To build over the supply limit of 200, have your Dark Archons mind controlany protoss unit, and you can do this just as much as you want! To build over the 200 supply limit of the zerg simply have at least 8drones and a whole lot of minerals. Next mutate them into a cheap buildinglike a creep colony and rush back to your Hatchery ( Lair or Hive) and findany larvae and mutate it into the unit that you want and then while it ismutating stop the drones from finishing and ta-da!Sadly, there is no way to build over the 200 supply limit as Terran.