This is how to Save online Flash games to your computer to play OFFLINE! Now, you should have TWO folders on your desktop (or wherever you saved it). Play Desktop TD Pro: Sequel to one of the most popular tower defense games offers more game modes including sprint, sandbox, multiplayer and scenarios. You're in luck--you can download almost any Flash game to your PC or Mac to play offline. All you'll need is a web browser, a favorite game and a few moments.