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"When the time for an ambush arrives, remember that the Zerg aren't the only ones who can go underground. The Widow Mine packs a nasty surprise, and is ideal for perimeter defense as well as tactical ambushes."

- A Dominion Armed Forces blurb for the widow mine.(src)

WidowMine SC2-HotS Art1

A widow mine

The widow mine is a terran unit introduced in Heart of the Swarm.


"It’s like watching the grandkids of the old spider mines doing the family proud."

- Redell Quinton on widow mines(src)

WidowMine SC-FM Art1

A widow mine

A support unit,[1] the widow mine is a quadrupedal device that represents the next step in Dominion automated weaponry.[2] It is just under half as tall as a terran wearing CMC armor.[3] It is controlled remotely, piloted into a contested area and then set to activate when enemy units draw near. Once triggered, the widow mine launches a missile designed to explode in a firestorm of shrapnel, eliminating its primary target as well as any foes that might be nearby.[2] These sentinel missiles are of short range and pack a fragmentation warhead, that delivers superheated shrapnel to the target and the adjacent area on detonation. The missiles are assembled in an automated manufacturing plant located in the 'thorax' of the unit. After numerous friendly fire incidents, widow mines were outfitted with a powerful friend or foe identification system, which is loosely based on the operative algorithms present in all Crucio smart shells. Initially, the system worked as intended, but it didn't take long for casualty rates to rise once again.

If the widow mine sustains crippling damage to any of its systems, an advanced heuristics recovery algorithm quickly begins the process of determining what's the best course of action to restore operative efficiency. After executing multiple simulated scenarios, the simple onboard AI reroutes power from affected systems and reprograms the unit's behavioral patterns to either allow it to complete its mission, or return home for repairs.[4]

Mira's Mercs modified widow mines to accommodate additional weaponry and explosives, after a long period of destructive explosive experimentation.

Widow mines were common pets among the upper-class households of Tyrador IX, in spite of the occasional gory accident that would make the news as a result.[5]


The widow mine was inspired by zerg burrowers,[4] and constructed around a modified version of the spider mine pioneered by Victor Kachinsky.[2] Field tests revealed that the burrowing capabilities of the weapon could be improved at a nominal cost. The addition of neosteel carbide tips, and sonic oscillators that allow each leg to vibrate independently at high speeds, significantly reduced burrow times. The enhanced claws have seen much use in "Mine Fighting", a popular (and illegal) sport that pits two of these robots against each other for credits and glory.[4] The design of these mines was further improved on by the research and development of Redell Quinton of Project Blackstone.[6]

Widow mines have been used in diverse scenarios—perimeter defense, tactical ambushes, and political assassinations. An apocryphal record even attests to a single widow mine killing a corrupt colonial magistrate and his entourage of like-minded officials by destroying the dining room they were in.[4] Upgrades in drilling technology later allowed the widow mine to reduce its burrow time by two-thirds, with the implementation of neosteel carbide tips and sonic oscillators.[3]

Under the reign of Valerian Mengsk, technicians were perplexed by the occasional misfires of the past, and added more protective plating to the widow mines to better contain accidents and protect against unintended injuries.

Always fond of robotics, Umojan Protectorate engineers held an exclusive competition to craft the perfect widow mine. They were thrilled to discover the winner was still a student finishing her degree. Their widow mine variant was incorporated into their arsenal.[5]

Dominion marines have been known to pit widow mines against each other in friendly scuffles at the barracks. For the sake of balance, its drilling claws upgrade is disabled for these fights, as well as its missile launcher.[3]

Game UnitEdit


Widow mines are a burrowing assault unit in the terran arsenal. While unburrowed they cannot attack, but when burrowed, they can fire a sentinel missile at opponents, dealing splash damage in a massive area. This makes them effective against clumped low health units like mutalisks, or marines. However, the missile takes time to recharge after a use. Its attack only targets units, not structures.

Widow mines are cloaked when initially burrowed, but become decloaked while their missile is on cooldown. With the Burrowing Claws upgrade, the widow mine will always remain cloaked while burrowed.

Upgrades and AbilitiesEdit

DrillingClaws SC2-HotS Icon
Drilling Claws

Reduces the time Activate Mine takes to burrow the widow mine from 3 seconds to 1 second. Cloaks the widow mine when burrowed, even when Sentinel Missile is on cooldown.

Purchased from Tech lab attached to factory
Hotkey C
Cost 75 Minerals Terran SC1 75 Gas Terran SC1 79Time SC2 Game1
Required Armory
SC2 TerrVehArm
Terran Vehicle and Ship Plating

Increases the armor of terran vehicles and spacecraft

Purchased from Armory
Hotkey V
Level 1
Cost 100 Minerals Terran SC1 100 Gas Terran SC1 160Time SC2 Game1
Level 2
Cost 175 Minerals Terran SC1 175 Gas Terran SC1 190Time SC2 Game1
Level 3
Cost 250 Minerals Terran SC1 250 Gas Terran SC1 220Time SC2 Game1
UnstablePayload SC2-HotS Icon
Sentinel Missiles

The widow mine fires a sentinel missile that deals 125 damage (+35 vs. shields) and 40 (+25 vs. shields]) splash damage to units within 1.25 radius, 20 damage inside 1.25 to 1.5, and 10 damage from 1.5 to 1.75. The ability is automatically activated when the widow mine burrows and can only be deactivated when the mine unburrows.

The attack damages any friendlies except itself or other widow mines[7]

Reveals the widow mine when on cooldown.

The ability is autocast.

Range 5
Cooldown 29Time SC2 Game1
ActivateMine SC2-HotS Icon
Activate Mine

The widow mine burrows, activating the Sentinel Missiles ability.

The ability can be autocast.

Duration 2 (0.6 with Drilling Claws)Time SC2 Game1

Co-op MissionsEdit

Widow mines are usable by Mira Han and Matt Horner in Co-op Missions. They can be built from assault galleons, and can be upgraded to send out five explosions upon death.

Abilities and UpgradesEdit

Reduce Sentinel Missile Cooldown by 20 seconds. When Widow Mines are killed, they launch 5 Sentinel Missiles at random nearby targets (within a radius 5.5) that deal 10 (+10 vs. shields) area damage (radius 2.625).

Stronger Death Chance Mastery: When Widow Mines are killed, they launch 10 Sentinel Missiles with a chance 1.5% per mastery point.


Mastery: +1.5% chance per Stronger Death Chance: mastery point. Up to a maximum 45% chance

Purchased from Engineering bay
Hotkey D
Cost 50 Minerals Terran SC1 50 TerranVespene SC2 Game1 60Time SC2 Game1
With Impatience
Cost 50 Minerals Terran SC1 50 TerranVespene SC2 Game1 42Time SC2 Game1
BlackMarketLaunchers Game1
Black Market Launchers

Sentinel missile range is increased by 50%, and can burrow and unburrow much faster.

Campaign Acquisition
Acquired from Reach Han and Horner Level 4
Purchased from Engineering bay
Hotkey R
Cost 100 Minerals Terran SC1 100 TerranVespene SC2 Game1 90Time SC2 Game1
With Impatience
Cost 100 Minerals Terran SC1 100 TerranVespene SC2 Game1 63Time SC2 Game1
Impatience Coop Game1

Mira's Unit Build and Research times are reduced by 30%

Campaign Acquisition
Unlock Reach Han and Horner Level 6
SignifigantOthers Coop Game1
Significant Others

Increases the Horner's units life by 1%.


Horner's units Hit Points
Mastery: +0.01% hit points per Significant Others Bonuses mastery point. Up to a maximum +1.3% hit points

Campaign Acquisition
Unlock Reach Han and Horner Level 15.
Terran Armor

Increases the armor of all terran units.

Campaign Acquisition
Unlock Initially available.
Purchased from Armory
Hotkey V
Level 1
Cost 100 Minerals Terran SC1 100 TerranVespene SC2 Game1 160Time SC2 Game1
Effect Armor: 1
Level 2
Cost 175 Minerals Terran SC1 175 TerranVespene SC2 Game1 190Time SC2 Game1
Effect Armor: 2
Level 3
Cost 250 Minerals Terran SC1 250 TerranVespene SC2 Game1 220Time SC2 Game1
Effect Armor: 3


The widow mine was previously a suicide unit.[8][9]

In patch #8, it lost the ability to autoacquire cloaked units.[10]

For Patch 4.0, widow mines were altered to be observable when reloading their sentinel missile, even if still burrowed. This was done to "reduce certain game ending moments" and make cleaning up unattended widow mines easier, while still allowing the widow mine to perform its splash damage role if properly set up with a terran army or used defensively.[11]




  1. 2014-09-25, The Science Corner –The Threat Continues. Blizzard Entertainment, accessed on 2014-09-27
  2. 2.0 2.1 2.2 Units: Widow Mine, Blizzard Entertainment. Accessed on 2014-05-12
  3. 3.0 3.1 3.2 Barba, Rick. StarCraft Field Manual (hardcover). Insight Editions, November 17, 2015.
  4. 4.0 4.1 4.2 4.3 2014-09-11, Widow Mine Science, Blizzard Entertainment. Accessed on 2014-09-12
  5. 5.0 5.1 Blizzard Entertainment. StarCraft II: Legacy of the Void. Collections Tab: Skins. October 17, 2016
  6. Blizzard Entertainment. Project Blackstone, accessed on 2013-02-06
  7. Nuthouse01. 2014-01-11. SC2 widow test. Youtube. Accessed 2014-01-11.
  8. Blizzard Entertainment, Teamliquid. 2012-06-09. Heart of the Swarm Update. Blizzard Entertainment. Accessed 2012-06-09.
  9. Dayvie. 2012-10-05. Thoughts on Balance Update #5 Heart of the Swarm Beta Discussion. Accessed 2012-10-13.
  10. Kaivax. 2012-12-05. Beta Balance Update #8 – December 5, 2012. Heart of the Swarm Beta Discussion Accessed 2012-12-05.
  11. 2017-08-17, StarCraft II Multiplayer - Major Design Changes. Blizzard Entertainment, accessed on 2017-08-20
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