The games of the guest characters from Super Meat Boy's PC release are being discounted by 50 percent this week on Steam. That list includes such notable titles as Aquaria, Bit.Trip Beat, Bit.Trip Runner, Braid, Gish, Machinarium, VVVVVV, and World of Goo.
When all of those games (plus Half-Life 2) are purchased as a bundle, the reduction in price jumps up to 75 percent off. That's $24.99 for a respectable library of modern favorites, in addition to the original soundtracks for Super Meat Boy, Braid, Machinarium, and the two Bit.Trips. Not bad.