Steam was nowhere near the app store we know today when it was created. It was Valve's auto-updater and match-making service. They had a few partner games using

Steam was nowhere near the app store we know today when it was created. It was Valve's auto-updater and match-making service. They had a few partner games using it as well. I may recall it badly but I am pretty sure they opened it to general companies and indie studios as a reaction to Windows 8 built-in app store: https://www.bbc.com/news/technology-18996377 https://www.bbc.com/news/technology-18996377