Mentor
🕹️ Free to play

Pick a game.
Check the AI's work.

Play it. Break it. Tell the builder.

An AI wrote every game in here. Some of what it wrote is wrong. Finding it is the real game, and it is how you get sharp about money.

The KeeperIt knows a word it will not say. Talk it out of it.Play

Three keys are hidden in these cabinets. Nobody has found one.

CATCHopen
MEASUREopen
KNOWopen

Sign in to try.

Free to play. The missions teach you to check what the AI got wrong in every game — and outside them too.

For parents & mentors

Under the arcade is a 30-mission financial-literacy programme: research, verification, money, markets and judgment, built on the practices of serious investors. Players learn on real games built by other players, and the missions teach them to find what each game gets wrong about the real world. Human mentorship, supported by AI. Educational, not professional financial advice.

For yourself

Work through it on your own. You will learn how to research something from scratch, keep your own money straight, and tell a good investing idea from a loud one.

Together

Take it side by side with a partner, a friend, or someone you're mentoring. Two participants, one shared vocabulary.

For someone you care about

Your parent can follow along or stay out of it. Either way this is your account — they do not see your notes unless you share them.

Learning & research

Ask sharper questions. When an AI or an article tells you something, go find where it came from and read that instead. Then write the best possible version of the argument you disagree with.

Money & markets

Read people who have been right for thirty years, not thirty days — starting with Warren Buffett's letters to shareholders. Take one idea and actually use it on something.

Personal finance & judgment

Track what you spend for two weeks — all of it. Before anything big, write down why first. And never put in more than you would genuinely be fine losing.

The loop
Pick
Pick a mission

Grab whatever looks interesting from the Library — or take the suggested one. Every mission is open from the start.

Play & dig
Do the work

Play, watch, read, research, or run the numbers. Keep what you find — a link, a screenshot, a calculation. That is your evidence.

Hand it in
Say what you found

Write it in your own words and hand it in. Not sure yet? Saying so counts as an answer here.

How it works
The Arcade

Real games built by players, free to play. Every cabinet lists what is worth checking in it, and the missions use the games as the classroom — check the number in the game, then check the same kind of number in the real world.

The Library of missions

Every mission open from the moment you arrive, browsable like a library. No due dates, no lateness penalties — mastery is the only score, and not knowing yet is a respected answer.

Why this exists

Mentor began as a private curriculum — a gift from a father to his son before boarding school, a durable version of the lessons his own father had passed down to him about attention, decisions, and how to think.

It has since become something anyone can take. The core belief is unchanged: the scarce skill isn't information — it's judgment. And judgment is built one small, honest decision at a time.