Library
Reflection tests
Ten to twelve questions, a percent score, and a note on how to read it. The library stays open without an account.
Prisoner's Dilemma
One shot, many rounds, tit-for-tat, and the last move. A higher percent is more cooperative. The middle is where conditional cooperators live.
Newcomb's Problem
A predictor has already filled the boxes. One-boxers take only the sealed box. Two-boxers take the sealed box and the visible extra money. A higher percent is a one-box lean.
Stag Hunt and Fair Offers
Two games about trust and fairness. Hunt the stag together, or take a sure hare. Accept a tiny share, or reject it and leave both of you with nothing. A higher percent is a fairness-and-assurance lean.