Into the game, you will become a defender, return to the age of war, defense the enemy wave of attack.You can use submachine guns, heavy machine guns, grenades, mines, rockets, and other weapons to repel an enemy.Reach level S to unlock the next battle map。Towns, wilderness, caves, battleships are all your battlefield.As more and more enemies become more and more difficult, defenders never back off!

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.