A game that involves groups and if one person makes a mistake everything goes wrong?

A game that fits this description well is "Werewolf" or "Mafia." In these social deduction games, players are assigned secret roles, and if one player—often a key role—makes a mistake in their deduction or accusation, it can lead to the downfall of their team. The tension builds as players discuss, accuse, and defend each other, making strategic choices that can dramatically impact the outcome. A single misstep can shift the balance and lead to a swift loss for the entire group.