Stores like Apple TV, Vudu, or Amazon Prime only sell streaming files (heavily compressed), not true BluRay encodes. They are labeled "HD" or "1080p" but are BluRay quality.
Later reissues of Season 1 (2015 onward) added audio, but the original DTS-HD MA 5.1 track remains spectacular. game of thrones season 1 720p bluray
According to official listings from Amazon and Blu-ray.com , the standard retail set includes: : 5-Disc Blu-ray set (BD-50). Stores like Apple TV, Vudu, or Amazon Prime