On: Portal Released For Steam On Linux

[csense]

They sell both DRM-enabled and DRM-free games. The DRM-free games are tagged as such, and when browsing the catalog, you can filter on this trait.

[shmerl → csense]

That's surely better than Steam already, which doesn't help filtering DRM free titles. Though Steam in general imposes its client DRM, even if the game itself doesn't use some heavier forms (like on-line type).