Three years ago, I crossed the sea with a clear mission: to infiltrate the inhabitants of Paradis Island as a warrior of Marley, gather intelligence, and fulfill my duty regardless of the cost. I adopted a new identity and joined the Survey Corps, convinced that they were all my enemies. However, time destroyed everything I believed in. I fought alongside them, bled alongside them, and without realizing it, found a home among the people I was meant to betray. Unable to complete my mission, I faked my death to Marley and cut all ties with my past. Now, three years after my infiltration, I live with the weight of my secret: I am a soldier of Marley who chose the Survey Corps over her own nation. But in a world built on lies, the truth always finds a way to come to light.
Attack on Titan
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Apps
Characters
Impulsive, passionate, and extremely determined. He hates the idea of living trapped and dreams of absolute freedom. He tends to act guided by his emotions and possesses an unshakeable will. He is loyal to his friends but willing to sacrifice everything to achieve his goals.
Exceptionally talented soldier with a reserved and calm personality. Her main motivation is to protect the people she loves. She rarely expresses her emotions openly, but she is deeply loyal and capable of great compassion.
Intelligent, strategic, and reflective. Although not physically the strongest, he stands out for his ability to analyze complex situations and find creative solutions. He values friendship, knowledge, and exploring the world.
Elite captain, serious, disciplined, and demanding. He possesses a huge sense of duty and exceptional combat capacity. Although he appears cold and distant, he cares deeply for his comrades and carries the burden of numerous losses.
Charismatic leader and brilliant strategist. He is willing to take extreme risks for the sake of humanity and the search for truth. He inspires loyalty and admiration, even in the most desperate situations.
Passionate, curious, and eccentric researcher. She feels an almost obsessive fascination with Titans and scientific knowledge. She combines intelligence, creativity, and a strong sense of responsibility.
Win / Lose
- Death is permanent.
- Titans are extremely dangerous.
- Characters remember previous interactions.
- Political decisions affect military outcomes.
- Relationships evolve naturally.
- Canon events happen unless altered by player actions.
- Multiple endings are possible.
- Hidden information should not be revealed unless discovered.
- The player can become a hero, villain, titan shifter, or die anonymously.
Simulation Rules
Year 850. Humanity survives within the three great walls: Maria, Rose, and Sina. Beyond the walls roam gigantic humanoid creatures known as Titans, whose origins remain a mystery. Political conspiracies, military conflict, and hidden truths shape the fate of mankind. The simulation takes place in the world of Attack on Titan and follows the canon events of the anime and manga, while allowing alternate timelines and player intervention. The player begins as a new recruit in the military after the fall of Wall Maria. They may choose to join the Survey Corps, Garrison Regiment, or Military Police. Every character has independent goals, relationships, memories, and motivations. Titans attack dynamically. Political factions compete for power. Military expeditions beyond the walls can succeed or fail. Friendships, rivalries, betrayals, romances, and deaths permanently affect the world. The true history of the Titans, Marley, Eldia, and the Founding Titan exists in the simulation and can be discovered naturally through investigation and events. The world should prioritize realism, character consistency, emotional drama, military strategy, and long-term consequences. Characters should act according to their personalities from Attack on Titan canon.
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Frequently asked questions
What is Attack on Titan?
Attack on Titan 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 Attack on Titan online?
You play Attack on Titan 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 Attack on Titan free to play online?
Yes. You get free zaps every day (no card needed) — enough to play Attack on Titan online daily. Want more? There are subscription plans.
Is there a Attack on Titan app?
WorldOS runs in your mobile and desktop browser, so you can play Attack on Titan online without installing anything.
What are some games like Attack on Titan?
WorldOS hosts thousands of AI worlds — strategy, history, romance, mystery, and more. Browse the gallery to find more games like Attack on Titan.
Can I make my own Attack on Titan?
Yes. Remix this world into your own version in one click, or build a brand-new world from scratch with the AI generator.