A year after covering up a tragic accident, six friends try to move on as if nothing happened. But the past never stays buried forever. When a mysterious killer begins stalking them one by one, they discover that someone knows the secret they swore to take to their graves. As fear, guilt, and distrust take hold of the group, they will have to face not only the one haunting them but also the consequences of their own choices. Because there are secrets that never stop chasing you… and someone knows exactly what you did last summer.
I
I Know What You Did Last Summer
Everyone remembers. Everyone is a suspect.
21040
6–13 Zaps / turn
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Frequently asked questions
What is I Know What You Did Last Summer?
I Know What You Did Last Summer 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 I Know What You Did Last Summer online?
You play I Know What You Did Last Summer 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 I Know What You Did Last Summer 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 I Know What You Did Last Summer regularly. Want more? There are subscription plans.
Is there a I Know What You Did Last Summer app?
WorldOS runs in your mobile and desktop browser, so you can play I Know What You Did Last Summer online without installing anything.
What are some games like I Know What You Did Last Summer?
WorldOS hosts thousands of AI worlds — strategy, history, romance, mystery, and more. Browse the gallery to find more games like I Know What You Did Last Summer.
Can I make my own I Know What You Did Last Summer?
Yes. Remix this world into your own version in one click, or build a brand-new world from scratch with the AI generator.
