Physical or digital copies available
Remember Double Fine's Amnesia Fortnight game jam, that lead to the prototypes of many of their successful games? In 2012 a digital collection of those prototypes was created, but now, you can get your hands on a physical copy as well, straight from the Double Fine's website.
You'll get the five Amnesia Fortnight prototype games: Autonomous, Black Lake, Hack N' Slash, Spacebase DF-9, and The White Birch.
You'll also snag a few bonuses as well, like prototypes for Brazen, Costume Quest, and Happy Song, along with a soundtrack and documentaries. It's available as a Steam/DRM-free download for $9.99, and as a physical copy for $30, among pricier options.