There is plenty of FLOSS on Steam. Though, from the sounds of it, I'm not entirely certain that the difference between being without cost and being without limitations isn't lost on this mailing list.
On Wed Feb 18 2015 at 11:44:48 AM <onp...@riseup.net> wrote: > I think Naev is on Steam, for example. (Or if it isn't, it was at one > point.) >