Yes, if the game doesn't have its own DRM or use Valve's (this is admittedly mostly older and indie games these days). You can even use it to manage/sync games/

Yes, if the game doesn't have its own DRM or use Valve's (this is admittedly mostly older and indie games these days). You can even use it to manage/sync games/applications that aren't distributed on Steam: https://help.steampowered.com/en/faqs/view/4B8B-9697-2338-40EC https://help.steampowered.com/en/faqs/view/4B8B-9697-2338-40.... I believe this will actually sync those files to Valve's servers and allow you to install them on other machines with Steam installed. This was a feature to drive adoption in the very early days of Steam when basically all it was good for was downloading Counterstrike patches.