DecisionPlay

Game theory made easy. A new strategy puzzle every day: spot the game hiding in a real situation, then find the move that changes the outcome.

Game theory made easy. DecisionPlay turns everyday conflicts into strategy puzzles. Every situation, from splitting a dinner bill to a holdout negotiation, hides a game with rules. Name the game, see what each side wants, and find the move that changes the outcome.

PLAY THE DAILY PUZZLE A new situation every day. Guess which game is hiding inside it in three tries, then read the full breakdown. Keep your streak going and share your result without spoilers.

SCENARIOS TO PLAY Dating, family, work, negotiation, history, policy and more. Make the calls, then see how a game theorist reads the same moments.

MAP YOUR OWN SITUATION Describe a real decision in plain words. DecisionPlay names the players, the options and the pressure points, and shows which assumptions drive the result.

LEARN BY PLAYING Prisoner's Dilemma, Chicken, Stag Hunt, signaling and more, explained with plain language and interactive demos. Play bots that each follow one rule and beat them.

NO ACCOUNT NEEDED Everything works without signing in. Your progress stays on your device. Move your streak to a new phone with a short code.

Educational, not advice.