Flare Towers

The Flare Tower in robo defense effects all who walk over it with slow and fire damage. You obtain it by buying a slow tower upgrading that to a mine tower and then upgrading that to a flare tower. I would say it is one of the better the towers in the game. They only attack ground troops and they can replace flame towers and slow towers in your map. I would consider them better than either of them because one they attack all who step on them and two they are far cheaper than flame towers.