There are some games on the market which are run directly from a website. You have to log in there and press play. Then the process is created on your computer and you can normally play it as if it was run from .exe. It actually is run from .exe but the game opens only if I load it through website. Running the .exe alone won't open the game. How is it all done? Is the .exe somehow packed and the site unpacks it somehow? I would be very grateful for some brief explanation or articles!