User blog comment:The Rim of the Sky/Classic Elder Scrolls Games Now Available at GOG.com/@comment-1918232-20150829080841

Just a heads up that Arena and Daggerfall are free to download from the official Elder Scrolls website, and have been for a long time. No need to make a purchase on GOG or anywhere else to get them:

http://www.elderscrolls.com/arena/

http://www.elderscrolls.com/daggerfall/