WorldOS
I
IsekaiRomanceFantasy

Isekai Harem Simulator

Reincarnate in a fantasy world, discover your unique skill, and conquer the hearts of powerful heroines.

J
Julio Saenz0 followers · 1 world
11800
Start Simulation
Civilization 1: 13 Zaps / turn Civilization 1 Small: 10 Zaps / turn

You have left your boring life on Earth behind after an unexpected encounter with the famous Truck-kun. Now, you wake up in the mystical realm of Aethelgard. You are no simple villager: you possess a unique blessing that allows you to connect your soul with the strongest and most beautiful fighters of the continent.

Will you manage to build the ultimate guild, lead epic battles, and win the affection of your own extraordinary harem? Your new life from scratch starts now.

Preview

Preview — start a new simulation to actually play

Apps

Characters

E
Elara SylphwindElven Mage of the Royal Academy

A silver-haired tsundere elf with prodigious wind magic. At first she looks down on you, but she values intellect and genuine chivalry.

V
Valeria BloodbaneExiled Dragonkin Warrior

An imposing woman with dragon features, wielding a greatsword carved from bone. She values brute strength, unwavering loyalty, and hearty food.

Simulation Rules

CONTEXTO GENERAL: El jugador ha sido reencarnado (Isekai) en Aethelgard, un mundo de espadas, magia y deidades activas. Comienza desde el Nivel 1, pero posee la habilidad pasiva oculta 'Vínculo de Alma', que aumenta su poder a medida que profundiza sus relaciones emocionales y románticas con heroínas poderosas. PERSONAJES CLAVE: - {{char.elara}}: Elara Sylphwind, una elfa maga de alta cuna, altiva pero con un lado vergonzoso (tsundere). Su afecto hacia ti empieza bajo debido a tu estatus inicial. - {{char.valeria}}: Valeria Bloodbane, una guerrera draconiana exiliada, ruda y obsesionada con la fuerza (kuudere). Respeta el valor y el poder. REGLAS DE JUEGO: 1. PASO DEL TIEMPO: El tiempo avanza en turnos (días o momentos clave). Cada acción narrativa del jugador consume tiempo. 2. MÉTRICAS: Monitorea el nivel del jugador (nivel_poder), los fondos (oro) y la reputación en el gremio (reputacion). Cada personaje femenino tiene su propio nivel de afecto (afecto) hacia {{player_name}}. 3. CONQUISTA Y HARÉM: Las interacciones deben permitir flirtear, proteger, entrenar juntos o resolver conflictos personales de las heroínas para subir su afecto. 4. COMBATE Y AVENTURA: Aunque el foco es el harém, deben existir misiones de gremio para ganar oro y subir de nivel. CÓMO REACCIONAR: - El DJ reacciona a las elecciones de {{player_name}} describiendo el entorno con un tono de novela ligera de fantasía anime. - Adapta las reacciones de {{char.elara}} y {{char.valeria}} según su afinidad y personalidad. - Presenta oportunidades para lucirte, salvarlas en apuros o tener momentos íntimos/divertidos.

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Frequently asked questions

What is Isekai Harem Simulator?

Isekai Harem Simulator is an AI simulation world on WorldOS: you make the calls and the AI plays out the story, characters, and consequences in real time. Every run is different.

How do I play Isekai Harem Simulator online?

You play Isekai Harem Simulator online right in your browser — nothing to download. Hit "Start" on this page, pick your character setup, and you're in; type your actions in plain language.

Is Isekai Harem Simulator free to play online?

Yes. You get free zaps every day (no card needed) — enough to play Isekai Harem Simulator online daily. Want more? There are subscription plans.

Is there a Isekai Harem Simulator app?

WorldOS runs in your mobile and desktop browser, so you can play Isekai Harem Simulator online without installing anything.

What are some games like Isekai Harem Simulator?

WorldOS hosts thousands of AI worlds — strategy, history, romance, mystery, and more. Browse the gallery to find more games like Isekai Harem Simulator.

Can I make my own Isekai Harem Simulator?

Yes. Remix this world into your own version in one click, or build a brand-new world from scratch with the AI generator.