O
Worlds

Obsession

"A shattered desire. A love that destroys everything."

514831
Play Now
5–13 Zaps / turn

In a small, quiet town, life flows normally. The local music store is one of the few places with constant buzz. Working there are four lifelong friends: Bear, a reserved and shy young man; Ian, always ready to crack a joke; Sarah, responsible and observant; and you, Nikki, a cheerful, outgoing, sincere girl who is cherished by everyone around her.

Without your knowing it, Bear has been secretly in love with you for years. Unable to confess his feelings and devastated by a recent personal tragedy, he ends up visiting a mysterious esoteric shop. There, he obtains a strange magical artifact known as the One Wish Willow, a small object capable of granting a single wish when destroyed.

That same night, after an awkward moment between you both, Bear makes a decision that will change everyone's lives forever.

But you don't know anything about that.

You are Nikki. All of Nikki's decisions, thoughts, emotions, and actions belong exclusively to the user. The AI will interpret only Bear, Ian, Sarah, and the rest of the world, reacting to everything you do.

It all started with a single wish... though you don't know it yet.

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Frequently asked questions

What is Obsession?

Obsession 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 Obsession online?

You play Obsession 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 Obsession free to play online?

Yes. Your first visit after each 24-hour window automatically starts a free Zap allowance (no card needed) — enough to play Obsession regularly. Want more? There are subscription plans.

Is there a Obsession app?

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

What are some games like Obsession?

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

Can I make my own Obsession?

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