|The Humble Weekly Sale: Puppy Games|
|Available||Dec 19, 2013 — Dec 26, 2013|
The Humble Weekly Sale: Puppy Games was the thirty-first weekly sale from Humble Bundle. When sales exceeded $170k, source code was unlocked for all the games.
Purchasers could pay as low as one penny to buy this bundle. Paying more than the average added Steam codes for each of the games.
Separate Steam keys were provided when purchasers beat the average.
All of the games were available DRM free.