Worlds in English you can play
Books come with a free demo, no account needed. The other worlds open after you sign in.
The Mom Test: How to Talk to Customers and Learn if Your Business is a Good Idea When Everyone is Lying to You
by Rob Fitzpatrick
A practical guide to running customer conversations that surface truth instead of polite lies, so you can validate a business idea before building the wrong thing. In this world you practice spotting empty compliments, anchoring vague claims into specifics, finding the right people to talk to, and steering conversations toward real commitments.
EN146 characters · Play
Traction: How Any Startup Can Achieve Explosive Customer Growth
by Gabriel Weinberg and Justin Mares
This book distills how startups find their first customers and scale growth, covering 19 traction channels and the Bullseye framework for testing and prioritizing them. In this world you practice choosing, testing, and doubling down on the channels that actually move the needle for your business.
EN311 characters · Play
The Subtle Art of Not Giving a F*ck
by Mark Manson
This book argues that a good life comes not from chasing endless positivity but from choosing your struggles and values with care. Through Mark Manson's blunt, story-driven philosophy, you'll practice telling meaningful problems from trivial ones, taking responsibility without blame, and facing failure and mortality as sources of clarity rather than fear.
EN116 characters · Play
Thinking in Systems: A Primer
by Donella H. Meadows
A clear guide to how stocks, flows, and feedback loops shape everything from thermostats to economies. In this world you practice spotting system traps like escalation and eroding goals, and learn to find the leverage points that create lasting change rather than quick fixes.
EN161 characters · Play
Atomic Habits: An Easy & Proven Way to Build Good Habits & Break Bad Ones
by James Clear
This book explains how tiny, consistent changes compound into remarkable results, using the Four Laws of Behavior Change to build good habits and break bad ones. In this world you practice designing your environment, stacking habits, tracking progress, and using identity-based thinking to make lasting change stick.
EN161 characters · Play
Upload the PDF or EPUB and StudyRPG builds a world from it, with every question in English.