Including Joystiq Game of the Year awardee Super Meat Boy, terror simulation Amnesia: The Dark Descent, and Gaijin Games' synesthetic masterpiece Bit.Trip Beat, "The Potato Sack" drops all 13 games by 75 percent off their normal asking prices (or 50 percent when purchased a la carte). Considering that all of those games would normally cost around $160 if you bought them individually, you're looking at a savings of approximately $120. Also, you'll do untold wonders for your invaluable indie cred. And hey, if none of that does it for you, there's a potato hat for Team Fortress 2 included.
Also of note, each of the bundle's games have been modified with a potato-themed update -- head to the gallery below for a look at Super Meat Boy and Bit.Trip Beat's starchy additions.
Update: Added AaAaAA!! -- A Reckless Disregard for Gravity to the gallery, courtesy of NoodleGunshot.
[Thanks Joseph Leakey!]