2-player matrix for the Prisoner's dilemma:

Here, the payoff is one's sentence (time in jail) - lower is better.

Cooperate | Defect | |
---|---|---|

Cooperate | 6 months, 6 months | 10 years, no time |

Defect | no time, 10 years | 5 years, 5 years |

2-player matrix for the Game of Chicken:

Here, the higher the payoff, the better. "Cooperation" means swerving.

Cooperate | Defect | |
---|---|---|

Cooperate | 0, 0 | -1, +1 |

Defect | +1, -1 | -20, -20 |