MUTALISK RUSH BUILD ORDER
Author: Daktakpaklak

This build-order is perfect when playing against a Protoss opponent. Most Protoss players tend to wait a bit before producing Dragoons unless a Mutalisk rush is expected. If your Protoss enemy detects your rush, go heavy with Hydralisk (and Defilers if you have time). Against another Zerg, this build-order will work well unless he entirely avoids morphing Zergling and goes straight for Hydralisk/Mutalisk. When facing a Terran opponent, its best to wait the two extra minutes and morph the Mutalisks into Guardians; Marines do extremely well against Mutalisks, especially with Medic support.

Order the original four Drones to gather minerals at separate patches. Morph four more Drones, and send the Overlord to your opponent's base.
When the fourth Drone (8/9 control) has hatched, get it started on a Spawning Pool. Morph Drones until control is exhausted, then produce an Overlord.
Once you've started the Overlord, mutate an Extractor and morph another drone.
The Spawning Pool and Overlord should finish about the same time; once they do, pull four Drones off minerals and order them to gather Vespene.
Morph four Drones for mineral gathering (to replace the workers gathering Vespene).
As soon as you reach 150/100, evolve the Hatchery into a Lair.
As the Lair morphs, spawn a second Hatchery and a couple of Sunken Colonies or half a dozen Zergling, depending on what your opponent is doing. Be sure to have a free Drone and 200/150 on hand when the Lair is complete.
As soon as the Lair is finished, mutate a Spire. Produce base defense as necessary, but be sure to hatch three additional Overlords before the Spire is complete.
When the Spire finishes, produce Mutalisk and attack when prepared.