Ahead of the Steam winter sale and on the heels of the Humble 'Jingle Jam' Bundle, Humble Bundle is holding a hefty indie sale this week. The 'indie mega week sale' is live now and runs through 10 am Pacific this Christmas—Monday, December 25. Standout games include: *  Hollow Knight - $10 at 34% off ; *  Stardew Valley - $10 at 34% off ; *  Undertale - $5 at 50% off ; *  ARK: Survival Evolved - $36 at 40% off ; *  The Witness - $20 at 50% off ; *  Crypt of the NecroDancer - $3 at 80% off ; *  Owlboy - $15 at 40% off ; *  Hyper Light Drifter - $10 at 50% off ; *  Torchlight - $3 at 80% off ; *  Torchlight 2 - $4 at 80% off (RIP Runic Games) ; *  Axiom Verge - $10 at 50% off ; As previously reported, you can also get Layers of Fear and its soundtrack for free. However, while it is included in the indie mega week sale, it's only free through 10 am Pacific tomorrow, Wednesday, December 20.   Some online stores give us a small cut if you buy something through one of our links. Read our affiliate policy for more info.