You have been randomly and anonymously paired with another participant. Both of you must choose either option 1 or option 2. This gives four possible outcomes, each with a different payoff, as shown in the table:

In each cell, the amount to the left is the payoff for you and to the right for the other participant.

		Participant B
		Cooperate	Defect
Participant A	Cooperate	{{ Constants.both_cooperate_payoff }}, {{ Constants.both_cooperate_payoff }}	0, {{ Constants.betray_payoff }}
	Defect	{{ Constants.betray_payoff }}, 0	{{ Constants.both_defect_payoff }}, {{ Constants.both_defect_payoff }}

• If both of you choose different strategies, the one with co-operation will get {{Constants.betrayed_payoff}} and the other will get {{Constants.betray_payoff}}.
• If you both defect, both of you will get {{Constants.both_defect_payoff}}.
• If you both co-operate, you both gain a reasonable amount ({{Constants.both_cooperate_payoff}}).

Participant A is the first mover and can decide to co-operate or defect participant B. After that, participant B (the second mover) will be announced the decision of participant A and participant B have to decide whether he/she should defect or co-operate.

The scores from each round are accumulated, so the object is to optimize the point score before reaching game over.