StarCraft: Brood War/Zerg Mission 2: Reign of Fire

Guide: Fastest way to win
As soon as you gain control of the Hunter Killers, the Torrasque, and the Devouring Ones, clear up the left side of the map, but be sure to stay out of the Terran Base. Build two hatcheries (not at the same time though; once you control a drone, at least one drone must live or the game will fail you). When the hatcheries finish, start making an extractor, drones and overlords, as well as a spawning pool. When the pool finishes, upgrade both hatcheries to lairs. When they finish, evolve overlord transportation and speed. When you get 24 speed upgraded overlords, load up your hero zerg units, fly up the right side of the map, and charge right through the Terran Base, dropping your hero units on the Psi Disruptor. They are extremely hard to kill, and will make quick work of the Psi Disruptor.