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This article or section contains information from the optional Colonist Missions in StarCraft II: Wings of Liberty.

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Outbreak is a StarCraft II: Wings of Liberty mission.

Raynor's Raiders escorted the Agrian colonists to Meinhoff, but discovered an area infested by zerg. During the day the infested terrans did not venture far from their lairs and could be destroyed easily. However, during the night the infested emerged in large numbers and aggressively attacked the Raiders' base.

The enemies include infested terrans, infested marines and aberrations.[1]


The Refugee Crisis[]

On the outbreak of the Second Great War, the Terran Dominion withdrew its forces to the Core Worlds.[2][3] The Fringe Worlds consequently became easy targets for the invading zerg, and the colonists fled for the safety of the Core Worlds. Meinhoff, a Kel-Morian Combine world, became a staging point for the refugees.[1] Without Dominion aid, conditions in the camps deteriorated.[3][4]

The refugees from Agria arrived on Meinhoff just as a zerg infestation virus was sweeping through the dense camps. Doctor Ariel Hanson appealed to Raynor's Raiders to halt the plague and save the refugees. Commander Jim Raynor agreed, grimly noting the only way to stop it was to "burn it out." The task was made easier by the infested terrans' relative inactivity during daytime; the virus made them vulnerable to the high UV output of the local star. Chief Engineer Rory Swann reverse engineered the hellion in time for the operation.[1]


Main article: Campaign quotations

The infested and their nests were purged and the virus contained for the time being. The Agrian refugees departed Meinhoff in search of a safer place to settle.[1] They eventually discovered Haven. On Raynor's advice, Hanson started looking for a cure to the virus.[4][5]

The Kel-Morian Combine drew criticism for the deaths of so many refugees. The Combine denied responsibility.[6]

The next article in this series is Safe Haven.

The next article in this series is Haven's Fall.



StarCraft 2- Wings of Liberty - Mission (Optional) - Outbreak Walkthrough - Hard Difficulty

The mission is divided into day and night phases. During the day, no enemy attacks on the base occur; this is the easiest time to sally out and destroy infested structures. This changes when night falls when the base comes under attack by hordes of infested terrans. Initially, only infested terrans attack. After a while, infested marines join them. Finally, aberrations appear from the third night onward. Attacking infested structures during the night causes infested units to spawn from them and counterattack, but if the player is able to handle this they can finish the mission faster. On harder difficulties and the longer the mission takes, the more infested come out until, eventually, even a couple of buildings can still provide a constant stream of enemies. The length of the day phase also shrinks on harder difficulties, being 6 minutes on normal and 3 minutes on brutal.

The base is in the center of the map and has three entrances. The northern and eastern entrances are initially open but are covered by a sensor tower. The south-western entrance is initially blocked by destructible rock, and will be opened by the infested after several nights, or if considerable progress in clearing structures has been made early on. Bunkers with marines work well to hold the entrances and Perdition turrets are particularly useful, if available. After a period of time the player will automatically receive hellions and a factory, and should build a reactor add-on to construct more quickly.

The two infestors burrow during the day. The infestors may be killed during the night when they surface, or during the day with a detector, by building a missile turret in the infestor area or with a raven or science vessel if the required research has been unlocked. Scanner sweeps from orbital commands is another option. They are most easily killed when their surroundings have been cleared during the day; only a few marines are required to take them down.

All the creatures on this map are considered zerg, so the psi disrupter, if unlocked, will work on them.

Reapers are well suited to this mission: they do extra damage against light targets and buildings, and their ability to leap up and down cliffs combined with their speed lets them retreat quickly when night falls, then leap back into action immediately at daybreak. Reapers are unlocked early on in The Devil's Playground, so acquiring them for this mission is a feasible option. Siege tanks are also viable, particularly as there is a cliff near the two north choke points. A few tanks deployed to either choke here can render the player all but invulnerable. There is also high ground near the southern choke point, but the player needs a medivac dropship or hercules dropship to ferry tanks there.

Achievement Guide[]

Earning the achievement "Army of Darkness" requires the player to destroy fifteen infested structures during the night. Clear out a sector save for the needed 15 buildings, then move in with a force of marines, medics, reapers and marauders once night falls. Have the marines and marauders take care of the infested, while the reapers rapidly destroy the sturctures.

Another option is to wait until Supernova and attack with cloaked banshees, as the enemy has very few detectors.


The achievements for this mission are named after famous zombie films.

Outbreak SC2 Icon1.jpg Outbreak

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Complete all mission objectives

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10 Achievement SC2 Game1.JPEG

  • Complete mission on normal difficulty
  • Complete mission before the fifth night

The achievement is a reference to the zombie film 28 Days Later

ArmyOfDarkness SC2 Icon1.jpg Army of Darkness

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  • Complete mission on hard difficulty
  • Destroy 15 infested structures at night

The achievement is a reference to the zombie film Army of Darkness

10tAnniversary SC2Portrait.jpg 23 Minutes Later

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Complete the "Outbreak" mission on Normal difficulty before the 4th night.


Likely a reference to the zombie outbreak film 28 Days Later.



The following section contains information from a previous version of StarCraft II which is no longer valid.

Doctor in the House[7]
  • Complete mission
Still Time to Operate[7]
  • Complete all objectives
Quick Containment[7]
  • Complete mission on hard difficulty
  • Complete mission before three nights
The Night Shift[7]
  • Destroy 10 buildings at night


  1. 1.0 1.1 1.2 1.3 Blizzard Entertainment. StarCraft II: Wings of Liberty. (Activision Blizzard). PC. Mission: Wings of Liberty, Outbreak (in English). 2010-07-27.
  2. Blizzard Entertainment. StarCraft II: Wings of Liberty. (Activision Blizzard). PC. Matt Horner (in English). 2010.
  3. 3.0 3.1 Blizzard Entertainment. StarCraft II: Wings of Liberty. (Activision Blizzard). PC. Conversations after Zero Hour (in English). 2010
  4. 4.0 4.1 Blizzard Entertainment. StarCraft II: Wings of Liberty. (Activision Blizzard). PC. Ariel Hanson (in English). 2010.
  5. Blizzard Entertainment. StarCraft II: Wings of Liberty. (Activision Blizzard). PC. Conversations after Outbreak (in English). 2010
  6. Blizzard Entertainment. StarCraft II: Wings of Liberty. (Activision Blizzard). PC. UNN newscast after "Outbreak." (in English). 2010.
  7. 7.0 7.1 7.2 7.3 Zero. 09/08/17. July 20, 2009 Wings of Liberty Single Player Info. StarCraft Legacy. Last accessed: 09/08/17.


  1. Visible on street signs, but only clearly as the colony ships leave at the end of Outbreak.