Definition
This idiom is used to convey that someone's secret activities or plans have been discovered and can no longer continue.
计划被识破，无法继续。
The police have gathered enough evidence; the game is up for the criminals.
警方已经收集到足够的证据；对罪犯来说，游戏结束了。
When he was caught stealing, the game was up, and he had to face the consequences.
当他被抓到偷窃时，游戏结束了，他必须面对后果。
They thought their scheme would go unnoticed, but when the boss found out, the game was up.
他们以为他们的计划不会被发现，但当老板发现时，游戏结束了。