Protect skyscraper tower with 20 weapons slot from hundreds of enemy waves. There are four game modes in this game: Campaign, Survival, Time Trial and Killing Mode, each mode has unique characteristic.
Move mouse to edge of screen to scrolling the battlefield, click start wave to start the waves. All weapons are automatically fires, protect your tower from both sides, left and right, upgrade power plant to supply power to your turrets, buy and upgrade turrets and place maximum of two weapons, including guns, missiles, rockets and rapid cannons.
See in-game instructions and tutorials for details information.