Play around with some of the studio's unreleased ideas
A week ago, the Humble Double Fine Bundle was announced. For some, it was easy to resist; though the games on the list range from decent to great, fans of the studio already owned most, if not all of the titles. Of course the Humble Bundle people are going to add some more stuff a week in to keep the interest high. Of course. That's how they get you.
Double Fine is known for taking a few weeks to prototype new ideas every so often, and joining the bundle is a group of eight prototypes that haven't yet seen the light of day, as well as 2 Player Productions' documentary on Double Fine's Amnesia Fortnight 2012. Customers who pay more than the average (which is currently sitting around eight dollars) get all of the prototypes, along with most of the games and soundtracks from the original bundle.