One Heart Less

In this game, each player has their own chest. When you press "Start Game," you enter the chest room, all chests look the same, but each one belongs to a specific player. You pick a chest using your intuition, and the moment you choose, the name of the player who owns it is revealed. By choosing a chest, you give that player one heart, which is deducted from your balance.

Every participant does the same. In the end, your chest might be filled with hearts, but you never know how many until the round is over, since it depends on how many players chose your chest.