Build a little lab.Chase a big idea.
A relaxed strategy game about AI, discovery, and the campus you make your own.
- Free to play
- Single player
- No download
One email. No password needed.
Your progress saves to your account.
Welcome back.
Use the password you added to your account.
New here, or forgot your password? An email link lets you start or return to your campus.
Check your email.
We sent a sign-in link to . Open it to start or return to your campus.
You can send another link in 60 seconds.
A small step. A new possibility.
Collect resources. Run experiments. Let one discovery lead to the next.
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Turn data and compute into your first experiment. Decide where your campus grows next.
Actual gameplay. Preview only.
A few things
before you begin.
Bring your curiosity. We’ll show you the rest.
Is Lost Valley free to play?
Yes. Play in your browser, with no download or paid upgrades.
Do I need to know anything about AI?
No coding or AI experience is needed. Your first goal guides you through collecting resources and running an experiment. Short field notes explain the ideas as you unlock them.
Can I play a little at a time?
Yes. Make a few decisions, then return when you’re ready. Production and research catch up for up to eight hours while you’re away. Production stops when a building’s buffer fills. You can pause the campus whenever you like.
An internet connection is needed. Wait for “Saved to cloud” before closing the game.
Why do I need an email?
Your email link signs you in and takes you straight to your campus. Later, you can add a password or a passkey using your device unlock.
Your account and progress are stored on Cloudflare. Game saves aren’t kept in your browser; an essential cookie keeps you signed in. Settings lets you export your account data or delete your account and progress. Cloudflare recovery backups expire under its retention policy.
Your first breakthrough
starts here.
One email. A campus of your own.
Start your campus