He was game.

game这里是形容词, 表示: 情愿的,对...有意的
She is game for any risk.
她情愿冒任何风险。
现在英文应该还有这样的说法.
The Game got his name from his grandmother, who said he was game for anything when it came to sports. He was a promising basketball player at school, ...

He was game for anything as far as departmental social events were concerned, from the infamous football game where he broke his wrist playing departmental ...

... offer at the same time he was bombastically giving the media to believe he was game for the battle initiated by his detractors to oust him! ...

well