Eighty metres of walking artillery, and it is made of parts you can break one at a time. Drag to select your people. Right click a part of the machine to send them at it.
Break a leg and it limps and shoots badly. Break a hopper and its guns starve. Break the shield and the reactor is finally something you can touch.
Every class is strong against one thing and useless against another. Sending everyone at the same part loses. Sending the right people at the right part wins with your squad intact.