Kaeru no Tame ni Kane wa Naru (カエルの為に鐘は鳴る), officially translated as The Frog For Whom the Bell Tolls,[1] is an action role-playing video game developed by Nintendo and Intelligent Systems[2][3][4] and published by Nintendo for the Game Boy exclusively in Japan in 1992.

The title is a play on Ernest Hemingway's For Whom the Bell Tolls, which is known in Japan as Ta ga Tame ni Kane wa Naru (誰がために鐘は鳴る).

When players make the Prince of Sablé touch an enemy, the game does not shift to a battle scene.

Victory or defeat in a typical battle is gauged by the Prince of Sablé's strength and weapon, attack speed, armor and defense, and the enemy's stats.

For bosses, the player must fill up the Prince of Sablé's life bar and have the most powerful items found at certain points before battling them to win against them.