Prisoner’s Dilemma — Single Player

You choose Cooperate or Defect. The opponent chooses randomly each round, with a configurable probability of Cooperate.

Payoff matrix (you, opponent):

You Cooperate vs Opponent Cooperate
→ (3, 3)
You Cooperate vs Opponent Defect
→ (0, 5)
You Defect vs Opponent Cooperate
→ (5, 0)
You Defect vs Opponent Defect
→ (1, 1)

Canonical PD ordering: T=5 > R=3 > P=1 > S=0 (Temptation > Reward > Punishment > Sucker).

Opponent behavior

Default = 50% Cooperate, 50% Defect.

Your total: 0 · Opponent total: 0

Last rounds

#YouOpponentYour payoffOpp payoff