If you've decided to start off the new year with soiled undergarments, this deal is probably the best and cheapest way to accomplish this. The latest Midweek Madness deal from Steam provides both Amnesia games for under a tenner, providing a tidy saving over getting each one individually elsewhere.
The Dark Descent is admittedly the superior scarer of the two, but the world crafting in A Machine For Pigs is expertly done and certainly worth the price of admission with this bundle deal. That and, you know, it has a machine. FOR PIGS. Thanks to Shadow90 @ HUKD!