The Humble Double Fine Bundle has crammed in eight more games today, a collection of Double Fine Amnesia Fortnight prototypes - the results of annual internal gamejams at Double Fine. All eight games are Windows PC only, available to all who plunk down more than the average $8.15 (at time of this writing) for the Humble Double Fine Bundle.

The Amnesia Fortnight prototypes include: Autonomous, a first-person sandbox game set in the future; Spacebase DF-9, a top-down simulation where you construct and maintain a space station; Black Lake, an adventure game set in a dark forest; The White Birch is a 3D puzzle-platformer set in a massive tower; Brazen is a co-op action game where four players team up to take on monsters; and Hack-n-Slash is a Legend of Zelda-inspired 2D action-adventure game.

Happy Night, a prototype from 2007 and the precursor to Sesame Street: Once Upon a Monster, is also here, as is 2009 prototype Costume Quest, which eventually became, well, Costume Quest. Finally, there's the 2 Player Productions' documentary compiled during Double Fine's Amnesia Fortnight event in 2012.

The Humble Double Fine Bundle was introduced last week, as an initial collection of the studio's most recent works: Psychonauts, Stacking, Costume Quest, Brutal Legend and a pre-order for Broken Age, the studio's Kickstarter-funded adventure game. The Humble Double Fine Bundle comes to a close in six days.