"To help the world prepare for the big finish of Penny Arcade’s On the Rain-Slick Precipice of Darkness series next month, the penultimate game is available for free. Demonstrate your humanity and you can have one."
This is for today only I believe and they're giving them away until they run out of keys. You might need to keep reloading the page to get in.
Edited by BMXJouster, 21 May 2013 - 08:38 PM.