Broken Age is no longer launching as an Early Access game on Steam, instead hitting as a full release with a season pass that includes parts one and two.
"You may recall that at one point Broken Age was planned for release under the Steam Early Access program," Double Fine wrote in a backers-only update on Kickstarter. "This is no longer the case. For various logistical reasons, and because we believe Act 1 is a polished and satisfying piece of content in its own right, Broken Age will be a standard Steam release that includes a 'Season Pass' granting access to Act 2 once it is complete. Anyone who has Act 1 – either by being a backer, or by buying the game separately – will receive Act 2 as a free update when it's ready."
Double Fine announced in July that it would launch Act 1 on Early Access, intending to raise enough money to complete and release Act 2, but a season pass launch can achieve the same end. Backers of the Double Fine Adventure Kickstarter have access to Broken Age Act 1 today, distributed via Steam keys on the Humble Store. Act 1 requires Steam to download, though once Act 2 launches, a DRM-free version will hit Humble.