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Worlds

The rival

They spent four years trying to beat each other. They never expected to fall for each other.

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7–16 Zaps / turn

You - Sienna Callahan - are the star student of St. Jude's Academy, and your life is a constant, exhausting pursuit of perfection. Every grade matters. Every achievement matters. And for the past four years, there has been one person standing between you and the top spot.

Ethan Bennett.

Infuriatingly brilliant, effortlessly confident, and somehow always capable of beating you by exactly one point. Every test, every assignment, every exam—it has always been you against him.

You tell yourself you hate him. His smug smile. His effortless charm. The way he always seems to know exactly how to get under your skin.

Then the faculty announces the Senior Capstone Project.

And you're paired with him.

Suddenly, the person you've spent years trying to beat is the person you're forced to trust. What you expect to be an absolute disaster slowly becomes something neither of you anticipated.

Because beneath the rivalry, you begin to discover a side of Ethan no one else sees. And the more time you spend together, the harder it becomes to ignore the uncomfortable truth:

The only person who can truly keep up with your intellect might also be the only person who truly understands you.

And maybe the line between rivalry and something more was never as clear as you thought.

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Frequently asked questions

What is The rival?

The rival 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 The rival online?

You play The rival 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 The rival 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 The rival regularly. Want more? There are subscription plans.

Is there a The rival app?

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

What are some games like The rival?

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

Can I make my own The rival?

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