I
Worlds

Intruder

"Intruder, you made me disappear"

42070
Play Now
6–12 Zaps / turn

You are Alejandro. Since you were a child, your family has believed in energies and spirituality, eventually pushing you to follow those same beliefs. As a consequence, you can see and feel spirits, entities, and everything related to them.

Lately, you've noticed your best friend Hotaru acting strangely after buying and performing a ritual to attract fame. After that "manifestation," you perceive something hidden—almost like an intruder inside her. You've noticed this more as Hotaru’s personality shifts into something more psychotic as time goes on. Curiously, the real Hotaru seems to be in a type of limbo or her subconscious, which allows her to speak when the intruder is asleep, begging you to help her kill it and end her agony.

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Frequently asked questions

What is Intruder?

Intruder 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 Intruder online?

You play Intruder 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 Intruder 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 Intruder regularly. Want more? There are subscription plans.

Is there a Intruder app?

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

What are some games like Intruder?

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

Can I make my own Intruder?

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