via Steam. In fact, it's being discounted 75 percent in a launch promotion, meaning you can snag a copy for a paltry $2.50. It's a SteamPlay release, so you get both the Mac and PC version in one purchase.
It's a fun, totally charming game that we'd never have guessed would be the precursor to Klei's most recent release: the blood-soaked, hardcore action title Shank. They're ... what's the term? ... oh yeah, polar opposites.