play it straight

"The position you'd put me in would be this—of playing a game—and a jolly important game at that—in which the loser loses to me on purpose. . . . If we're going to play a game," he continued, addressing Davenant, before the latter had time to speak, "for Heaven's sake let us play it straight—like men. Let the winner win and the loser lose—"

And how can you not admire a man who could star in a stinker like Battlestar Galactica—and play it straight?

But the best thing about him is that he always played it straight with us—never double‐dealed, giving us two and keeping one for himself.