openmw.org/faq MW GOTY is available DRM free from GOG for 19,99 €
http://www.gog.com/game/the_elder_scrolls_iii_morrowind_goty_edition
You mention Steam but I think there are good reasons to mention that MW-GOTY is available on GOG too.
(RM-2957 from redmine: created on 2015-10-05 by Who Knows, , closed on 2016-11-27 by bret curtis)