It is the future, and robots have taken over the world. Now they are trying to traverse your path and make their way to the other side of the map, and you can't let the happen! Build up your robot turrets in order to defeat them as they make their way down the path. Click to build turrets and place them, then place walls to help funnel them towards the bulk of your troops until you have defeated wave after wave and the only one left is the boss. Then bulk up your defenses and defeat the other robots once and for all.