Buster's Growing Grudge is an educational online game based on the episode with the same name. It is part of the "Being a Friend" series, and the topic is "Forgiveness."
The game plays through a trimmed-down version of the story in the episode. Screenshots from the episode and speech bubbles are presented in a panel format. Occasionally, a splash screen will appear with a discussion question for the reader, such as if the reader thinks if Binky stole Buster's joke on purpose and why. The grudge is shown as a green blob sticking out of Buster's backpack, and it will grow and shrink depending on the events of the ending, where the reader can tell Buster what he should do about his grudge against Binky, such as confronting Binky or talking to Arthur.