Overview
Your mission is to defend your homeland from waves of invading kaiju alongside Orca, humanity’s only ally, using modern weapons such as battleships and naval artillery.
Travel between the sea, where defensive battles unfold, and the ocean depths, where you recover resources. Prepare yourself for the battle against the powerful Kaiju Girls waiting at the end of each stage.
Defend Against Hordes of Kaiju in the “Surface Phase”
Orca is equipped with naval artillery on the hairpin-shaped deck mounted on her head.
Adjust your firing angle by moving her head up and down, take aim, and bombard the approaching kaiju from afar.
The kaiju attack in overwhelming numbers. Rely on Orca’s naval guns and skills, along with support from battleships and your homeland, to hold back the threat.
Recover Resources and Upgrade in the “Underwater Phase”
After successfully defending the surface, the battle shifts beneath the waves.
Control a submarine and collect materials from the remains of defeated kaiju. With a limited amount of time, how efficiently you recover materials and strengthen your forces will determine the outcome of the next Surface Phase.
Giant Girl vs. Giant Girl Naval Battles
At the end of each stage, a powerful Kaiju Girl with a variety of devastating attacks awaits you.
Use the strength you have accumulated and your skill at adjusting firing angles to take aim and claim victory.
Capture Kaiju Girls and Expand Your Military!
Defeated Kaiju Girls are captured and brought back to your base, where they undergo thorough investigation.
Use the information and materials obtained from them to permanently upgrade your military forces and research new ways to protect humanity from the kaiju threat.
Story
Several decades ago, enormous creatures known as “Kaiju” suddenly descended from outer space.
Their overwhelming numbers rendered modern weapons powerless, and humanity began its march toward extinction.
Then, a new species of kaiju was discovered. During an expedition to engage it, naval navigator Iruka Amano made a strange report:
"I can understand what this creature is thinking."
The military began attempting to communicate with the creature through Iruka while investigating its biology.
They discovered that the creature was actually a mammal, just like humans. It was therefore classified not as a kaiju, but as a sea beast, and given the name Orca, the Giant Sea Beast Girl.
Orca possessed enough firepower to drive back the kaiju. Together with Iruka, she takes up the fight for the survival of humanity.
