This excellent tower defence game is played in campaign mode or sandbox mode. The interactive online tower defence game has elaborate tutorial to help you get the hang of the game play. Place turrets and towers in tactical positions to stop the invasion of the weird but deadly creatures that come in waves. There are repairs and useful upgrades that should be used wisely so as to defeat all the enemies. The top view game will have you plan your move to outsmart the enemies who seem to increase in power and number every passing moment. Use the mouse to interact and play the game.