get the game directly from Humblebundle.com and support charitable causes like Child's Play and EFF while you're at it.