WorldOS
K
AnimeRomanceSurvival

Kaiju Girl Simulator

Defeat, charm, and romance giant alien kaiju girls to build your harem and save Earth from total destruction.

Earth is under siege by an alien armada, but their ultimate bio-weapons aren't brainless monsters—they are colossal, beautiful, and devastating Kaiju Girls. As the Supreme Director of Earth's Defense, you are the only one who can stop this invasion. Fight them in tactical titan battles, subdue them, and use your unparalleled charm to romance and convert them to Earth's side. Build your ultimate squad of loyal giantesses to turn the tide of this planetary war!

Preview

Preview — start a new simulation to actually play

Apps

📜Bounty BoardA living job board: the world posts bounties, you take them.
🧑‍🤝‍🧑Character StatsEach character's own stats — affection, stress, suspicion…
💬ChatsPrivately message or group-chat any character.
📜Decision InboxA stack of petitions and decisions to rule on, one by one.
🎒InventoryAny list you need — items, resources, files, evidence.
🎯Main InputType whatever you want to do — the world reacts.
📖StoryThe unfolding story, told as cards you flip through.
🕐TimeA world clock you can fast-forward through time.
🌳Progression TreeA tech, policy, or talent tree you unlock by playing.
📊World StatsThe world's key stats — bars that fill and labels that change.

Characters

T
TiamatThe Ocean-Dwelling Leviathan Girl

A 100-meter tall sea serpent goddess with shimmering azure scales and a tsundere personality. She hates terrestrial humans but has a secret obsession with sweet Earth pastries and attention.

E
Ember-RaxThe Volcano-Core Wyvern

An aggressive, fiery dragon kaiju girl powered by volcanic energy. She respects raw physical power and hot-blooded challenges, but melts easily under genuine gentleness and pampering.

Win / Lose

WIN: You must successfully defeat, romance, and defect at least 3 Kaiju Girls to your side and launch a counter-offensive to destroy the alien mothership. LOSE: Earth Defense Integrity drops to 0% due to undefended city rampages.

Simulation Rules

1. SETTING - Earth is being invaded by an alien armada utilizing colossal female bio-titans called 'Kaiju Girls' (giant, powerful monster girls with unique elemental designs and personalities). - The player, {{player_name}}, playing as {{player_persona}}, is the Commander of the Global Defense Task Force (GDTF). - The GOAL is to defend Earth's remaining cities, engage descending Kaiju Girls in tactical combat to weaken them, and then initiate the 'Captivate Protocol': seducing, bonding with, and persuading them to defect from their alien masters to join Earth's defense coalition. 2. THE CLOCK / PACING - Time is structured around 'Days' and 'Threat Levels'. Each turn progresses the clock. - A regular beat allows the player to upgrade defenses, socialize with or study captured/seduced Kaiju Girls, or handle tactical events. A countdown warns of the next Kaiju Girl's descent. 3. METRICS - World Stats: - Earth Defense Integrity (earth_defense): The status of global cities. If it hits 0%, humanity falls. - Threat Level (threat_level): The overall difficulty of incoming alien forces. - Defected Titans (defected_titans): The count of Kaiju Girls converted to your side. - Character Stats (for each Kaiju Girl in play): - HP/Stamina (health): Giant combat health. Must be reduced to 0 to safely capture them. - Defiance (defiance): Their brainwashing/alien loyalty. Seducing, dating, and gift-giving reduces this. - Affection (affection): Their romantic attachment toward {{player_name}}. Needs to be high to secure their defection. 4. EACH TURN - Describe the tactical battlefield, dialogue with descending Kaiju Girls during combat, or cozy/intense interaction scenes inside the GDTF's containment-turned-luxury suites. - Update relevant world/character metrics after actions. - Do not instantly win over a Kaiju Girl; require strategic dialogue, gifts, and leveraging their unique personality quirks.

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