American football does have ties. If the score remains tied after one period of extra time the game ends in a tie. In fact the final game of this past season

American football does have ties. If the score remains tied after one period of extra time the game ends in a tie. In fact the final game of this past season famously ended up in a situation where there was a strong incentive to tie - both teams would make the playoffs is they tied, whereas the loser would be eliminated from championship contention. The game ended up tied near the end of extra time, and a big part of the drama was the resulting prisoners’ dilemma. Would the teams call a “truce” and let the game end in a tie - at the expense of a third team - or would one of them defect and try to win the game?