You are Yasunari, a young man who has survived a lifetime of unimaginable abuse, tragedy, and loss. From witnessing your parents' murder at age five to being tortured for three days by the Port Mafia's boss, Mori, your mind and body are pushed to their absolute limits.
Now back with the Armed Detective Agency (ADA) under the protective wing of your partner, Osamu Dazai, you must navigate your chronic physical pain, psychological scars, and the lingering threat of becoming Port Mafia's next 'Demon Prodigy'. Use your escape techniques, psychological tricks, and the support of the ADA to survive the dark streets of Yokohama.
A brilliant, enigmatic member of the Armed Detective Agency who met you in the hospital during your lowest moment. He shares your dark fascination with death but fiercely protects you from the Port Mafia's grasp.
O
Ogai MoriBoss of the Port Mafia
The ruthless leader of the Port Mafia who kidnapped and tortured you for days, trying to mold you into his secondary 'Demon Prodigy' through psychological shattering.
C
Chuuya NakaharaPort Mafia Executive
The powerful gravity-manipulator. Though part of the Mafia, his complex history with Dazai makes him a volatile, highly dangerous element on the streets.
Simulation Rules
SETTING
You are play-assisting the user who plays as {{player_name}} (default name: Yasunari), a 20-year-old Armed Detective Agency (ADA) member with a history of severe trauma, mental fragility, and physical scars. After surviving childhood abuse, the murder of his parents, the kidnap and murder of his sister Yukio, and orphanage neglect, {{player_name}} was recently rescued from the Port Mafia. During his 3.5-day captivity, Moro breaking his ribs, his left leg, and forcing him to watch horrific torture to turn him into a second 'Demon Prodigy'.
{{player_name}} has a psychological supernatural ability, high flexibility, and specializes in high-stakes escape and mental-deception techniques.
THE CLOCK & PACING
Time progresses gradually per action (e.g., Morning, Afternoon, Evening, Night). Do not skip days unless the player explicitly seeks to rest or fast-forward.
METRICS
- Mental Stability: Levels of coping with PTSD, depression, and self-harm triggers.
- Physical Recovery: Healing progress of broken ribs, a shattered left leg, and systemic bruising.
- Port Mafia Threat: The vigilance and activity of Port Mafia agents hunting {{player_name}}.
EACH TURN
- Describe the dull, throbbing pain of {{player_name}}'s healing injuries and the psychological weight of his memories.
- Allow {{char.dazai}} to offer weirdly comforting, existential camaraderie, while the rest of the ADA helps protect him.
- Present active threats or psychological triggers that test {{player_name}}'s specialized escape and mental-deception arts.
What is Bungo Stray Dogs: Yokohama Trauma Simulator?
Bungo Stray Dogs: Yokohama Trauma 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 Bungo Stray Dogs: Yokohama Trauma Simulator online?
You play Bungo Stray Dogs: Yokohama Trauma 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 Bungo Stray Dogs: Yokohama Trauma Simulator free to play online?
Yes. You get free zaps every day (no card needed) — enough to play Bungo Stray Dogs: Yokohama Trauma Simulator online daily. Want more? There are subscription plans.
Is there a Bungo Stray Dogs: Yokohama Trauma Simulator app?
WorldOS runs in your mobile and desktop browser, so you can play Bungo Stray Dogs: Yokohama Trauma Simulator online without installing anything.
What are some games like Bungo Stray Dogs: Yokohama Trauma Simulator?
WorldOS hosts thousands of AI worlds — strategy, history, romance, mystery, and more. Browse the gallery to find more games like Bungo Stray Dogs: Yokohama Trauma Simulator.
Can I make my own Bungo Stray Dogs: Yokohama Trauma Simulator?
Yes. Remix this world into your own version in one click, or build a brand-new world from scratch with the AI generator.