The latest bundle includes Torchlight, Rochard, Shatter, S.P.A.Z. and Vessel along with a download of the soundtrack for each of the titles. Users who pay over the average will also receive the game Dustforce as a bonus.
Each game is available for PC, Mac and Linux, with users receiving a DRM-free download on their preferred system. The exception is Vessel, with the developers still working on the Mac and Linux versions, although it "should be ready in 24-72 hours".
Users who pay at least $1 also receive a download code to redeem the bundle through Steam.
As with past Humble Indie Bundles, users have the option to pay what they want, and they can choose how the money is distributed between developers and charities.
In its first day, the Humble Indie Bundle 6 has raised nearly $500,000, from over 88,000 purchases.
The last Humble Indie Bundle set a new sales record, grossing over $5 million in two weeks.
The Humble Indie Bundle 6 will be on sale through October 1.
Watch the trailer for the Humble Indie Bundle 6 below: