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Welcome to the website for Oyun (oy-oon), a simulator designed to allow users to run tournaments in which various strategies (coded in C++ or as finite state machines) compete at 2x2 games like the Prisoner's Dilemma. Competitions can either be one-off round-robin tournaments, or an evolutionary tournament in which fraction of population is proportional to score in the last round of the tournament.

A journal article about Oyun has been published in Evolution: Education and Outreach. If you would like to cite Oyun, please use the citation:

Pence, C.H. & Buchak, L. 2012. “Oyun: A New, Free Program for Iterated Prisoner’s Dilemma Tournaments in the Classroom.” Evolution: Education and Outreach 5 (3): 467–476.

The current version of Oyun is v2.0 Beta 6, released on June 1, 2018.


Download Download Oyun!

Documentation Read the Oyun User Manual online

Frequently Asked Questions Frequently Asked Questions

Screenshots View some screenshots of Oyun in action

Development Development and bug reports on Codeberg | Code documentation