Flame Towers

Flame tower are obtained by upgrading a machine gun into flame tower and then can be upgraded again into inferno tower. This is my favorite tower in robo defense it will take down almost all small ground troops. It works great with the slow tower and there is an upgrade called slow burn that will make this tower do both slow and flame when upgraded to inferno. If you have an artillery tower with napalm shells, which is an upgrade, it can almost completely replace the flame and inferno tower because not only do they do fire damage they do regular artillery damage. They also work great with slow towers.