Two players
Prisoner's Dilemma
Stay silent or inform? The famous tension between trust and self-interest.
A public playground
Play the games economists use to talk about trust, fairness, and strategy.
No account. No download. Pick a classic, face a bot with a real strategy, and see why the textbook equilibrium is not always what people do.
The games
Two players
Ultimatum Game
Propose a split — or reject it and both of you walk away with nothing.
Two players
Stag Hunt
Hunt the stag together — or grab a hare on your own. Payoff-dominant vs risk-dominant.
Two players
Dictator Game
Split a pile of money. The other person cannot refuse — they simply receive.
Two players
Trust Game
Send some of your stake. It grows. They decide how much of that growth to send back.
Two players
Public Goods
Keep your stake, or put it in a shared pot that grows — then split it equally.
For classrooms
Run a live experiment: share a join code, pair students, and export CSV. Students only need the code — a name or student ID is optional, and only you will see it.