From the HB6 announcement:-
"Pay what you want for *Torchlight*, *Shatter*, *Rochard*, *Vessel*,
and *Space Pirates and Zombies*. If you choose to pay more than the
average price, you will also receive *Dustforce*! And many of the
games come with a breathtaking soundtrack!
Each of these DRM-free games work on Mac, Windows, and Linux, and can
ALSO optionally be redeemed on Steam (if you purchase for $1 or more).
For Linux users, you also have the option to redeem through the Ubuntu
Software Centre. **Please note that the finishing touches for
*Vessel's* Mac and Linux debut are still being completed and it should
be ready in 24-72 hours.**
Bundle buyers can also benefit the Child's Play Charity and the
Electronic Frontier Foundation, two awesome non-profits doing
excellent work for gamers worldwide. (Since the beginning of Humble
Bundle, **with your generous help we’ve raised over $6,700,000 for
charity!**) "
www.humblebundle.com
Btw: 'Rochard' is a great "platform-style" physics-puzzle game....
John Lewis