SteamWorks and Steam Cloud support?

[Genexi]

How about the recently announced Steam Play support?

Given Valve is releasing the Mac build of their digital distribution platform today, getting a mac build of the Penumbra Collection would seem like more potential revenue, as well as treating PC owners with the ability to play their purchased title on their Macs as well if they own one.
(and possibly Linux as well if some rumors end up being true)