The goal of the game is to protect your software from harmful threats: adware, spyware, viruses, etc. To kill security invaders you must build security shields on the game desktop. All invaders, except viruses, can’t go through the shields.
To play these super cool games, you need to enable the Flash plugin in Chrome, the browser you're using. If you see either or on the left side of your address bar, click on it. It will display this menu: Activate Flash in Chrome and enjoy our games!
The Flash plugin may need to be activated in your Chrome settings. Don't worry, it's easy: