Tower or turret defence games not fast-paced games but they are definitely strategy-based games. While playing this particular online defence game, the game offers plenty of units and turrets that you can deploy in the best possible positions to kill the invading waves of the enemies. The units can be placed using the computer mouse but you ought to think before deciding on the position. Let no enemies get through to the end of the tracks. The game offers so many upgrades that help you when the challenges keep increasing. Have fun playing this addictive top view online tower defence game.