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Giga Fortresses are among the most powerful weapons the Empire ever developed.
- Imperial Advisor, detailing the Giga Fortress
RA3U Giga Fortress Air Mode Icons
RA3U Giga Fortress Naval Mode Icons

The disturbingly strange Giga Fortress is a massive, aerial-naval war machine capable of adapting to any threat. Based on the Empire's notable VX technology, the Giga Fortress is capable of transforming between a heavily armed Sea Fortress mode and a devastating long-ranged Air Fortress mode.


Assessing viable targets.
- Giga Fortress in combat

As the Empire of the Rising Sun's ambitious plans of dominating the Western hemisphere started to crumble, the nation's leading weapons manufacturers scrambled to come up with contingency plans that would appeal to their shareholders. Thus did the imminent defeat of the Empire directly bring about the merger of two of the top Imperial corporations, Tenzai Robotics and Shirada Shipworks (now reformed under the banner of Ten-Shi Zaibatsu). Desperate times caused these former competitors to set aside their differences and execute a long-dormant proposal made possible only by a harmonious union and their respective expertise. The result is a machine that even the Empire of the Rising Sun's best scientific and military minds previously thought impossible. No, the Giga-Fortress cannot bring back to life the Empire of the Rising Sun's late Emperor Yoshiro. However, this semi-sentient computer-controlled weapons platform is programmed to exact terrible revenge on the Empire's now-numerous enemies - even if the day comes when no Imperial men or women are left to continue the fight.

The idea of a weapon that can continue fighting self-reliantly even without human operators is suggestive of the depths of desperation the Empire's fiercest loyalists fell to. Nevertheless, the Giga-Fortress apparently is real, judging by a growing number of independently-verified accounts coming from Imperial defectors, Soviet prisoners of war, and Allied servicemen. Assuming these accounts can be taken at face value, the Giga-Fortress must be far and away the most expensive and largest fighting craft ever developed by the Empire of the Rising Sun (or any nation, for that matter). Even an Allied Aircraft Carrier or a Soviet Kirov Airship would be dwarfed by the sheer size of this thing, yet almost none of the innards of the Giga-Fortress are crew-quarters. Instead, the Giga-Fortress is said to be lined with an untold number of servers, communications arrays, and self-diagnostic systems, many of which are purposely redundant. A bridge, adjacent bunks, and mess hall were the only quarters built for a human crew, and even these amenities were mostly for formality's sake. No expense was spared in the production of this craft. Instead the Giga-Fortress must have been built under the nihilistic assumption that no crew would be available to steer the thing along its deadly course.


The Giga Fortress is any ground unit's worst nightmare.

Originally thought to be two completely separate platforms, the Giga-Fortress is now believed to be a single entity capable of assuming two completely different forms: a massive sea-fortress, bristling with more than half a dozen heavy-duty cannons and multiple independently-tracking missile systems; and a sky-fortress, built to resemble a monstrous face, armed with a devistating arsenal called the "God's Breath device" located in the "mouth" of the Giga Fortress. The shotgun wedding of Tenzai Robotics and Shirada Shipworks made all this possible, in what may one day considered be among the most outlandish acts of the post-war Empire. As well, it may be remembered as the pinnacle of military robotics. Shirada's advanced weapons, composite armor, and floating fortress nautical locomotors were seamlessly merged with Tenzai's most sophisticated artificial intelligence (A.I.) and dual-stage variable form systems in the construction of this weapon. Those directly responsible are anonymous, likely deceased; some Allied officials have even speculated that the computer-driven Giga-Fortress is the cynical by-product of war criminals refusing accountability for their actions.

Thankfully, as yet there are no publicly documented incidents of a Giga-Fortress attack, and this may be why the machine has no known weaknesses. It is believed to have no moral inhibitions, either, at least not by those who accept that the Giga-Fortress is self-aware to whatever extent is possible for a computer-controlled machine. Its "personality", according to this camp, has been programmed with a version of Imperial military doctrine that places the success of the mission, the ultimate victory of the Empire, and the total defeat of its enemies as top priorities, in that order. But unlike a zealous Imperial warrior, the Giga-Fortress A.I. has no concept of morale, no ability to second-guess officers or to misinterpret its directives, and no need for rest. It exists, perhaps, in a childlike or even a primal state only to fight until either it ceases to operate or the millions of individuals it "thinks" are enemies have been eliminated. One can only hope that the Allies quickly disarm however many of these things finished production.

Deployment History


The Giga-Fortress was deployed by Tatsu in an attempt to destroy the Allies occupying Japan, and one was operational near his headquarters, with others being constructed soon thereafter. They were all destroyed, however.

RedAlert3RisingSun avatar The following is based on the Imperial campaign of Red Alert 3: Uprising and has not been confirmed by canon sources.
Eaaah?! That "thing" is bigger than the Kirov!!
- Soviet Soldier in Vladivostok

In the Imperial campaign, 3 Giga-Fortresses were sent from Tatsu into the battlefield to aid the commander to destroy Vladivostok against the bases of Oleg Vodnik and Nikolai Moskvin, as may well as to eliminate Giles' Allied base.

Giga-Fortresses were deployed to protect Shinji Shimada in the Shiro Sanitarium, but were all brought down by Yuriko Omega.


RA3U Air Transform Icons
Sky Fortress Mode The Giga Fortress attacks enemy with its God's Breath device.
RA3U Naval Transform Icons
Sea Fortress Mode The Giga Fortress attacks enemy with its Shirada 350 mm cannon and anti aircraft missiles.

Notes from the field

What is our objective?
- Giga Fortress, awaiting orders
RA3 GigaFortress2

Giga Fortress in its water configuration.

Battlefield reconnaissance has revealed at least these facts about the Giga-Fortress:

Variable transformation -- Much like several of the Empire of the Rising Sun's much smaller pilot-assisted robots, the Giga-Fortress has two completely different forms. As the sea-fortress, it is capable of defeating entire enemy armadas, shelling coastlines, or assaulting flight groups. As the sky-fortress, it can supposedly devastate anything on the ground with some sort of a powerful weapon called the God's Breath Device. Anything underneath the sky fortress would be crushed, were the sky fortress to revert back to its naval form overhead.

Truly massive -- The Giga-Fortress dwarfs all other modern combat vehicles, including the biggest naval vessels in the Allied or Soviet armadas. Therefore it is thought to be slow and almost impervious. The thousands of redundant systems inside the vessel are said to be constantly maintaining and repairing themselves.

Cost-prohibitive -- Nearly-limitless research budgets spiraled deep into the red during the development of the Giga-Fortress. According to resource estimates, there is almost no way that more than a handful of these behemoths could have been constructed.

Nanocore-made -- The Giga-Fortress is far too big to be built out of the Imperial Docks facility typically used for constructing Imperial warships. Instead, it is built from the very same types of Nanocore machines that unfurl into Imperial structures, forming a Giga-Fortress in the water. Hypothetically, the destruction of such a Nanocore would preventatively cause the destruction of the Giga-Fortress itself.




Massive energy fluctuations detected. Intel reports that Tatsu has activated a new weapon called the Giga Fortress. So be on your guard, Commander.
- Allied advisor

The Giga Fortress is extremely powerful and durable in both modes. In its Sea Fortress mode, it serves a role similar to tier three heavy bombardment ships. Unlike said ships, however, its VX missiles allow it to defend itself against enemy aircraft, as well as enemy vessels that managed to close in.

In its Sky Fortress mode, its attacks inflict far more damage, and it hits targets in a line, allowing it to hit many units and structures that are clustered together. Its God's Breath device greatly out-ranges any anti-air defenses, allowing it to destroy them from afar, though there is a notable delay before the sweeping energy beam makes contact. However, this is also its more vulnerable mode, since the God's Breath device is its only weapon in this mode, rendering it completely defenseless against air superiority fighters. Its slow movement and turning speed in this mode is also a deadly weakness, since it can be easily swarmed by anti-air infantry and vehicles, which can safely attack it from behind or below it. This is especially dangerous if there is no nearby water, which prevents it from transforming into Sea Fortress mode.

Due to their massive cost, losing even a single Giga Fortress is a major setback, so they must always be escorted by other units. In addition, despite being the most expensive unit in the entire game, the Giga-Fortress Core is just as fragile as any other Nanocores, so they should be unfurled as soon as possible, since enemies could easily destroy them while they are still in Nanocore form.



  • 8 Powerful Shirada cannons, which fire faster and more accurately than those of Shogun Battleships
  • To counter slow movement, the Nanocore can be moved into desired location before deployment
  • Very durable
  • Self-repair systems
  • God's Breath device extremely powerful, outranges AA defenses
  • Can crush units underneath by landing on them when transforming to Sea Fortress.
  • Immune to the Magnetic Satellite.
  • Can be upgraded with "Fortified Fleet" and "Advanced Rocket Pods"
  • Missiles can attack land and air units
  • Cannot be flanked in Sea Fortress mode
  • Cannot be Pilot-Sniped by Natasha
  • Able to escape from enemies with transformation ability
  • Does Splash damage with its God's Breath weapon


  • The most expensive unit in the game at 6300 credits
  • Very slow movement (as slow as Kirov Airship in sky-mode) in both forms and can be easily kited and overwhelmed by sheer numbers
  • Vulnerable to Commandos in Sea Fortress mode, Yuriko can drag a Sky Fortress from the sky with ease
  • Its cannons do less damage and have shorter range than that of Shogun Battleships
  • Vulnerable to fighters in Sky Fortress mode, especially when there is no water nearby or when the transformation ability is on cooldown.
  • God's Breath Laser inflicts damage shortly after firing, allowing fast units to outmanuver the damaging energy blasts.
  • Deployed from a nanocore and is fragile before fully deployed. Can only be deployed on water
  • Fast units (Bullfrog, Reaper, Hydrofoil, Mutigunner IFV) can get out of the God's Breath beam line easily
  • Cannot gain veterancy from Veteran Academies
  • Can be bribed by a Spy in Sea Mode.
  • Vulnerable to long-range artillery in Sea Mode
  • Can be shrunk by Cryocopters, weakening it considerably
  • Only two pairs of cannons may fire on a single target at once due to their placement
  • Can be defeated by Kirov Airships or Harbinger Gunships while in sea mode, if left unchecked
  • Terror Drone is a true threat as when infected while in sea mode, fortresses are unable to transform into sky mode
  • A Spy whom is sent into a nanotech mainframe can take down all Giga Fortresses in Sky Mode.
  • Sky Fortresses cannot attack enemies at very close range (blind spot).



  • I am awake.
  • Giga Fortress, alive and ready.
  • Ready for assignment.

Select in Sea Fortress mode

  • Where do you need me?
  • I am listening.
  • Giga Fortress responding.
  • All systems nominal.
  • What is our objective?
  • Awaiting command.

Select in Sky Fortress mode

  • Nice day, isn't it?
  • This is a nice view!
  • Where is... my body?

Moving in Sea mode

  • Command authorized.
  • Moving as ordered.
  • Of course.
  • Approaching destination.
  • Starting travel sequence.
  • Calculating route.
  • Processing request.
  • My thoughts exactly.
  • Heading set.

Moving in Sky mode

  • I agree.
  • Proceeding as directed.
  • Updating coordinates.


  • Eliminating.
  • Removing enemy presence.
  • Engaging now.
  • Target destruction imminent.
  • Anticipating casualties.
  • All weapons on.
  • Enabling fire sequence.
  • Target is designated.

Move to Attack

  • Approaching target.
  • The task is now registered.
  • Preparing for engagement.
  • It will be eliminated.
  • Enemy removal commencing.

In combat

  • Continuing enemy scan.
  • Extermination in progress.
  • Assessing viable targets.
  • Weapons all activated.
  • Territory control is under way.
  • Prioritizing attack sequence.


  • I could use some repair.
  • Yes, I agree.

Under fire

  • Are you aware of them attacking me?
  • Experiencing technical difficulties.
  • Enemy resistance increasing.
  • They are attacking me!
  • Sustaining exterior damage.
  • Hull integrity is at risk.



  • The Giga Fortress concept was recycled from the unused Flying Head Fortress unit concept.
  • If one looks closely at the back of a Giga-Fortress in air mode, the Shirada Cannons can be seen still turning around like in Fortress mode.
  • Since the Giga Fortress is constructed as a Nanocore, it does not benefit from the effects of Veteran Academy.
  • The Giga Fortress is one of the most costly units in the entire Command & Conquer franchise, costing a whopping 6300 credits each, making them even more expensive than the Epic units from Kane's Wrath.
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