Description
It's an Action Tower Defense game based on frenetic shooting mixed with strategy and upgrades. The Earth is being attacked by an Alien Empire. All nations started working together to create the best defense system humankind could possibly assemble. Great offense turrets were created to attack any incoming threat! You are the chosen commander to take control of them and bring hell to outer space!
Go to: http://store.steampowered.com/ and download STEAM client
Click "Install Steam" (from the upper right corner)
Install and start application, login with your Account name and Password (create one if you don't have).
Please follow these instructions to activate a new retail purchase on Steam:
Launch Steam and log into your Steam account.
Click the Games Menu.
Choose Activate a Product on Steam...
Follow the onscreen instructions to complete the process.
After successful code verification go to the "MY GAMES" tab and start downloading.
