"Ready to roll out!"

- Terran siege tank(src)

Template:SC1UnitBox The siege tank is a Terran vehicle that can be configured to fulfill both the armored support and the long-range artillery support roles.[1]


The dual-mode siege tank concept was a response to the Guild Wars and the Goliath. Prior to the war, work had progressed on a static "final defense" cannon. However the war demonstrated the need for mobility and as a result an effort was made to make the cannon more mobile. The solution was creative. An existing tank design was modified so that it could operate as a conventional tank in addition to being able to deploy the cannon and become a static artillery emplacement at will.[1]

Siege tanks function in two modes. First is the "tank" or "assault mode" whereas the vehicle may be used in the familiar armored support role using relative light weapons. The second is the more radical "siege mode" whereas the vehicle becomes a static emplacement able to deploy a much more powerful and longer ranged weapon.[1]


AAV-5 Arclite

File:Siege Tank SC-G Art1.jpg

The AAV-5[2] was in service by the late 2490s, renowned throughout the Confederacy for its heavy firepower and stalwart emplacement/advance tactics.[1] It had a crew of three: gunner, driver, and commander/navigator,[2] though could still be crewed by a single operator.[3][4] In addition, the Arclite version could serve as an APC of sorts, carrying personnel into a hot zone and deploying them via side/rear hatches.[3]

The Arclite made navigation easy via its interior viewscreen, although a top hatch still existed should a crew member wish to survey the area personally and/or signal fellow soldiers.[3] The tank also provided a targeting computer, which not only keyed in on heat sources, but also identified their range, notably whether they were in range or not.[3]

SiegeTank SC-G Art2

Schematics of the upgraded AAV-5

Arclite armament consisted of twin 80mm PPG-7 plasma cannons[5] when mobile and the 120mm Shock Cannon when in siege mode.[1] Later on this was upgraded to the 120mm Mjolnir Artillery Cannon, which fired plasma shells in contrast to the standard explosives of the Shock Cannon.[5].

Experience found the AAV-5's protection and "assault mode" armament to be inadequate. This inhibited its ability to advance and establish a "siege mode" fire base. Furthermore, once in "siege mode" it became difficult to repel a close-assault by any enemy forces taking advantage of the "deadzone" formed by its artillery cannon, and even in the AAV-5 transform back into "tank mode", it was relatively undergunned and lightly armored. As such, it has been replaced by the Crucio variant, which has a more powerful "tank mode".[6]



The Crucio was designed to correct the perceived deficiencies of the AAV-5 and entered Dominion service as the AAV-5's replacement following the Brood War. The new turret layout features an upgraded assault-mode armament package so that the Crucio can fend for itself more successfully in an open battlefield. Force deployment costs for the Crucio have increased over the older Arclite, but the increased versatility of the powerful new siege tank more than compensates for the additional expense. The Crucio features twin 90mm cannons and has retained the 120mm Shock Cannon.[6]

The Crucio is equipped with a plasma gun.[7]

Game Unit


SC1 Siege Tank

The siege tank in StarCraft I

In tank mode the siege tank is decent against "Large" ground units. Arguably, it's still not as efficient as a group of marines, especially if a force is being moved by dropship (which can carry 2 tanks or 8 marines).

With siege mode the siege tank comes into its own. The longest range in StarCraft and high damage make it eminently useful for defense (supporting bunkers) or offense (using two groups of tanks to leapfrog forward). The temporary loss of mobility is a small matter. The shock cannon has longer range than the tank's own sight range, so using another unit as a spotter gets the most out of siege mode.

The Shock Cannon causes splash damage to all units and has a minimum range. Therefore tanks in siege mode need other units to guard it (perhaps even other tanks in siege mode), although these guards might take damage from the shock cannon as well as the enemy. The guards can also screen for the tanks as they withdraw. Transforming between modes takes time, during which the tank is unable to move or attack. Air units can also spell disaster for Siege Tanks since the later only has a ground attack.

Some players prefer to "wall-in" their siege tanks, by erecting buildings to surround the tank, thereby preventing the enemy from getting closer than the minimum range of the shock cannon.


SC1 SiegeTank Game SiegeMode

Siege tank in Siege Mode.

InterSiegeMode Terran SC1
Siege Mode

Allows siege tank to transform into siege mode.

This greatly increases the damage and range of the siege tank's attacks, and gives them splash damage, but prevents the tank from moving. In siege mode, the siege tank has a minimum range it cannot attack within.

Purchased from Machine shop
Hotkey S
Cost 150 Minerals Terran SC1 150 Gas Terran SC1 80Time SC2 Game1


  • +1 bonus to goliath ground attack per level
  • +4 to goliath air attack per level (+2 per missile)
  • +2 to vulture attack per level
  • +3 to siege tank tank mode attack per level
  • +5 for siege tank siege mode attack per level
Purchased from Armory
Hotkey W
Level 1Level 1
Cost 100 Minerals Terran SC1 100 Gas Terran SC1 266Time SC2 Game1
Level 2
Cost 175 Minerals Terran SC1 175 Gas Terran SC1 298Time SC2 Game1
Required Science facility
Level 3
Cost 250 Minerals Terran SC1 250 Gas Terran SC1 330Time SC2 Game1
Required Science facility
Purchased from Armory
Hotkey P
Level 1
Cost 100 Minerals Terran SC1 100 Gas Terran SC1 266Time SC2 Game1
Level 2
Cost 175 Minerals Terran SC1 175 Gas Terran SC1 298Time SC2 Game1
Required Science facility
Level 3
Cost 250 Minerals Terran SC1 250 Gas Terran SC1 330Time SC2 Game1
Required Science facility


See: StarCraft I Siege Tank Quotations

The siege tank has many stereotypical, military quotes. The driver of the tank is seen as a large man in body armor who speaks in army lingo. Several of his quotes are obviously taken from the classic Vietnam War films Full Metal Jacket and Apocalypse Now.

StarCraft: Ghost

SiegeTank SC-G Game1

Plasma rounds being fired (SC:Ghost)

StarCraft Ghost Logo2

This article or section contains information about StarCraft: Ghost, which has been declared non-canon. Elements may be taken as 'flavor lore' however.
The content may be significantly out of date. Please do not add speculation to this article, and remember to cite a published source for details.

In StarCraft: Ghost, Nova was able to call down artillery support from siege tanks by identifying targets.[8] siege tanks were player drivable in multiplayer, and were able to run over and crush other players and vehicles.[5]

StarCraft II

StarCraft2 SC2 Logo1

This article or section contains information about a StarCraft II unit or structure.

The content may be significantly out of date as StarCraft II experiences a new build weekly and may change substantially as more information becomes available. Please do not add speculation to this article, and remember to cite a published source for details. This template acts as a reference for StarCraft II beta and the Galaxy Map Editor.


SiegeTank SC2 Rend2

The siege tank in Siege Mode

The siege tank in StarCraft II represents the Crucio type.[6]

The siege tank continues to function as it did in previous games with the dual tank and artillery modes, except it doesn't require as much support as is needed in the original StarCraft. The tank cannot fire when moving, leaving the tank vulnerable to attacks by melee units.[9]

Siege Mode

In Siege Mode, the siege tank has a very long range (slightly longer than the older version) and deals splash damage.[10]


Building an army of both siege tanks and Thors is possible, but expensive. The combination is difficult to stop.[11]

Known Siege Tanks

Known Siege Tank Models

Known Siege Tank Commanders and Crewmen


  • The Mjolnir cannon is a reference to the hammer of the Norse god of thunder, Thor.
  • Crucio is a Latin word which means "I torture."


External Links/References

  1. 1.0 1.1 1.2 1.3 1.4 Underwood, Peter, Bill Roper, Chris Metzen and Jeffrey Vaughn. StarCraft (Manual). Irvine, Calif.: Blizzard Entertainment, 1998.
  2. 2.0 2.1 Arclite Siege Tank. StarCraft Compendium. Accessed on 2008-01-09
  3. 3.0 3.1 3.2 3.3 Neilson, Micky. StarCraft: Uprising. New York and Toronto, Ontario: Pocket Books, December 2000. ISBN 0-7434-1898-0 (eBook only).
  4. Knaak, Richard A. and Naohiro Washio. "Thundergod." In StarCraft: Frontline: Volume 1, pp. 48–93. Tokyopop, August 1, 2008. ISBN 1427-80721-3.
  5. 5.0 5.1 5.2 Source: BlizzCon 2005 StarCraft: Ghost information. Terran Vehicles. Artist: Blizzard Entertainment. Accessed 2007-09-08.
  6. 6.0 6.1 6.2 Crucio Siege Tank. Blizzard Entertainment. Accessed 2008-01-08.
  7. 2008-06-29. Samwise Didier, Dave Bergain. WWI 08 Coverage - StarCraft II Art Panel. StarCraft Legacy. Accessed 2008-06-29.
  8. Goldstein, Hilary. 2003-03-31. Starcraft: Ghost Details. IGN. Accessed 2007-09-01.
  9. Karune. 2007-10-10. Karune: Tanks, Shoot While Moving? StarCraft II General Discussion forum. Accessed 2007-10-10.
  10. Cite error: Invalid <ref> tag; no text was provided for refs named Turtle
  11. Getting an army of both is quite expensive- though if you can build the momentum, it is quite difficult to stop this ranged combination. Karune. 2008-05-22. Is terran turtling going to be as powerful. StarCraft II General Discussion Forum. Accessed 2008-05-22.

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